/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 14:36:17,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 14:36:17,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 14:36:17,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 14:36:17,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 14:36:17,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 14:36:17,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 14:36:17,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 14:36:17,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 14:36:17,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 14:36:17,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 14:36:17,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 14:36:17,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 14:36:17,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 14:36:17,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 14:36:17,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 14:36:17,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 14:36:17,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 14:36:17,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 14:36:17,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 14:36:17,926 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 14:36:17,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 14:36:17,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 14:36:17,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 14:36:17,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 14:36:17,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 14:36:17,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 14:36:17,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 14:36:17,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 14:36:17,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 14:36:17,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 14:36:17,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 14:36:17,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 14:36:17,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 14:36:17,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 14:36:17,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 14:36:17,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 14:36:17,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 14:36:17,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 14:36:17,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 14:36:17,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 14:36:17,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 14:36:17,947 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 14:36:17,957 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 14:36:17,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 14:36:17,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 14:36:17,959 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 14:36:17,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 14:36:17,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 14:36:17,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 14:36:17,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 14:36:17,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 14:36:17,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 14:36:17,960 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 14:36:17,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 14:36:17,960 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 14:36:17,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 14:36:17,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 14:36:17,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 14:36:17,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 14:36:17,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 14:36:17,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:36:17,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 14:36:17,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 14:36:17,961 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 14:36:17,961 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 14:36:17,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 14:36:17,961 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 14:36:17,961 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 14:36:18,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 14:36:18,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 14:36:18,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 14:36:18,147 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 14:36:18,148 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 14:36:18,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-04-06 14:36:18,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea19d0c4/f69d78b51b9e44f59a3d94cdfc17454c/FLAG015b3a397 [2022-04-06 14:36:18,562 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 14:36:18,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-04-06 14:36:18,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea19d0c4/f69d78b51b9e44f59a3d94cdfc17454c/FLAG015b3a397 [2022-04-06 14:36:18,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea19d0c4/f69d78b51b9e44f59a3d94cdfc17454c [2022-04-06 14:36:18,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 14:36:18,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 14:36:18,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 14:36:18,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 14:36:18,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 14:36:18,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:36:18" (1/1) ... [2022-04-06 14:36:18,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d5aa68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:36:18, skipping insertion in model container [2022-04-06 14:36:18,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:36:18" (1/1) ... [2022-04-06 14:36:18,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 14:36:18,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 14:36:18,731 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-04-06 14:36:18,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:36:18,747 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 14:36:18,754 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-04-06 14:36:18,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:36:18,768 INFO L208 MainTranslator]: Completed translation [2022-04-06 14:36:18,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:36:18 WrapperNode [2022-04-06 14:36:18,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 14:36:18,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 14:36:18,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 14:36:18,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 14:36:18,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:36:18" (1/1) ... [2022-04-06 14:36:18,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:36:18" (1/1) ... [2022-04-06 14:36:18,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:36:18" (1/1) ... [2022-04-06 14:36:18,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:36:18" (1/1) ... [2022-04-06 14:36:18,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:36:18" (1/1) ... [2022-04-06 14:36:18,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:36:18" (1/1) ... [2022-04-06 14:36:18,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:36:18" (1/1) ... [2022-04-06 14:36:18,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 14:36:18,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 14:36:18,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 14:36:18,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 14:36:18,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:36:18" (1/1) ... [2022-04-06 14:36:18,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:36:18,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:18,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 14:36:18,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 14:36:18,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 14:36:18,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 14:36:18,854 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 14:36:18,854 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 14:36:18,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 14:36:18,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 14:36:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 14:36:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 14:36:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 14:36:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 14:36:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 14:36:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 14:36:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 14:36:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 14:36:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 14:36:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 14:36:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 14:36:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 14:36:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 14:36:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 14:36:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 14:36:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 14:36:18,936 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 14:36:18,937 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 14:36:19,017 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 14:36:19,021 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 14:36:19,021 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 14:36:19,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:36:19 BoogieIcfgContainer [2022-04-06 14:36:19,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 14:36:19,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 14:36:19,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 14:36:19,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 14:36:19,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 02:36:18" (1/3) ... [2022-04-06 14:36:19,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16779619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:36:19, skipping insertion in model container [2022-04-06 14:36:19,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:36:18" (2/3) ... [2022-04-06 14:36:19,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16779619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:36:19, skipping insertion in model container [2022-04-06 14:36:19,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:36:19" (3/3) ... [2022-04-06 14:36:19,037 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2022-04-06 14:36:19,040 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 14:36:19,040 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 14:36:19,080 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 14:36:19,085 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 14:36:19,085 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 14:36:19,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:36:19,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 14:36:19,098 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:19,098 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:19,099 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash -623416428, now seen corresponding path program 1 times [2022-04-06 14:36:19,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:19,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [763626013] [2022-04-06 14:36:19,114 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:19,114 INFO L85 PathProgramCache]: Analyzing trace with hash -623416428, now seen corresponding path program 2 times [2022-04-06 14:36:19,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:19,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534928837] [2022-04-06 14:36:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:19,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:19,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:19,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:19,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534928837] [2022-04-06 14:36:19,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534928837] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:19,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:19,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:36:19,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:19,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [763626013] [2022-04-06 14:36:19,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [763626013] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:19,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:19,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:36:19,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469146654] [2022-04-06 14:36:19,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:19,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 14:36:19,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:19,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 14:36:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:36:19,296 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:19,340 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-04-06 14:36:19,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 14:36:19,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 14:36:19,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:19,351 INFO L225 Difference]: With dead ends: 43 [2022-04-06 14:36:19,351 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 14:36:19,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:36:19,355 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:19,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:36:19,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 14:36:19,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 14:36:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-04-06 14:36:19,389 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2022-04-06 14:36:19,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:19,390 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-04-06 14:36:19,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:19,390 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-04-06 14:36:19,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 14:36:19,390 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:19,390 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:19,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 14:36:19,391 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1308012743, now seen corresponding path program 1 times [2022-04-06 14:36:19,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:19,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067500342] [2022-04-06 14:36:19,392 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:19,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1308012743, now seen corresponding path program 2 times [2022-04-06 14:36:19,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:19,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736613335] [2022-04-06 14:36:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:19,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:19,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:19,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736613335] [2022-04-06 14:36:19,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736613335] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:19,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:19,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:36:19,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:19,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067500342] [2022-04-06 14:36:19,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067500342] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:19,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:19,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:36:19,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989992871] [2022-04-06 14:36:19,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:19,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:36:19,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:19,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:36:19,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 14:36:19,515 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:19,590 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-04-06 14:36:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:36:19,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 14:36:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:19,592 INFO L225 Difference]: With dead ends: 29 [2022-04-06 14:36:19,596 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 14:36:19,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 14:36:19,597 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:19,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:36:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 14:36:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-04-06 14:36:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-04-06 14:36:19,602 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-04-06 14:36:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:19,602 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-04-06 14:36:19,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-04-06 14:36:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 14:36:19,603 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:19,603 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:19,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 14:36:19,603 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1066675892, now seen corresponding path program 1 times [2022-04-06 14:36:19,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:19,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1802228018] [2022-04-06 14:36:19,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1066675892, now seen corresponding path program 2 times [2022-04-06 14:36:19,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:19,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550483917] [2022-04-06 14:36:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:19,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:19,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:19,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:19,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550483917] [2022-04-06 14:36:19,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550483917] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:19,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829408956] [2022-04-06 14:36:19,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:19,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:19,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:19,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:19,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 14:36:19,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:19,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:19,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 14:36:19,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:19,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:19,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829408956] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:19,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:19,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 14:36:19,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:19,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1802228018] [2022-04-06 14:36:19,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1802228018] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:19,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:19,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:36:19,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539022518] [2022-04-06 14:36:19,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:19,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:36:19,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:19,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:36:19,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:36:19,910 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:19,980 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-06 14:36:19,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:36:19,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 14:36:19,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:19,983 INFO L225 Difference]: With dead ends: 38 [2022-04-06 14:36:19,983 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 14:36:19,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-04-06 14:36:19,984 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:19,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:36:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 14:36:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-04-06 14:36:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-06 14:36:19,989 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2022-04-06 14:36:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:19,990 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-06 14:36:19,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:19,990 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-06 14:36:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 14:36:19,990 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:19,990 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:20,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:20,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:20,207 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1780147345, now seen corresponding path program 3 times [2022-04-06 14:36:20,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:20,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1547544896] [2022-04-06 14:36:20,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:20,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1780147345, now seen corresponding path program 4 times [2022-04-06 14:36:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:20,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434637524] [2022-04-06 14:36:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:20,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:20,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:20,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:20,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434637524] [2022-04-06 14:36:20,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434637524] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:20,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286604031] [2022-04-06 14:36:20,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:20,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:20,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:20,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:20,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:20,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:20,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:36:20,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:20,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 14:36:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:20,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:20,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286604031] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:20,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:20,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 14:36:20,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:20,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1547544896] [2022-04-06 14:36:20,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1547544896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:20,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:20,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:36:20,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959986432] [2022-04-06 14:36:20,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:20,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:36:20,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:20,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:36:20,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-04-06 14:36:20,458 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:20,546 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-04-06 14:36:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:36:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 14:36:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:20,547 INFO L225 Difference]: With dead ends: 43 [2022-04-06 14:36:20,547 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 14:36:20,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-04-06 14:36:20,548 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:20,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:36:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 14:36:20,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-04-06 14:36:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-04-06 14:36:20,554 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-04-06 14:36:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:20,554 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-04-06 14:36:20,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:20,554 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-04-06 14:36:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 14:36:20,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:20,555 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:20,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:20,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 14:36:20,788 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:20,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1683110550, now seen corresponding path program 5 times [2022-04-06 14:36:20,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:20,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [911118088] [2022-04-06 14:36:20,789 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:20,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1683110550, now seen corresponding path program 6 times [2022-04-06 14:36:20,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:20,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425162254] [2022-04-06 14:36:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:20,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:20,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:20,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:20,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425162254] [2022-04-06 14:36:20,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425162254] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:20,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332650837] [2022-04-06 14:36:20,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:20,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:20,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:20,847 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:20,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 14:36:20,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 14:36:20,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:20,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:36:20,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:20,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:20,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332650837] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:20,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:20,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 14:36:20,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:20,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [911118088] [2022-04-06 14:36:20,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [911118088] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:20,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:20,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:36:20,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613588005] [2022-04-06 14:36:20,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:20,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:36:20,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:20,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:36:20,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-04-06 14:36:20,997 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:21,084 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-04-06 14:36:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:36:21,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 14:36:21,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:21,085 INFO L225 Difference]: With dead ends: 48 [2022-04-06 14:36:21,085 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 14:36:21,085 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-04-06 14:36:21,086 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:21,086 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 35 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:36:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 14:36:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-04-06 14:36:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-04-06 14:36:21,091 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 23 [2022-04-06 14:36:21,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:21,092 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-04-06 14:36:21,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:21,092 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-04-06 14:36:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 14:36:21,092 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:21,092 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:21,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:21,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:21,313 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1374936229, now seen corresponding path program 7 times [2022-04-06 14:36:21,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:21,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [688171591] [2022-04-06 14:36:21,314 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1374936229, now seen corresponding path program 8 times [2022-04-06 14:36:21,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:21,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630617230] [2022-04-06 14:36:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:21,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:21,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:21,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:21,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630617230] [2022-04-06 14:36:21,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630617230] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:21,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349423361] [2022-04-06 14:36:21,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:21,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:21,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:21,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:21,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 14:36:21,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:21,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:21,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 14:36:21,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:21,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:21,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349423361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:21,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:21,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 14:36:21,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:21,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [688171591] [2022-04-06 14:36:21,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [688171591] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:21,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:21,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:36:21,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320908373] [2022-04-06 14:36:21,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:21,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:36:21,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:36:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:36:21,555 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:21,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:21,665 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-04-06 14:36:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:36:21,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 14:36:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:21,666 INFO L225 Difference]: With dead ends: 53 [2022-04-06 14:36:21,666 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 14:36:21,666 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-04-06 14:36:21,667 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:21,667 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 35 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 14:36:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-04-06 14:36:21,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-04-06 14:36:21,673 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2022-04-06 14:36:21,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:21,673 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-04-06 14:36:21,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-04-06 14:36:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 14:36:21,674 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:21,674 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:21,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:21,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:21,891 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:21,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1894706912, now seen corresponding path program 9 times [2022-04-06 14:36:21,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:21,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925268420] [2022-04-06 14:36:21,892 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:21,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1894706912, now seen corresponding path program 10 times [2022-04-06 14:36:21,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:21,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091356679] [2022-04-06 14:36:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:21,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:21,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:22,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:22,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091356679] [2022-04-06 14:36:22,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091356679] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:22,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798615438] [2022-04-06 14:36:22,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:22,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:22,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:22,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:22,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 14:36:22,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:22,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:22,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 14:36:22,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:22,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:22,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798615438] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:22,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:22,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 14:36:22,208 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:22,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925268420] [2022-04-06 14:36:22,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925268420] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:22,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:22,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:36:22,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762780835] [2022-04-06 14:36:22,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:22,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:36:22,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:22,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:36:22,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-04-06 14:36:22,210 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:22,343 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2022-04-06 14:36:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:36:22,344 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 14:36:22,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:22,344 INFO L225 Difference]: With dead ends: 58 [2022-04-06 14:36:22,344 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 14:36:22,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:36:22,345 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:22,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 40 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:22,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 14:36:22,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-04-06 14:36:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-04-06 14:36:22,352 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 27 [2022-04-06 14:36:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:22,352 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-04-06 14:36:22,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-04-06 14:36:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 14:36:22,353 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:22,353 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:22,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:22,580 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:22,580 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:22,581 INFO L85 PathProgramCache]: Analyzing trace with hash -105704741, now seen corresponding path program 11 times [2022-04-06 14:36:22,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:22,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [15211534] [2022-04-06 14:36:22,581 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:22,581 INFO L85 PathProgramCache]: Analyzing trace with hash -105704741, now seen corresponding path program 12 times [2022-04-06 14:36:22,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:22,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001807757] [2022-04-06 14:36:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:22,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:22,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:22,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:22,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001807757] [2022-04-06 14:36:22,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001807757] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:22,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551544733] [2022-04-06 14:36:22,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:22,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:22,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:22,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:22,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 14:36:22,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:36:22,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:22,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 14:36:22,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:22,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:22,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551544733] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:22,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:22,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 14:36:22,911 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:22,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [15211534] [2022-04-06 14:36:22,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [15211534] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:22,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:22,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:36:22,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018097807] [2022-04-06 14:36:22,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:22,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:36:22,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:22,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:36:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-04-06 14:36:22,912 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:23,056 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-04-06 14:36:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:36:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 14:36:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:23,057 INFO L225 Difference]: With dead ends: 63 [2022-04-06 14:36:23,057 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 14:36:23,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2022-04-06 14:36:23,058 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:23,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 45 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 14:36:23,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-04-06 14:36:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:23,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-04-06 14:36:23,065 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 29 [2022-04-06 14:36:23,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:23,065 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-04-06 14:36:23,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-04-06 14:36:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 14:36:23,065 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:23,066 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:23,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:23,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:23,282 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1138463190, now seen corresponding path program 13 times [2022-04-06 14:36:23,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:23,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [231732863] [2022-04-06 14:36:23,283 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1138463190, now seen corresponding path program 14 times [2022-04-06 14:36:23,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:23,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776912607] [2022-04-06 14:36:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:23,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:23,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:23,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:23,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776912607] [2022-04-06 14:36:23,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776912607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:23,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126795734] [2022-04-06 14:36:23,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:23,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:23,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:23,363 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:23,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 14:36:23,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:23,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 14:36:23,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:23,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:23,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126795734] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:23,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:23,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 14:36:23,597 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:23,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [231732863] [2022-04-06 14:36:23,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [231732863] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:23,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:23,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:36:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499330920] [2022-04-06 14:36:23,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:23,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:36:23,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:23,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:36:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:36:23,599 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:23,747 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-04-06 14:36:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:36:23,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 14:36:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:23,748 INFO L225 Difference]: With dead ends: 68 [2022-04-06 14:36:23,748 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 14:36:23,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:36:23,749 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:23,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 50 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 14:36:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-04-06 14:36:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-04-06 14:36:23,756 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 31 [2022-04-06 14:36:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:23,756 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-04-06 14:36:23,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-04-06 14:36:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 14:36:23,757 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:23,757 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:23,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:23,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:23,974 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:23,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1512030703, now seen corresponding path program 15 times [2022-04-06 14:36:23,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:23,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1122278486] [2022-04-06 14:36:23,975 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:23,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1512030703, now seen corresponding path program 16 times [2022-04-06 14:36:23,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:23,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699790297] [2022-04-06 14:36:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:23,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:24,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:24,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:24,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699790297] [2022-04-06 14:36:24,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699790297] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:24,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718788541] [2022-04-06 14:36:24,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:24,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:24,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:24,100 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:24,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 14:36:24,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:24,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:24,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 14:36:24,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:24,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:24,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718788541] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:24,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:24,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 14:36:24,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:24,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1122278486] [2022-04-06 14:36:24,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1122278486] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:24,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:24,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:36:24,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817014331] [2022-04-06 14:36:24,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:24,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:36:24,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:24,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:36:24,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:36:24,358 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:24,508 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-04-06 14:36:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:36:24,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 14:36:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:24,509 INFO L225 Difference]: With dead ends: 73 [2022-04-06 14:36:24,509 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 14:36:24,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=422, Invalid=910, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 14:36:24,510 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:24,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 40 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 14:36:24,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-04-06 14:36:24,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:24,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-04-06 14:36:24,518 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 33 [2022-04-06 14:36:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:24,518 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-04-06 14:36:24,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-04-06 14:36:24,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 14:36:24,519 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:24,519 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:24,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:24,735 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,SelfDestructingSolverStorable9 [2022-04-06 14:36:24,735 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1721055348, now seen corresponding path program 17 times [2022-04-06 14:36:24,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:24,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [326949368] [2022-04-06 14:36:24,736 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1721055348, now seen corresponding path program 18 times [2022-04-06 14:36:24,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:24,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103462126] [2022-04-06 14:36:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:24,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:24,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:24,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:24,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103462126] [2022-04-06 14:36:24,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103462126] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:24,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740436293] [2022-04-06 14:36:24,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:24,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:24,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:24,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:24,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 14:36:24,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 14:36:24,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:24,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 14:36:24,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:24,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:25,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740436293] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:25,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:25,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 14:36:25,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:25,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [326949368] [2022-04-06 14:36:25,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [326949368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:25,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:25,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:36:25,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954548028] [2022-04-06 14:36:25,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:25,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:36:25,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:25,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:36:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:36:25,120 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:25,323 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2022-04-06 14:36:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:36:25,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 14:36:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:25,324 INFO L225 Difference]: With dead ends: 78 [2022-04-06 14:36:25,324 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 14:36:25,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=506, Invalid=1054, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 14:36:25,325 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:25,325 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 40 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:25,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 14:36:25,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2022-04-06 14:36:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-04-06 14:36:25,334 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 35 [2022-04-06 14:36:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:25,335 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-04-06 14:36:25,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-04-06 14:36:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 14:36:25,338 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:25,338 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:25,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:25,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:25,538 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:25,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:25,539 INFO L85 PathProgramCache]: Analyzing trace with hash -730276281, now seen corresponding path program 19 times [2022-04-06 14:36:25,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:25,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960217845] [2022-04-06 14:36:25,539 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:25,539 INFO L85 PathProgramCache]: Analyzing trace with hash -730276281, now seen corresponding path program 20 times [2022-04-06 14:36:25,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:25,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530914740] [2022-04-06 14:36:25,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:25,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:25,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:25,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:25,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530914740] [2022-04-06 14:36:25,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530914740] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:25,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404941484] [2022-04-06 14:36:25,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:25,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:25,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:25,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:25,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 14:36:25,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:25,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 14:36:25,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:25,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:26,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404941484] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:26,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:26,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 14:36:26,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960217845] [2022-04-06 14:36:26,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960217845] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:26,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:26,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:36:26,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668015760] [2022-04-06 14:36:26,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:26,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:36:26,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:36:26,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-04-06 14:36:26,034 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:26,221 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2022-04-06 14:36:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 14:36:26,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 14:36:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:26,222 INFO L225 Difference]: With dead ends: 83 [2022-04-06 14:36:26,222 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 14:36:26,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=598, Invalid=1208, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 14:36:26,223 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 139 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:26,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 35 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 14:36:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-04-06 14:36:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-04-06 14:36:26,231 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 37 [2022-04-06 14:36:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:26,232 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-04-06 14:36:26,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-04-06 14:36:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 14:36:26,232 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:26,232 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:26,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-06 14:36:26,450 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,SelfDestructingSolverStorable11 [2022-04-06 14:36:26,450 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:26,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2074332606, now seen corresponding path program 21 times [2022-04-06 14:36:26,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:26,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [252128939] [2022-04-06 14:36:26,451 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:26,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2074332606, now seen corresponding path program 22 times [2022-04-06 14:36:26,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:26,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709526710] [2022-04-06 14:36:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:26,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:26,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:26,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:26,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709526710] [2022-04-06 14:36:26,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709526710] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:26,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434471358] [2022-04-06 14:36:26,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:26,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:26,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:26,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:26,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 14:36:26,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:26,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 14:36:26,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:26,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:26,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434471358] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:26,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:26,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 14:36:26,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:26,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [252128939] [2022-04-06 14:36:26,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [252128939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:26,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:26,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:36:26,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93450137] [2022-04-06 14:36:26,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:26,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:36:26,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:26,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:36:26,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2022-04-06 14:36:26,910 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:27,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:27,119 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2022-04-06 14:36:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:36:27,119 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 14:36:27,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:27,120 INFO L225 Difference]: With dead ends: 88 [2022-04-06 14:36:27,120 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 14:36:27,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=698, Invalid=1372, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 14:36:27,121 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 152 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:27,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 40 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 14:36:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2022-04-06 14:36:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-04-06 14:36:27,131 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 39 [2022-04-06 14:36:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:27,131 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-04-06 14:36:27,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:27,132 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-04-06 14:36:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 14:36:27,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:27,132 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:27,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:27,348 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,SelfDestructingSolverStorable12 [2022-04-06 14:36:27,349 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash -927304835, now seen corresponding path program 23 times [2022-04-06 14:36:27,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:27,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [956818585] [2022-04-06 14:36:27,349 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:27,350 INFO L85 PathProgramCache]: Analyzing trace with hash -927304835, now seen corresponding path program 24 times [2022-04-06 14:36:27,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:27,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782518236] [2022-04-06 14:36:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:27,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:27,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:27,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782518236] [2022-04-06 14:36:27,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782518236] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:27,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229346808] [2022-04-06 14:36:27,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:27,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:27,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:27,476 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:27,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 14:36:27,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 14:36:27,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:27,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 14:36:27,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:27,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:27,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229346808] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:27,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:27,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 14:36:27,827 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:27,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [956818585] [2022-04-06 14:36:27,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [956818585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:27,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:27,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 14:36:27,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299612517] [2022-04-06 14:36:27,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:27,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 14:36:27,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:27,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 14:36:27,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=704, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:36:27,829 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:28,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:28,101 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2022-04-06 14:36:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 14:36:28,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 14:36:28,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:28,102 INFO L225 Difference]: With dead ends: 93 [2022-04-06 14:36:28,102 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 14:36:28,103 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=806, Invalid=1546, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 14:36:28,103 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 177 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:28,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 40 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 14:36:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2022-04-06 14:36:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 75 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2022-04-06 14:36:28,113 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 41 [2022-04-06 14:36:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:28,113 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2022-04-06 14:36:28,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2022-04-06 14:36:28,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 14:36:28,113 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:28,114 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:28,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:28,329 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,SelfDestructingSolverStorable13 [2022-04-06 14:36:28,329 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1854755320, now seen corresponding path program 25 times [2022-04-06 14:36:28,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:28,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1442692892] [2022-04-06 14:36:28,330 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1854755320, now seen corresponding path program 26 times [2022-04-06 14:36:28,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:28,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428565552] [2022-04-06 14:36:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:28,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:28,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:28,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:28,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428565552] [2022-04-06 14:36:28,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428565552] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:28,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139441979] [2022-04-06 14:36:28,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:28,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:28,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:28,474 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:28,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 14:36:28,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:28,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:28,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 14:36:28,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:28,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:28,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139441979] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:28,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:28,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 14:36:28,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:28,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1442692892] [2022-04-06 14:36:28,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1442692892] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:28,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:28,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 14:36:28,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467126875] [2022-04-06 14:36:28,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:28,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 14:36:28,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 14:36:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 14:36:28,917 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:29,168 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-04-06 14:36:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 14:36:29,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 14:36:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:29,169 INFO L225 Difference]: With dead ends: 98 [2022-04-06 14:36:29,169 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 14:36:29,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=922, Invalid=1730, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:36:29,170 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 172 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:29,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 40 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:29,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 14:36:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2022-04-06 14:36:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.1875) internal successors, (95), 80 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-04-06 14:36:29,180 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 43 [2022-04-06 14:36:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:29,180 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-04-06 14:36:29,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-04-06 14:36:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 14:36:29,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:29,181 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:29,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:29,396 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,SelfDestructingSolverStorable14 [2022-04-06 14:36:29,397 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:29,397 INFO L85 PathProgramCache]: Analyzing trace with hash -350061133, now seen corresponding path program 27 times [2022-04-06 14:36:29,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:29,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [623284470] [2022-04-06 14:36:29,398 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:29,398 INFO L85 PathProgramCache]: Analyzing trace with hash -350061133, now seen corresponding path program 28 times [2022-04-06 14:36:29,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:29,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258279773] [2022-04-06 14:36:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:29,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:29,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:29,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:29,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258279773] [2022-04-06 14:36:29,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258279773] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:29,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383596976] [2022-04-06 14:36:29,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:29,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:29,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:29,612 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:29,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 14:36:29,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:29,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 14:36:29,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:29,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:30,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383596976] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:30,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:30,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 14:36:30,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:30,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [623284470] [2022-04-06 14:36:30,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [623284470] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:30,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:30,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 14:36:30,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601892392] [2022-04-06 14:36:30,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:30,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 14:36:30,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:30,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 14:36:30,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=866, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:36:30,094 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:30,370 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2022-04-06 14:36:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 14:36:30,370 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 14:36:30,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:30,371 INFO L225 Difference]: With dead ends: 103 [2022-04-06 14:36:30,371 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 14:36:30,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1046, Invalid=1924, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 14:36:30,372 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 200 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:30,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 40 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 14:36:30,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2022-04-06 14:36:30,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.188235294117647) internal successors, (101), 85 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-04-06 14:36:30,383 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 45 [2022-04-06 14:36:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:30,383 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-04-06 14:36:30,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:30,383 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-04-06 14:36:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 14:36:30,383 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:30,383 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:30,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:30,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:30,600 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:30,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1759795538, now seen corresponding path program 29 times [2022-04-06 14:36:30,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:30,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1241612649] [2022-04-06 14:36:30,601 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1759795538, now seen corresponding path program 30 times [2022-04-06 14:36:30,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:30,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746813372] [2022-04-06 14:36:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:30,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:30,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:30,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:30,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746813372] [2022-04-06 14:36:30,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746813372] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:30,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029485509] [2022-04-06 14:36:30,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:30,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:30,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:30,751 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:30,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 14:36:30,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 14:36:30,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 14:36:30,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:30,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:31,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029485509] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:31,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:31,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 14:36:31,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:31,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1241612649] [2022-04-06 14:36:31,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1241612649] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:31,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:31,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 14:36:31,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83387888] [2022-04-06 14:36:31,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:31,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 14:36:31,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:31,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 14:36:31,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=953, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 14:36:31,245 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:31,468 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2022-04-06 14:36:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 14:36:31,469 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 14:36:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:31,469 INFO L225 Difference]: With dead ends: 108 [2022-04-06 14:36:31,469 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 14:36:31,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1178, Invalid=2128, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 14:36:31,471 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 171 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:31,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 55 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 14:36:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2022-04-06 14:36:31,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 90 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-04-06 14:36:31,483 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 47 [2022-04-06 14:36:31,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:31,483 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-04-06 14:36:31,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-04-06 14:36:31,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 14:36:31,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:31,484 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:31,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:31,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 14:36:31,688 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:31,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:31,688 INFO L85 PathProgramCache]: Analyzing trace with hash 695106793, now seen corresponding path program 31 times [2022-04-06 14:36:31,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:31,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [601957281] [2022-04-06 14:36:31,689 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:31,689 INFO L85 PathProgramCache]: Analyzing trace with hash 695106793, now seen corresponding path program 32 times [2022-04-06 14:36:31,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:31,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297368081] [2022-04-06 14:36:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:31,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:31,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:31,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:31,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297368081] [2022-04-06 14:36:31,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297368081] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:31,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116256822] [2022-04-06 14:36:31,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:31,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:31,888 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:31,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 14:36:31,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:31,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:31,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 14:36:31,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:32,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:32,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116256822] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:32,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:32,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 14:36:32,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:32,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [601957281] [2022-04-06 14:36:32,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [601957281] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:32,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:32,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 14:36:32,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952088638] [2022-04-06 14:36:32,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:32,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 14:36:32,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:32,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 14:36:32,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=1044, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 14:36:32,403 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:32,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:32,755 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2022-04-06 14:36:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 14:36:32,755 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 14:36:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:32,756 INFO L225 Difference]: With dead ends: 113 [2022-04-06 14:36:32,756 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 14:36:32,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1318, Invalid=2342, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 14:36:32,758 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 196 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:32,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 50 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 14:36:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2022-04-06 14:36:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 95 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-04-06 14:36:32,772 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 49 [2022-04-06 14:36:32,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:32,772 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-04-06 14:36:32,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:32,772 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-04-06 14:36:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 14:36:32,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:32,773 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:32,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:32,993 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 14:36:32,993 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:32,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1919201380, now seen corresponding path program 33 times [2022-04-06 14:36:32,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:32,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1956686673] [2022-04-06 14:36:32,994 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:32,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1919201380, now seen corresponding path program 34 times [2022-04-06 14:36:32,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:32,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570017345] [2022-04-06 14:36:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:32,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:33,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:33,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:33,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570017345] [2022-04-06 14:36:33,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570017345] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:33,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954247995] [2022-04-06 14:36:33,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:33,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:33,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:33,191 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:33,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 14:36:33,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:33,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:33,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 14:36:33,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:33,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:33,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954247995] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:33,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:33,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 14:36:33,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:33,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1956686673] [2022-04-06 14:36:33,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1956686673] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:33,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:33,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 14:36:33,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124196406] [2022-04-06 14:36:33,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:33,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 14:36:33,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 14:36:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=1139, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 14:36:33,724 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:33,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:33,981 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2022-04-06 14:36:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 14:36:33,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 14:36:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:33,982 INFO L225 Difference]: With dead ends: 118 [2022-04-06 14:36:33,982 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 14:36:33,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1466, Invalid=2566, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 14:36:33,984 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 212 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:33,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 45 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 14:36:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2022-04-06 14:36:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.19) internal successors, (119), 100 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2022-04-06 14:36:33,998 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 51 [2022-04-06 14:36:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:33,998 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2022-04-06 14:36:33,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2022-04-06 14:36:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 14:36:33,999 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:33,999 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:34,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:34,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:34,215 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:34,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:34,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1453060383, now seen corresponding path program 35 times [2022-04-06 14:36:34,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:34,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [218200417] [2022-04-06 14:36:34,216 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:34,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1453060383, now seen corresponding path program 36 times [2022-04-06 14:36:34,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:34,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301355144] [2022-04-06 14:36:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:34,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:34,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:34,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:34,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301355144] [2022-04-06 14:36:34,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301355144] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:34,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903810909] [2022-04-06 14:36:34,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:34,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:34,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:34,383 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:34,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 14:36:34,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 14:36:34,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:34,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 14:36:34,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:34,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:34,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903810909] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:34,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:34,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 14:36:34,868 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:34,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [218200417] [2022-04-06 14:36:34,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [218200417] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:34,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:34,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 14:36:34,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524547276] [2022-04-06 14:36:34,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:34,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 14:36:34,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:34,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 14:36:34,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=832, Invalid=1238, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 14:36:34,870 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:35,164 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2022-04-06 14:36:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 14:36:35,164 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 14:36:35,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:35,165 INFO L225 Difference]: With dead ends: 123 [2022-04-06 14:36:35,165 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 14:36:35,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1622, Invalid=2800, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 14:36:35,167 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 252 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:35,167 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 35 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 14:36:35,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2022-04-06 14:36:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 105 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2022-04-06 14:36:35,182 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 53 [2022-04-06 14:36:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:35,182 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2022-04-06 14:36:35,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2022-04-06 14:36:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 14:36:35,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:35,183 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:35,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:35,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:35,399 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash 168161050, now seen corresponding path program 37 times [2022-04-06 14:36:35,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:35,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1909828482] [2022-04-06 14:36:35,400 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash 168161050, now seen corresponding path program 38 times [2022-04-06 14:36:35,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:35,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497494610] [2022-04-06 14:36:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:35,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:35,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:35,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:35,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497494610] [2022-04-06 14:36:35,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497494610] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:35,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10874927] [2022-04-06 14:36:35,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:35,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:35,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:35,614 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:35,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 14:36:35,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:35,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:35,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 14:36:35,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:35,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:36,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10874927] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:36,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:36,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 14:36:36,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:36,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1909828482] [2022-04-06 14:36:36,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1909828482] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:36,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:36,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 14:36:36,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390013720] [2022-04-06 14:36:36,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:36,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 14:36:36,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:36,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 14:36:36,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=1341, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 14:36:36,255 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:36,560 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2022-04-06 14:36:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 14:36:36,560 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 14:36:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:36,561 INFO L225 Difference]: With dead ends: 128 [2022-04-06 14:36:36,561 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 14:36:36,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1786, Invalid=3044, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 14:36:36,563 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 247 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:36,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 40 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 14:36:36,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2022-04-06 14:36:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2022-04-06 14:36:36,604 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 55 [2022-04-06 14:36:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:36,604 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2022-04-06 14:36:36,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2022-04-06 14:36:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 14:36:36,605 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:36,605 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:36,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:36,805 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:36,806 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:36,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1964484011, now seen corresponding path program 39 times [2022-04-06 14:36:36,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:36,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [3042508] [2022-04-06 14:36:36,806 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1964484011, now seen corresponding path program 40 times [2022-04-06 14:36:36,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:36,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850343449] [2022-04-06 14:36:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:36,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:37,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:37,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:37,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850343449] [2022-04-06 14:36:37,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850343449] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:37,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043025614] [2022-04-06 14:36:37,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:37,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:37,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:37,033 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:37,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 14:36:37,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:37,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:37,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 14:36:37,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:37,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:37,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043025614] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:37,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:37,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 14:36:37,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:37,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [3042508] [2022-04-06 14:36:37,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [3042508] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:37,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:37,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 14:36:37,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206494340] [2022-04-06 14:36:37,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:37,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 14:36:37,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:37,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 14:36:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=1448, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 14:36:37,788 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:38,255 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2022-04-06 14:36:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 14:36:38,256 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 14:36:38,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:38,256 INFO L225 Difference]: With dead ends: 133 [2022-04-06 14:36:38,256 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 14:36:38,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1958, Invalid=3298, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 14:36:38,258 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 269 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:38,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 40 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 14:36:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2022-04-06 14:36:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.191304347826087) internal successors, (137), 115 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2022-04-06 14:36:38,278 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 57 [2022-04-06 14:36:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:38,278 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2022-04-06 14:36:38,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2022-04-06 14:36:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 14:36:38,282 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:38,282 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:38,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:38,498 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,SelfDestructingSolverStorable21 [2022-04-06 14:36:38,498 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1557979856, now seen corresponding path program 41 times [2022-04-06 14:36:38,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:38,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [122752433] [2022-04-06 14:36:38,499 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1557979856, now seen corresponding path program 42 times [2022-04-06 14:36:38,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:38,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286940297] [2022-04-06 14:36:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:38,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:38,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:38,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:38,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286940297] [2022-04-06 14:36:38,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286940297] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:38,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252968540] [2022-04-06 14:36:38,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:38,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:38,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:38,707 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:38,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 14:36:38,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 14:36:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 14:36:38,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:38,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:39,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252968540] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:39,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:39,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 14:36:39,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:39,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [122752433] [2022-04-06 14:36:39,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [122752433] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:39,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:39,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 14:36:39,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308781463] [2022-04-06 14:36:39,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:39,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 14:36:39,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:39,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 14:36:39,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1093, Invalid=1559, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:36:39,175 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:39,462 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2022-04-06 14:36:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 14:36:39,462 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 14:36:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:39,466 INFO L225 Difference]: With dead ends: 138 [2022-04-06 14:36:39,466 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 14:36:39,467 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2138, Invalid=3562, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 14:36:39,467 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 321 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:39,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 40 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 14:36:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2022-04-06 14:36:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 120 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2022-04-06 14:36:39,502 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 59 [2022-04-06 14:36:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:39,502 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2022-04-06 14:36:39,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2022-04-06 14:36:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 14:36:39,503 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:39,503 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:39,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:39,711 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,SelfDestructingSolverStorable22 [2022-04-06 14:36:39,711 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:39,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2083440501, now seen corresponding path program 43 times [2022-04-06 14:36:39,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:39,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1775813226] [2022-04-06 14:36:39,712 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:39,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2083440501, now seen corresponding path program 44 times [2022-04-06 14:36:39,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:39,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385555861] [2022-04-06 14:36:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:39,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:39,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:39,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:39,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385555861] [2022-04-06 14:36:39,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385555861] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:39,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897140546] [2022-04-06 14:36:39,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:39,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:39,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:39,947 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:39,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 14:36:40,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:40,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:40,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 14:36:40,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:40,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:40,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897140546] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:40,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:40,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 14:36:40,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:40,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1775813226] [2022-04-06 14:36:40,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1775813226] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:40,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:40,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 14:36:40,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775271553] [2022-04-06 14:36:40,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:40,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 14:36:40,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:40,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 14:36:40,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=1674, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 14:36:40,765 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:41,165 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2022-04-06 14:36:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 14:36:41,165 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 14:36:41,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:41,166 INFO L225 Difference]: With dead ends: 143 [2022-04-06 14:36:41,166 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 14:36:41,167 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2326, Invalid=3836, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 14:36:41,167 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 343 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:41,167 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 45 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 14:36:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2022-04-06 14:36:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.192) internal successors, (149), 125 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:41,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 153 transitions. [2022-04-06 14:36:41,188 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 153 transitions. Word has length 61 [2022-04-06 14:36:41,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:41,188 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 153 transitions. [2022-04-06 14:36:41,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 153 transitions. [2022-04-06 14:36:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 14:36:41,189 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:41,189 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:41,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:41,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:41,405 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1090057338, now seen corresponding path program 45 times [2022-04-06 14:36:41,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:41,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [857279925] [2022-04-06 14:36:41,406 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1090057338, now seen corresponding path program 46 times [2022-04-06 14:36:41,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:41,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078630801] [2022-04-06 14:36:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:41,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:41,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:41,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078630801] [2022-04-06 14:36:41,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078630801] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385234544] [2022-04-06 14:36:41,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:41,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:41,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:41,696 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:41,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 14:36:41,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:41,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:41,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 14:36:41,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:41,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:42,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385234544] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:42,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:42,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 14:36:42,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:42,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [857279925] [2022-04-06 14:36:42,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [857279925] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:42,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:42,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 14:36:42,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528280273] [2022-04-06 14:36:42,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:42,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 14:36:42,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:42,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 14:36:42,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1287, Invalid=1793, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 14:36:42,552 INFO L87 Difference]: Start difference. First operand 130 states and 153 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:43,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:43,088 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2022-04-06 14:36:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 14:36:43,088 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 14:36:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:43,089 INFO L225 Difference]: With dead ends: 148 [2022-04-06 14:36:43,089 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 14:36:43,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2522, Invalid=4120, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 14:36:43,090 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 326 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:43,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 30 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:36:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 14:36:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2022-04-06 14:36:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 130 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2022-04-06 14:36:43,113 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 63 [2022-04-06 14:36:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:43,113 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2022-04-06 14:36:43,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2022-04-06 14:36:43,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 14:36:43,114 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:43,114 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:43,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:43,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:43,330 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:43,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:43,331 INFO L85 PathProgramCache]: Analyzing trace with hash 68422593, now seen corresponding path program 47 times [2022-04-06 14:36:43,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:43,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [361126889] [2022-04-06 14:36:43,331 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:43,331 INFO L85 PathProgramCache]: Analyzing trace with hash 68422593, now seen corresponding path program 48 times [2022-04-06 14:36:43,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:43,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290549438] [2022-04-06 14:36:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:43,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:43,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:43,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:43,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290549438] [2022-04-06 14:36:43,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290549438] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:43,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812531940] [2022-04-06 14:36:43,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:43,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:43,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:43,532 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:43,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 14:36:43,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-06 14:36:43,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:43,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 14:36:43,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:43,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:44,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812531940] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:44,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:44,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 14:36:44,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:44,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [361126889] [2022-04-06 14:36:44,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [361126889] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:44,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:44,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 14:36:44,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351824023] [2022-04-06 14:36:44,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:44,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 14:36:44,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 14:36:44,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1390, Invalid=1916, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 14:36:44,245 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:44,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:44,629 INFO L93 Difference]: Finished difference Result 153 states and 179 transitions. [2022-04-06 14:36:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 14:36:44,630 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 14:36:44,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:44,630 INFO L225 Difference]: With dead ends: 153 [2022-04-06 14:36:44,630 INFO L226 Difference]: Without dead ends: 147 [2022-04-06 14:36:44,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2726, Invalid=4414, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 14:36:44,632 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 330 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:44,632 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 45 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-06 14:36:44,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2022-04-06 14:36:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 135 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2022-04-06 14:36:44,657 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 65 [2022-04-06 14:36:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:44,657 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2022-04-06 14:36:44,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:44,657 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2022-04-06 14:36:44,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 14:36:44,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:44,658 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:44,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 14:36:44,873 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,SelfDestructingSolverStorable25 [2022-04-06 14:36:44,874 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:44,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash 971106620, now seen corresponding path program 49 times [2022-04-06 14:36:44,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:44,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610035847] [2022-04-06 14:36:44,874 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash 971106620, now seen corresponding path program 50 times [2022-04-06 14:36:44,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:44,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60294115] [2022-04-06 14:36:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:44,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:45,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:45,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:45,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60294115] [2022-04-06 14:36:45,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60294115] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:45,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012089856] [2022-04-06 14:36:45,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:45,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:45,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:45,183 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:45,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 14:36:45,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:45,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:45,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 14:36:45,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:45,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:46,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012089856] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:46,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:46,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 14:36:46,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:46,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610035847] [2022-04-06 14:36:46,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610035847] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:46,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:46,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 14:36:46,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418049146] [2022-04-06 14:36:46,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:46,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 14:36:46,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:46,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 14:36:46,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2043, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 14:36:46,051 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:46,605 INFO L93 Difference]: Finished difference Result 158 states and 185 transitions. [2022-04-06 14:36:46,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 14:36:46,606 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 14:36:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:46,606 INFO L225 Difference]: With dead ends: 158 [2022-04-06 14:36:46,606 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 14:36:46,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2938, Invalid=4718, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 14:36:46,607 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 337 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:46,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 40 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:36:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 14:36:46,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2022-04-06 14:36:46,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 140 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2022-04-06 14:36:46,666 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 67 [2022-04-06 14:36:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:46,666 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2022-04-06 14:36:46,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:46,666 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2022-04-06 14:36:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 14:36:46,667 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:46,667 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:46,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:46,883 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,SelfDestructingSolverStorable26 [2022-04-06 14:36:46,883 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:46,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:46,883 INFO L85 PathProgramCache]: Analyzing trace with hash 867062775, now seen corresponding path program 51 times [2022-04-06 14:36:46,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:46,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190055576] [2022-04-06 14:36:46,884 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:46,884 INFO L85 PathProgramCache]: Analyzing trace with hash 867062775, now seen corresponding path program 52 times [2022-04-06 14:36:46,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:46,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087412081] [2022-04-06 14:36:46,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:46,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:47,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:47,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:47,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087412081] [2022-04-06 14:36:47,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087412081] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:47,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358976098] [2022-04-06 14:36:47,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:47,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:47,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:47,180 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:47,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 14:36:47,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:47,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:47,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 14:36:47,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:47,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:48,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358976098] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:48,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:48,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 14:36:48,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:48,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190055576] [2022-04-06 14:36:48,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190055576] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:48,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:48,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 14:36:48,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619670804] [2022-04-06 14:36:48,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:48,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 14:36:48,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:48,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 14:36:48,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1608, Invalid=2174, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 14:36:48,092 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:48,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:48,769 INFO L93 Difference]: Finished difference Result 163 states and 191 transitions. [2022-04-06 14:36:48,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 14:36:48,769 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 14:36:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:48,770 INFO L225 Difference]: With dead ends: 163 [2022-04-06 14:36:48,770 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 14:36:48,771 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3158, Invalid=5032, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 14:36:48,771 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 326 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:48,771 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 55 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:36:48,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 14:36:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 150. [2022-04-06 14:36:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.193103448275862) internal successors, (173), 145 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2022-04-06 14:36:48,800 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 69 [2022-04-06 14:36:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:48,800 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2022-04-06 14:36:48,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2022-04-06 14:36:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 14:36:48,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:48,800 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:48,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:49,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 14:36:49,017 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash -334824462, now seen corresponding path program 53 times [2022-04-06 14:36:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:49,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499345009] [2022-04-06 14:36:49,017 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash -334824462, now seen corresponding path program 54 times [2022-04-06 14:36:49,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:49,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815281293] [2022-04-06 14:36:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:49,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:49,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:49,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:49,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815281293] [2022-04-06 14:36:49,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815281293] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:49,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363384575] [2022-04-06 14:36:49,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:49,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:49,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:49,351 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:49,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 14:36:49,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-04-06 14:36:49,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:49,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 14:36:49,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:49,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:50,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363384575] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:50,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:50,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 14:36:50,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:50,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499345009] [2022-04-06 14:36:50,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499345009] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:50,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:50,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 14:36:50,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738366020] [2022-04-06 14:36:50,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:50,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 14:36:50,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:50,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 14:36:50,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1723, Invalid=2309, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 14:36:50,426 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:50,994 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2022-04-06 14:36:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 14:36:50,995 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-04-06 14:36:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:50,995 INFO L225 Difference]: With dead ends: 168 [2022-04-06 14:36:50,996 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 14:36:50,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3386, Invalid=5356, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 14:36:51,002 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 339 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:51,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 55 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:36:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 14:36:51,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2022-04-06 14:36:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 150 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2022-04-06 14:36:51,042 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 71 [2022-04-06 14:36:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:51,043 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2022-04-06 14:36:51,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 31 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2022-04-06 14:36:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 14:36:51,043 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:51,043 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:51,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:51,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 14:36:51,244 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:51,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2256595, now seen corresponding path program 55 times [2022-04-06 14:36:51,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:51,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [701819375] [2022-04-06 14:36:51,245 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:51,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2256595, now seen corresponding path program 56 times [2022-04-06 14:36:51,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:51,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360200346] [2022-04-06 14:36:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:51,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:51,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:51,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:51,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360200346] [2022-04-06 14:36:51,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360200346] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:51,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069897405] [2022-04-06 14:36:51,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:51,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:51,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:51,481 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:51,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 14:36:51,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:51,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:51,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 14:36:51,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:51,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:52,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069897405] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:52,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:52,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 14:36:52,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:52,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [701819375] [2022-04-06 14:36:52,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [701819375] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:52,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:52,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 14:36:52,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590193864] [2022-04-06 14:36:52,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:52,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 14:36:52,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:52,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 14:36:52,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1842, Invalid=2448, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 14:36:52,346 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:52,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:52,884 INFO L93 Difference]: Finished difference Result 173 states and 203 transitions. [2022-04-06 14:36:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 14:36:52,885 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 14:36:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:52,885 INFO L225 Difference]: With dead ends: 173 [2022-04-06 14:36:52,886 INFO L226 Difference]: Without dead ends: 167 [2022-04-06 14:36:52,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3622, Invalid=5690, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 14:36:52,886 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 379 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:52,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 50 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:36:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-06 14:36:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2022-04-06 14:36:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.1935483870967742) internal successors, (185), 155 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 189 transitions. [2022-04-06 14:36:52,919 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 189 transitions. Word has length 73 [2022-04-06 14:36:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:52,919 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 189 transitions. [2022-04-06 14:36:52,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 32 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 189 transitions. [2022-04-06 14:36:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 14:36:52,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:52,920 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:52,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:53,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:53,136 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:53,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:53,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1767883688, now seen corresponding path program 57 times [2022-04-06 14:36:53,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:53,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1055017106] [2022-04-06 14:36:53,137 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:53,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1767883688, now seen corresponding path program 58 times [2022-04-06 14:36:53,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:53,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830049553] [2022-04-06 14:36:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:53,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:53,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:53,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:53,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830049553] [2022-04-06 14:36:53,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830049553] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:53,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156457329] [2022-04-06 14:36:53,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:36:53,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:53,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:53,445 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:53,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 14:36:53,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:36:53,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:53,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 14:36:53,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:53,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:54,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156457329] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:54,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:54,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 14:36:54,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:54,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1055017106] [2022-04-06 14:36:54,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1055017106] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:54,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:54,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 14:36:54,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718588469] [2022-04-06 14:36:54,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:54,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 14:36:54,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:54,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 14:36:54,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1965, Invalid=2591, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 14:36:54,603 INFO L87 Difference]: Start difference. First operand 160 states and 189 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:55,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:55,307 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2022-04-06 14:36:55,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 14:36:55,307 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-04-06 14:36:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:55,308 INFO L225 Difference]: With dead ends: 178 [2022-04-06 14:36:55,308 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 14:36:55,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3866, Invalid=6034, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 14:36:55,309 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 371 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:55,310 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 60 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:36:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 14:36:55,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2022-04-06 14:36:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.19375) internal successors, (191), 160 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 195 transitions. [2022-04-06 14:36:55,344 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 195 transitions. Word has length 75 [2022-04-06 14:36:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:55,344 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 195 transitions. [2022-04-06 14:36:55,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 195 transitions. [2022-04-06 14:36:55,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 14:36:55,345 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:55,345 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:55,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:55,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:55,560 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:55,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2065646435, now seen corresponding path program 59 times [2022-04-06 14:36:55,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:55,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945824152] [2022-04-06 14:36:55,561 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:55,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2065646435, now seen corresponding path program 60 times [2022-04-06 14:36:55,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:55,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672038568] [2022-04-06 14:36:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:55,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:55,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:55,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:55,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672038568] [2022-04-06 14:36:55,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672038568] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:55,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86959813] [2022-04-06 14:36:55,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:36:55,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:55,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:55,953 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:55,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 14:36:56,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-04-06 14:36:56,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:56,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 14:36:56,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:56,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:57,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86959813] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:57,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:57,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 14:36:57,178 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:57,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945824152] [2022-04-06 14:36:57,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945824152] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:57,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:57,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 14:36:57,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25692695] [2022-04-06 14:36:57,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:57,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 14:36:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:57,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 14:36:57,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2092, Invalid=2738, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 14:36:57,179 INFO L87 Difference]: Start difference. First operand 165 states and 195 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:57,807 INFO L93 Difference]: Finished difference Result 183 states and 215 transitions. [2022-04-06 14:36:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 14:36:57,807 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-04-06 14:36:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:57,808 INFO L225 Difference]: With dead ends: 183 [2022-04-06 14:36:57,808 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 14:36:57,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4118, Invalid=6388, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 14:36:57,809 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 441 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:57,809 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 35 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:36:57,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 14:36:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2022-04-06 14:36:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.1939393939393939) internal successors, (197), 165 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:57,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 201 transitions. [2022-04-06 14:36:57,845 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 201 transitions. Word has length 77 [2022-04-06 14:36:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:36:57,845 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 201 transitions. [2022-04-06 14:36:57,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 34 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 201 transitions. [2022-04-06 14:36:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 14:36:57,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:36:57,846 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:36:57,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 14:36:58,062 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,SelfDestructingSolverStorable31 [2022-04-06 14:36:58,062 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:36:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:36:58,062 INFO L85 PathProgramCache]: Analyzing trace with hash 452837470, now seen corresponding path program 61 times [2022-04-06 14:36:58,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:58,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1197828736] [2022-04-06 14:36:58,063 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:36:58,063 INFO L85 PathProgramCache]: Analyzing trace with hash 452837470, now seen corresponding path program 62 times [2022-04-06 14:36:58,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:36:58,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378504927] [2022-04-06 14:36:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:36:58,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:36:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:58,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:36:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:36:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:58,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:36:58,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378504927] [2022-04-06 14:36:58,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378504927] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:36:58,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24204718] [2022-04-06 14:36:58,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:36:58,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:36:58,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:36:58,390 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:36:58,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 14:36:58,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:36:58,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:36:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 14:36:58,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:36:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:58,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:36:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:36:59,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24204718] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:36:59,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:36:59,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 14:36:59,259 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:36:59,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1197828736] [2022-04-06 14:36:59,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1197828736] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:36:59,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:36:59,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 14:36:59,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675812409] [2022-04-06 14:36:59,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:36:59,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 14:36:59,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:36:59,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 14:36:59,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2223, Invalid=2889, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 14:36:59,260 INFO L87 Difference]: Start difference. First operand 170 states and 201 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:36:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:36:59,966 INFO L93 Difference]: Finished difference Result 188 states and 221 transitions. [2022-04-06 14:36:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 14:36:59,966 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-04-06 14:36:59,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:36:59,967 INFO L225 Difference]: With dead ends: 188 [2022-04-06 14:36:59,967 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 14:36:59,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4378, Invalid=6752, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 14:36:59,969 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 400 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:36:59,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 60 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:36:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 14:37:00,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2022-04-06 14:37:00,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.1941176470588235) internal successors, (203), 170 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 207 transitions. [2022-04-06 14:37:00,023 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 207 transitions. Word has length 79 [2022-04-06 14:37:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:00,024 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 207 transitions. [2022-04-06 14:37:00,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 35 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 207 transitions. [2022-04-06 14:37:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 14:37:00,024 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:00,024 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:00,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:00,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:00,240 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:00,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1026615961, now seen corresponding path program 63 times [2022-04-06 14:37:00,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:00,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [660823371] [2022-04-06 14:37:00,241 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1026615961, now seen corresponding path program 64 times [2022-04-06 14:37:00,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:00,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127354274] [2022-04-06 14:37:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:00,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:00,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:00,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:00,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127354274] [2022-04-06 14:37:00,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127354274] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:00,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784649188] [2022-04-06 14:37:00,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:37:00,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:00,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:00,677 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:00,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 14:37:00,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:37:00,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:00,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 14:37:00,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:00,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:02,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784649188] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:02,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:02,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 14:37:02,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:02,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [660823371] [2022-04-06 14:37:02,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [660823371] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:02,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:02,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 14:37:02,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524202463] [2022-04-06 14:37:02,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:02,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 14:37:02,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 14:37:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2358, Invalid=3044, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 14:37:02,023 INFO L87 Difference]: Start difference. First operand 175 states and 207 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:02,589 INFO L93 Difference]: Finished difference Result 193 states and 227 transitions. [2022-04-06 14:37:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 14:37:02,589 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 14:37:02,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:02,590 INFO L225 Difference]: With dead ends: 193 [2022-04-06 14:37:02,590 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 14:37:02,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4646, Invalid=7126, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 14:37:02,591 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 509 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:02,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 40 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:02,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 14:37:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 180. [2022-04-06 14:37:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.1942857142857144) internal successors, (209), 175 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 213 transitions. [2022-04-06 14:37:02,631 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 213 transitions. Word has length 81 [2022-04-06 14:37:02,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:02,632 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 213 transitions. [2022-04-06 14:37:02,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 36 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 213 transitions. [2022-04-06 14:37:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 14:37:02,632 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:02,632 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:02,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:02,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:02,848 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:02,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:02,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1623035372, now seen corresponding path program 65 times [2022-04-06 14:37:02,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:02,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [931394489] [2022-04-06 14:37:02,849 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:02,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1623035372, now seen corresponding path program 66 times [2022-04-06 14:37:02,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:02,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903470146] [2022-04-06 14:37:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:02,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:03,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:03,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903470146] [2022-04-06 14:37:03,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903470146] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651513963] [2022-04-06 14:37:03,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:37:03,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:03,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:03,329 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:03,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 14:37:03,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-04-06 14:37:03,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:03,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 14:37:03,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:03,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:04,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651513963] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:04,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:04,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 14:37:04,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:04,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [931394489] [2022-04-06 14:37:04,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [931394489] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:04,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:04,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 14:37:04,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011989742] [2022-04-06 14:37:04,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:04,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 14:37:04,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 14:37:04,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2497, Invalid=3203, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 14:37:04,524 INFO L87 Difference]: Start difference. First operand 180 states and 213 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:05,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:05,246 INFO L93 Difference]: Finished difference Result 198 states and 233 transitions. [2022-04-06 14:37:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 14:37:05,246 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 14:37:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:05,247 INFO L225 Difference]: With dead ends: 198 [2022-04-06 14:37:05,247 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 14:37:05,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4922, Invalid=7510, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 14:37:05,248 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 525 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:05,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 50 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 14:37:05,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 185. [2022-04-06 14:37:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.1944444444444444) internal successors, (215), 180 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 219 transitions. [2022-04-06 14:37:05,291 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 219 transitions. Word has length 83 [2022-04-06 14:37:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:05,291 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 219 transitions. [2022-04-06 14:37:05,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 219 transitions. [2022-04-06 14:37:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 14:37:05,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:05,292 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:05,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 14:37:05,507 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,SelfDestructingSolverStorable34 [2022-04-06 14:37:05,508 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:05,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:05,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1022359857, now seen corresponding path program 67 times [2022-04-06 14:37:05,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:05,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [319823661] [2022-04-06 14:37:05,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:05,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1022359857, now seen corresponding path program 68 times [2022-04-06 14:37:05,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:05,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076677894] [2022-04-06 14:37:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:05,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:05,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:06,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:06,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076677894] [2022-04-06 14:37:06,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076677894] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:06,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643743416] [2022-04-06 14:37:06,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:37:06,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:06,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:06,002 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:06,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 14:37:06,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:37:06,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:06,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 14:37:06,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:06,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:07,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643743416] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:07,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:07,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 14:37:07,311 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:07,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [319823661] [2022-04-06 14:37:07,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [319823661] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:07,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:07,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 14:37:07,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053410136] [2022-04-06 14:37:07,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:07,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 14:37:07,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:07,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 14:37:07,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2640, Invalid=3366, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 14:37:07,313 INFO L87 Difference]: Start difference. First operand 185 states and 219 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:07,940 INFO L93 Difference]: Finished difference Result 203 states and 239 transitions. [2022-04-06 14:37:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 14:37:07,940 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-04-06 14:37:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:07,941 INFO L225 Difference]: With dead ends: 203 [2022-04-06 14:37:07,941 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 14:37:07,942 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5206, Invalid=7904, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 14:37:07,942 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 664 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:07,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 35 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 14:37:07,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2022-04-06 14:37:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.1945945945945946) internal successors, (221), 185 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:07,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 225 transitions. [2022-04-06 14:37:07,987 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 225 transitions. Word has length 85 [2022-04-06 14:37:07,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:07,987 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 225 transitions. [2022-04-06 14:37:07,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 38 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:07,987 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 225 transitions. [2022-04-06 14:37:07,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 14:37:07,988 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:07,988 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:08,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:08,203 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,SelfDestructingSolverStorable35 [2022-04-06 14:37:08,204 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash 701192394, now seen corresponding path program 69 times [2022-04-06 14:37:08,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:08,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [885532981] [2022-04-06 14:37:08,204 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash 701192394, now seen corresponding path program 70 times [2022-04-06 14:37:08,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:08,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139827039] [2022-04-06 14:37:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:08,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:08,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:08,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:08,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139827039] [2022-04-06 14:37:08,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139827039] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:08,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729084755] [2022-04-06 14:37:08,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:37:08,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:08,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:08,643 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:08,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 14:37:08,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:37:08,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:08,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 14:37:08,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:08,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:09,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729084755] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:09,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:09,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-04-06 14:37:09,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:09,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [885532981] [2022-04-06 14:37:09,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [885532981] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:09,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:09,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 14:37:09,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633985207] [2022-04-06 14:37:09,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:09,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 14:37:09,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:09,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 14:37:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2787, Invalid=3533, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 14:37:09,635 INFO L87 Difference]: Start difference. First operand 190 states and 225 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:10,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:10,272 INFO L93 Difference]: Finished difference Result 208 states and 245 transitions. [2022-04-06 14:37:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 14:37:10,272 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-04-06 14:37:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:10,275 INFO L225 Difference]: With dead ends: 208 [2022-04-06 14:37:10,276 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 14:37:10,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5498, Invalid=8308, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 14:37:10,277 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 533 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:10,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 55 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:37:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 14:37:10,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2022-04-06 14:37:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.194736842105263) internal successors, (227), 190 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 231 transitions. [2022-04-06 14:37:10,345 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 231 transitions. Word has length 87 [2022-04-06 14:37:10,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:10,345 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 231 transitions. [2022-04-06 14:37:10,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 39 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:10,345 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 231 transitions. [2022-04-06 14:37:10,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 14:37:10,346 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:10,346 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:10,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:10,562 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,SelfDestructingSolverStorable36 [2022-04-06 14:37:10,562 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:10,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash -822470651, now seen corresponding path program 71 times [2022-04-06 14:37:10,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:10,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [241251708] [2022-04-06 14:37:10,563 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash -822470651, now seen corresponding path program 72 times [2022-04-06 14:37:10,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:10,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558863245] [2022-04-06 14:37:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:10,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:10,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:10,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:10,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558863245] [2022-04-06 14:37:10,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558863245] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:10,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15759898] [2022-04-06 14:37:10,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:37:10,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:10,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:10,891 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:10,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 14:37:10,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-04-06 14:37:10,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:10,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 14:37:10,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:11,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:12,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15759898] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:12,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:12,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 14:37:12,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:12,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [241251708] [2022-04-06 14:37:12,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [241251708] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:12,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:12,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 14:37:12,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632321620] [2022-04-06 14:37:12,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:12,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 14:37:12,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:12,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 14:37:12,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2938, Invalid=3704, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 14:37:12,059 INFO L87 Difference]: Start difference. First operand 195 states and 231 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:12,694 INFO L93 Difference]: Finished difference Result 213 states and 251 transitions. [2022-04-06 14:37:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 14:37:12,694 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 14:37:12,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:12,707 INFO L225 Difference]: With dead ends: 213 [2022-04-06 14:37:12,707 INFO L226 Difference]: Without dead ends: 207 [2022-04-06 14:37:12,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5798, Invalid=8722, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 14:37:12,709 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 453 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:12,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 55 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:37:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-04-06 14:37:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 200. [2022-04-06 14:37:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 195 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 237 transitions. [2022-04-06 14:37:12,758 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 237 transitions. Word has length 89 [2022-04-06 14:37:12,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:12,759 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 237 transitions. [2022-04-06 14:37:12,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 40 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:12,759 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 237 transitions. [2022-04-06 14:37:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 14:37:12,759 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:12,759 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:12,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 14:37:12,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:12,975 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:12,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:12,975 INFO L85 PathProgramCache]: Analyzing trace with hash -478808960, now seen corresponding path program 73 times [2022-04-06 14:37:12,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:12,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1178652698] [2022-04-06 14:37:12,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash -478808960, now seen corresponding path program 74 times [2022-04-06 14:37:12,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:12,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338470966] [2022-04-06 14:37:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:12,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:13,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:13,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:13,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338470966] [2022-04-06 14:37:13,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338470966] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:13,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357676948] [2022-04-06 14:37:13,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:37:13,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:13,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:13,539 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:13,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 14:37:13,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:37:13,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 14:37:13,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:13,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:14,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357676948] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:14,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:14,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 14:37:14,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:14,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1178652698] [2022-04-06 14:37:14,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1178652698] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:14,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:14,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 14:37:14,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467667292] [2022-04-06 14:37:14,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:14,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 14:37:14,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 14:37:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3093, Invalid=3879, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 14:37:14,693 INFO L87 Difference]: Start difference. First operand 200 states and 237 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:15,600 INFO L93 Difference]: Finished difference Result 218 states and 257 transitions. [2022-04-06 14:37:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 14:37:15,600 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-04-06 14:37:15,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:15,601 INFO L225 Difference]: With dead ends: 218 [2022-04-06 14:37:15,601 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 14:37:15,603 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6106, Invalid=9146, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 14:37:15,603 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 553 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:15,603 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 40 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:15,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 14:37:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 205. [2022-04-06 14:37:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.195) internal successors, (239), 200 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 243 transitions. [2022-04-06 14:37:15,668 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 243 transitions. Word has length 91 [2022-04-06 14:37:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:15,668 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 243 transitions. [2022-04-06 14:37:15,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 243 transitions. [2022-04-06 14:37:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:37:15,669 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:15,670 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:15,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 14:37:15,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 14:37:15,882 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:15,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:15,883 INFO L85 PathProgramCache]: Analyzing trace with hash -932405701, now seen corresponding path program 75 times [2022-04-06 14:37:15,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:15,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1839406897] [2022-04-06 14:37:15,883 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:15,883 INFO L85 PathProgramCache]: Analyzing trace with hash -932405701, now seen corresponding path program 76 times [2022-04-06 14:37:15,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:15,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667289548] [2022-04-06 14:37:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:15,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:16,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:16,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:16,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667289548] [2022-04-06 14:37:16,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667289548] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:16,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051290987] [2022-04-06 14:37:16,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:37:16,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:16,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:16,435 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:16,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 14:37:16,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:37:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:16,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 14:37:16,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:16,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:18,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051290987] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:18,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:18,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 14:37:18,251 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:18,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1839406897] [2022-04-06 14:37:18,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1839406897] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:18,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:18,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 14:37:18,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795676783] [2022-04-06 14:37:18,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:18,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 14:37:18,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:18,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 14:37:18,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3252, Invalid=4058, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 14:37:18,252 INFO L87 Difference]: Start difference. First operand 205 states and 243 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:19,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:19,176 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2022-04-06 14:37:19,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 14:37:19,176 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 14:37:19,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:19,183 INFO L225 Difference]: With dead ends: 223 [2022-04-06 14:37:19,184 INFO L226 Difference]: Without dead ends: 217 [2022-04-06 14:37:19,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6422, Invalid=9580, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 14:37:19,187 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 515 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:19,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 50 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-04-06 14:37:19,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 210. [2022-04-06 14:37:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.1951219512195121) internal successors, (245), 205 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:19,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2022-04-06 14:37:19,242 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 93 [2022-04-06 14:37:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:19,242 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2022-04-06 14:37:19,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 42 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2022-04-06 14:37:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 14:37:19,243 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:19,243 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:19,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:19,457 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,SelfDestructingSolverStorable39 [2022-04-06 14:37:19,458 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:19,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:19,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1247790390, now seen corresponding path program 77 times [2022-04-06 14:37:19,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:19,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [261615382] [2022-04-06 14:37:19,458 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:19,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1247790390, now seen corresponding path program 78 times [2022-04-06 14:37:19,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:19,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191361832] [2022-04-06 14:37:19,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:19,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:19,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:19,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:19,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191361832] [2022-04-06 14:37:19,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191361832] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:19,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379136699] [2022-04-06 14:37:19,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:37:19,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:19,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:19,963 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:19,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 14:37:20,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-04-06 14:37:20,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:20,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 14:37:20,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:20,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:21,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379136699] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:21,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:21,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-04-06 14:37:21,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:21,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [261615382] [2022-04-06 14:37:21,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [261615382] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:21,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:21,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 14:37:21,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672315175] [2022-04-06 14:37:21,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:21,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 14:37:21,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 14:37:21,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3415, Invalid=4241, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 14:37:21,301 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:22,105 INFO L93 Difference]: Finished difference Result 228 states and 269 transitions. [2022-04-06 14:37:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 14:37:22,105 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-04-06 14:37:22,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:22,112 INFO L225 Difference]: With dead ends: 228 [2022-04-06 14:37:22,112 INFO L226 Difference]: Without dead ends: 222 [2022-04-06 14:37:22,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6746, Invalid=10024, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 14:37:22,114 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 471 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:22,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 65 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:22,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-06 14:37:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2022-04-06 14:37:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.1952380952380952) internal successors, (251), 210 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 255 transitions. [2022-04-06 14:37:22,183 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 255 transitions. Word has length 95 [2022-04-06 14:37:22,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:22,183 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 255 transitions. [2022-04-06 14:37:22,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 43 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:22,183 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 255 transitions. [2022-04-06 14:37:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 14:37:22,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:22,184 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:22,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:22,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:22,399 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash 472193393, now seen corresponding path program 79 times [2022-04-06 14:37:22,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:22,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390806760] [2022-04-06 14:37:22,400 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash 472193393, now seen corresponding path program 80 times [2022-04-06 14:37:22,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:22,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536344923] [2022-04-06 14:37:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:22,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:22,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:22,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:22,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536344923] [2022-04-06 14:37:22,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536344923] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:22,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517537333] [2022-04-06 14:37:22,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:37:22,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:22,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:22,965 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:22,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 14:37:23,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:37:23,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:23,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 14:37:23,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:23,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:24,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517537333] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:24,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:24,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 14:37:24,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:24,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390806760] [2022-04-06 14:37:24,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390806760] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:24,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:24,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 14:37:24,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339409024] [2022-04-06 14:37:24,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:24,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 14:37:24,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:24,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 14:37:24,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3582, Invalid=4428, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 14:37:24,426 INFO L87 Difference]: Start difference. First operand 215 states and 255 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:25,507 INFO L93 Difference]: Finished difference Result 233 states and 275 transitions. [2022-04-06 14:37:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 14:37:25,507 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-04-06 14:37:25,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:25,508 INFO L225 Difference]: With dead ends: 233 [2022-04-06 14:37:25,508 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 14:37:25,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7078, Invalid=10478, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 14:37:25,510 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 583 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:25,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 40 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 14:37:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2022-04-06 14:37:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.1953488372093024) internal successors, (257), 215 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 261 transitions. [2022-04-06 14:37:25,570 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 261 transitions. Word has length 97 [2022-04-06 14:37:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:25,570 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 261 transitions. [2022-04-06 14:37:25,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 44 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 261 transitions. [2022-04-06 14:37:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 14:37:25,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:25,571 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:25,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 14:37:25,787 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,SelfDestructingSolverStorable41 [2022-04-06 14:37:25,787 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:25,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1847178516, now seen corresponding path program 81 times [2022-04-06 14:37:25,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:25,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1657874583] [2022-04-06 14:37:25,788 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:25,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1847178516, now seen corresponding path program 82 times [2022-04-06 14:37:25,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:25,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745910044] [2022-04-06 14:37:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:25,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:26,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:26,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:26,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745910044] [2022-04-06 14:37:26,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745910044] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:26,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776617525] [2022-04-06 14:37:26,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:37:26,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:26,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:26,428 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:26,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 14:37:26,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:37:26,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:26,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 14:37:26,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:26,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:28,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776617525] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:28,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:28,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 14:37:28,029 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:28,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1657874583] [2022-04-06 14:37:28,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1657874583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:28,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:28,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 14:37:28,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129501703] [2022-04-06 14:37:28,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:28,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 14:37:28,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:28,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 14:37:28,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3753, Invalid=4619, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 14:37:28,032 INFO L87 Difference]: Start difference. First operand 220 states and 261 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:28,882 INFO L93 Difference]: Finished difference Result 238 states and 281 transitions. [2022-04-06 14:37:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 14:37:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-04-06 14:37:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:28,883 INFO L225 Difference]: With dead ends: 238 [2022-04-06 14:37:28,883 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 14:37:28,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7418, Invalid=10942, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 14:37:28,889 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 572 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:28,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 60 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 14:37:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2022-04-06 14:37:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.1954545454545455) internal successors, (263), 220 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 267 transitions. [2022-04-06 14:37:28,953 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 267 transitions. Word has length 99 [2022-04-06 14:37:28,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:28,953 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 267 transitions. [2022-04-06 14:37:28,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 267 transitions. [2022-04-06 14:37:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 14:37:28,954 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:28,954 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:28,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 14:37:29,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:29,170 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:29,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1675556441, now seen corresponding path program 83 times [2022-04-06 14:37:29,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:29,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [161008266] [2022-04-06 14:37:29,171 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:29,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1675556441, now seen corresponding path program 84 times [2022-04-06 14:37:29,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:29,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558252897] [2022-04-06 14:37:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:29,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:29,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:29,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:29,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558252897] [2022-04-06 14:37:29,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558252897] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:29,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259840855] [2022-04-06 14:37:29,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:37:29,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:29,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:29,628 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:29,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 14:37:29,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-04-06 14:37:29,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 14:37:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:29,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:31,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259840855] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:31,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:31,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-04-06 14:37:31,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:31,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [161008266] [2022-04-06 14:37:31,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [161008266] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:31,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:31,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 14:37:31,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728326102] [2022-04-06 14:37:31,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:31,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 14:37:31,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:31,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 14:37:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3928, Invalid=4814, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 14:37:31,391 INFO L87 Difference]: Start difference. First operand 225 states and 267 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:32,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:32,223 INFO L93 Difference]: Finished difference Result 243 states and 287 transitions. [2022-04-06 14:37:32,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 14:37:32,223 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-04-06 14:37:32,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:32,224 INFO L225 Difference]: With dead ends: 243 [2022-04-06 14:37:32,224 INFO L226 Difference]: Without dead ends: 237 [2022-04-06 14:37:32,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7766, Invalid=11416, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 14:37:32,225 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 636 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:32,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 50 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-04-06 14:37:32,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-04-06 14:37:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.1955555555555555) internal successors, (269), 225 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 273 transitions. [2022-04-06 14:37:32,293 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 273 transitions. Word has length 101 [2022-04-06 14:37:32,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:32,293 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 273 transitions. [2022-04-06 14:37:32,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 46 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:32,293 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 273 transitions. [2022-04-06 14:37:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 14:37:32,294 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:32,294 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:32,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:32,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:32,510 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:32,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:32,511 INFO L85 PathProgramCache]: Analyzing trace with hash 44500386, now seen corresponding path program 85 times [2022-04-06 14:37:32,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:32,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1544486814] [2022-04-06 14:37:32,511 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:32,511 INFO L85 PathProgramCache]: Analyzing trace with hash 44500386, now seen corresponding path program 86 times [2022-04-06 14:37:32,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:32,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478356877] [2022-04-06 14:37:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:32,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:33,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:33,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478356877] [2022-04-06 14:37:33,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478356877] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563565198] [2022-04-06 14:37:33,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:37:33,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:33,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:33,211 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:33,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 14:37:33,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:37:33,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:33,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 14:37:33,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:33,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:34,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563565198] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:34,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:34,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-04-06 14:37:34,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:34,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1544486814] [2022-04-06 14:37:34,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1544486814] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:34,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:34,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 14:37:34,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704031554] [2022-04-06 14:37:34,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:34,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 14:37:34,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:34,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 14:37:34,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4107, Invalid=5013, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 14:37:34,669 INFO L87 Difference]: Start difference. First operand 230 states and 273 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:35,653 INFO L93 Difference]: Finished difference Result 248 states and 293 transitions. [2022-04-06 14:37:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 14:37:35,653 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-04-06 14:37:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:35,654 INFO L225 Difference]: With dead ends: 248 [2022-04-06 14:37:35,654 INFO L226 Difference]: Without dead ends: 242 [2022-04-06 14:37:35,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=8122, Invalid=11900, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 14:37:35,656 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 664 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:35,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 40 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-04-06 14:37:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 235. [2022-04-06 14:37:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.1956521739130435) internal successors, (275), 230 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 279 transitions. [2022-04-06 14:37:35,727 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 279 transitions. Word has length 103 [2022-04-06 14:37:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:35,728 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 279 transitions. [2022-04-06 14:37:35,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 47 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 279 transitions. [2022-04-06 14:37:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 14:37:35,728 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:35,728 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:35,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:35,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 14:37:35,942 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:35,942 INFO L85 PathProgramCache]: Analyzing trace with hash -543297827, now seen corresponding path program 87 times [2022-04-06 14:37:35,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:35,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1231415793] [2022-04-06 14:37:35,942 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:35,942 INFO L85 PathProgramCache]: Analyzing trace with hash -543297827, now seen corresponding path program 88 times [2022-04-06 14:37:35,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:35,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129816353] [2022-04-06 14:37:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:35,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:36,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:36,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:36,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129816353] [2022-04-06 14:37:36,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129816353] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:36,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757921402] [2022-04-06 14:37:36,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:37:36,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:36,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:36,411 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:36,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 14:37:36,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:37:36,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:36,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 14:37:36,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:36,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:38,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757921402] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:38,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:38,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-04-06 14:37:38,003 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:38,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1231415793] [2022-04-06 14:37:38,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1231415793] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:38,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:38,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 14:37:38,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265041720] [2022-04-06 14:37:38,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:38,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 14:37:38,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:38,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 14:37:38,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=5216, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 14:37:38,004 INFO L87 Difference]: Start difference. First operand 235 states and 279 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:38,907 INFO L93 Difference]: Finished difference Result 253 states and 299 transitions. [2022-04-06 14:37:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 14:37:38,907 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-04-06 14:37:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:38,908 INFO L225 Difference]: With dead ends: 253 [2022-04-06 14:37:38,908 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 14:37:38,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=8486, Invalid=12394, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 14:37:38,909 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 590 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:38,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 50 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:38,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 14:37:38,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 240. [2022-04-06 14:37:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.195744680851064) internal successors, (281), 235 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 285 transitions. [2022-04-06 14:37:38,982 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 285 transitions. Word has length 105 [2022-04-06 14:37:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:38,982 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 285 transitions. [2022-04-06 14:37:38,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 48 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 285 transitions. [2022-04-06 14:37:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 14:37:38,983 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:38,983 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:39,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:39,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 14:37:39,195 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:39,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:39,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1518302552, now seen corresponding path program 89 times [2022-04-06 14:37:39,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:39,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [155788651] [2022-04-06 14:37:39,196 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:39,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1518302552, now seen corresponding path program 90 times [2022-04-06 14:37:39,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:39,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504304787] [2022-04-06 14:37:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:39,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:39,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:39,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:39,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504304787] [2022-04-06 14:37:39,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504304787] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:39,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325481930] [2022-04-06 14:37:39,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:37:39,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:39,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:39,930 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:39,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 14:37:40,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-04-06 14:37:40,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:40,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 14:37:40,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:40,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:42,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325481930] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:42,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:42,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-04-06 14:37:42,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:42,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [155788651] [2022-04-06 14:37:42,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [155788651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:42,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:42,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 14:37:42,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810664949] [2022-04-06 14:37:42,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:42,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 14:37:42,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:42,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 14:37:42,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4477, Invalid=5423, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 14:37:42,325 INFO L87 Difference]: Start difference. First operand 240 states and 285 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:43,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:43,452 INFO L93 Difference]: Finished difference Result 258 states and 305 transitions. [2022-04-06 14:37:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 14:37:43,452 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-04-06 14:37:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:43,453 INFO L225 Difference]: With dead ends: 258 [2022-04-06 14:37:43,453 INFO L226 Difference]: Without dead ends: 252 [2022-04-06 14:37:43,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8858, Invalid=12898, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 14:37:43,454 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 621 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:43,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 45 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-04-06 14:37:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 245. [2022-04-06 14:37:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.1958333333333333) internal successors, (287), 240 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 291 transitions. [2022-04-06 14:37:43,529 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 291 transitions. Word has length 107 [2022-04-06 14:37:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:43,529 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 291 transitions. [2022-04-06 14:37:43,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 291 transitions. [2022-04-06 14:37:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 14:37:43,530 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:43,530 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:43,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 14:37:43,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 14:37:43,746 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:43,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:43,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1558623981, now seen corresponding path program 91 times [2022-04-06 14:37:43,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:43,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [70280973] [2022-04-06 14:37:43,747 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:43,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1558623981, now seen corresponding path program 92 times [2022-04-06 14:37:43,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:43,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585305729] [2022-04-06 14:37:43,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:43,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:44,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:44,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:44,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585305729] [2022-04-06 14:37:44,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585305729] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:44,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805741749] [2022-04-06 14:37:44,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:37:44,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:44,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:44,542 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:44,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 14:37:44,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:37:44,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:44,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 14:37:44,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:44,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:46,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805741749] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:46,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:46,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-06 14:37:46,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:46,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [70280973] [2022-04-06 14:37:46,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [70280973] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:46,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:46,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 14:37:46,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160840066] [2022-04-06 14:37:46,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:46,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 14:37:46,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:46,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 14:37:46,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=5634, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 14:37:46,672 INFO L87 Difference]: Start difference. First operand 245 states and 291 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:47,599 INFO L93 Difference]: Finished difference Result 263 states and 311 transitions. [2022-04-06 14:37:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 14:37:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-04-06 14:37:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:47,600 INFO L225 Difference]: With dead ends: 263 [2022-04-06 14:37:47,600 INFO L226 Difference]: Without dead ends: 257 [2022-04-06 14:37:47,601 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9238, Invalid=13412, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 14:37:47,601 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 634 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:47,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 35 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-04-06 14:37:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-04-06 14:37:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.1959183673469387) internal successors, (293), 245 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 297 transitions. [2022-04-06 14:37:47,684 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 297 transitions. Word has length 109 [2022-04-06 14:37:47,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:47,684 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 297 transitions. [2022-04-06 14:37:47,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 50 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 297 transitions. [2022-04-06 14:37:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 14:37:47,685 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:47,685 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:47,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-04-06 14:37:47,889 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:47,890 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:47,890 INFO L85 PathProgramCache]: Analyzing trace with hash 747444750, now seen corresponding path program 93 times [2022-04-06 14:37:47,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:47,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1229507124] [2022-04-06 14:37:47,890 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:47,890 INFO L85 PathProgramCache]: Analyzing trace with hash 747444750, now seen corresponding path program 94 times [2022-04-06 14:37:47,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:47,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487989388] [2022-04-06 14:37:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:47,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:48,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:48,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:48,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487989388] [2022-04-06 14:37:48,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487989388] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:48,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074726288] [2022-04-06 14:37:48,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:37:48,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:48,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:48,573 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:48,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 14:37:48,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:37:48,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:48,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 14:37:48,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:48,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:50,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074726288] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:50,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:50,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-04-06 14:37:50,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:50,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1229507124] [2022-04-06 14:37:50,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1229507124] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:50,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:50,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 14:37:50,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773679649] [2022-04-06 14:37:50,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:50,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 14:37:50,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:50,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 14:37:50,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4863, Invalid=5849, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 14:37:50,309 INFO L87 Difference]: Start difference. First operand 250 states and 297 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:51,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:51,512 INFO L93 Difference]: Finished difference Result 268 states and 317 transitions. [2022-04-06 14:37:51,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 14:37:51,513 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-04-06 14:37:51,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:51,513 INFO L225 Difference]: With dead ends: 268 [2022-04-06 14:37:51,514 INFO L226 Difference]: Without dead ends: 262 [2022-04-06 14:37:51,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9626, Invalid=13936, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 14:37:51,515 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 668 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:51,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 45 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:51,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-04-06 14:37:51,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 255. [2022-04-06 14:37:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.196) internal successors, (299), 250 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:51,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 303 transitions. [2022-04-06 14:37:51,607 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 303 transitions. Word has length 111 [2022-04-06 14:37:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:51,607 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 303 transitions. [2022-04-06 14:37:51,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 51 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 303 transitions. [2022-04-06 14:37:51,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 14:37:51,608 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:51,608 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:51,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:51,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 14:37:51,824 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:51,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:51,824 INFO L85 PathProgramCache]: Analyzing trace with hash 676370505, now seen corresponding path program 95 times [2022-04-06 14:37:51,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:51,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1423259956] [2022-04-06 14:37:51,825 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:51,825 INFO L85 PathProgramCache]: Analyzing trace with hash 676370505, now seen corresponding path program 96 times [2022-04-06 14:37:51,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:51,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450975152] [2022-04-06 14:37:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:51,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:52,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:52,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:52,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450975152] [2022-04-06 14:37:52,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450975152] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:52,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827028076] [2022-04-06 14:37:52,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:37:52,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:52,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:52,451 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:52,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 14:37:52,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-04-06 14:37:52,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:52,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 14:37:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:52,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:54,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827028076] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:54,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:54,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-04-06 14:37:54,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:54,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1423259956] [2022-04-06 14:37:54,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1423259956] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:54,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:54,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 14:37:54,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902312724] [2022-04-06 14:37:54,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:54,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 14:37:54,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:54,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 14:37:54,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5062, Invalid=6068, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 14:37:54,092 INFO L87 Difference]: Start difference. First operand 255 states and 303 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:55,117 INFO L93 Difference]: Finished difference Result 273 states and 323 transitions. [2022-04-06 14:37:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 14:37:55,117 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-04-06 14:37:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:55,118 INFO L225 Difference]: With dead ends: 273 [2022-04-06 14:37:55,118 INFO L226 Difference]: Without dead ends: 267 [2022-04-06 14:37:55,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=10022, Invalid=14470, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 14:37:55,123 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 696 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:55,123 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 50 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-04-06 14:37:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 260. [2022-04-06 14:37:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.196078431372549) internal successors, (305), 255 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:55,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 309 transitions. [2022-04-06 14:37:55,303 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 309 transitions. Word has length 113 [2022-04-06 14:37:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:55,303 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 309 transitions. [2022-04-06 14:37:55,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 309 transitions. [2022-04-06 14:37:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 14:37:55,310 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:55,310 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:55,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:55,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 14:37:55,530 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:55,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:55,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1093497796, now seen corresponding path program 97 times [2022-04-06 14:37:55,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:55,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [144243635] [2022-04-06 14:37:55,530 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:55,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1093497796, now seen corresponding path program 98 times [2022-04-06 14:37:55,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:55,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373593111] [2022-04-06 14:37:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:55,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:56,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:37:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:37:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:56,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:37:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373593111] [2022-04-06 14:37:56,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373593111] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:37:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557775170] [2022-04-06 14:37:56,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:37:56,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:56,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:37:56,134 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:37:56,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 14:37:56,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:37:56,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:37:56,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 14:37:56,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:37:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:56,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:37:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:37:58,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557775170] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:37:58,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:37:58,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-04-06 14:37:58,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:37:58,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [144243635] [2022-04-06 14:37:58,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [144243635] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:37:58,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:37:58,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 14:37:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893697758] [2022-04-06 14:37:58,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:37:58,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 14:37:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 14:37:58,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5265, Invalid=6291, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 14:37:58,513 INFO L87 Difference]: Start difference. First operand 260 states and 309 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:59,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:37:59,641 INFO L93 Difference]: Finished difference Result 278 states and 329 transitions. [2022-04-06 14:37:59,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 14:37:59,641 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-04-06 14:37:59,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:37:59,642 INFO L225 Difference]: With dead ends: 278 [2022-04-06 14:37:59,642 INFO L226 Difference]: Without dead ends: 272 [2022-04-06 14:37:59,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=10426, Invalid=15014, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 14:37:59,644 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 808 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:37:59,644 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 50 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:37:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-04-06 14:37:59,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 265. [2022-04-06 14:37:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.1961538461538461) internal successors, (311), 260 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:59,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 315 transitions. [2022-04-06 14:37:59,740 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 315 transitions. Word has length 115 [2022-04-06 14:37:59,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:37:59,740 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 315 transitions. [2022-04-06 14:37:59,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 53 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:37:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 315 transitions. [2022-04-06 14:37:59,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 14:37:59,741 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:37:59,741 INFO L499 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:37:59,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 14:37:59,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:37:59,957 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:37:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:37:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1774101377, now seen corresponding path program 99 times [2022-04-06 14:37:59,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:37:59,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [630457418] [2022-04-06 14:37:59,958 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:37:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1774101377, now seen corresponding path program 100 times [2022-04-06 14:37:59,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:37:59,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207218843] [2022-04-06 14:37:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:37:59,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:37:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:00,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:00,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:00,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207218843] [2022-04-06 14:38:00,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207218843] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:00,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533813189] [2022-04-06 14:38:00,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:38:00,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:00,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:00,863 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:00,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 14:38:00,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:38:00,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:00,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 14:38:00,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:01,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:02,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533813189] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:02,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:02,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-04-06 14:38:02,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:02,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [630457418] [2022-04-06 14:38:02,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [630457418] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:02,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:02,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 14:38:02,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737215087] [2022-04-06 14:38:02,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:02,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 14:38:02,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:02,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 14:38:02,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5472, Invalid=6518, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 14:38:02,794 INFO L87 Difference]: Start difference. First operand 265 states and 315 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:03,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:03,869 INFO L93 Difference]: Finished difference Result 283 states and 335 transitions. [2022-04-06 14:38:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 14:38:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-04-06 14:38:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:03,870 INFO L225 Difference]: With dead ends: 283 [2022-04-06 14:38:03,870 INFO L226 Difference]: Without dead ends: 277 [2022-04-06 14:38:03,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=10838, Invalid=15568, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 14:38:03,872 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 737 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:03,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 45 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:38:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-04-06 14:38:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 270. [2022-04-06 14:38:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.1962264150943396) internal successors, (317), 265 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 321 transitions. [2022-04-06 14:38:03,963 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 321 transitions. Word has length 117 [2022-04-06 14:38:03,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:03,963 INFO L478 AbstractCegarLoop]: Abstraction has 270 states and 321 transitions. [2022-04-06 14:38:03,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 54 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:03,963 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 321 transitions. [2022-04-06 14:38:03,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 14:38:03,964 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:03,964 INFO L499 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:03,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:04,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 14:38:04,176 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:04,176 INFO L85 PathProgramCache]: Analyzing trace with hash -167902598, now seen corresponding path program 101 times [2022-04-06 14:38:04,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:04,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [517953236] [2022-04-06 14:38:04,176 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:38:04,176 INFO L85 PathProgramCache]: Analyzing trace with hash -167902598, now seen corresponding path program 102 times [2022-04-06 14:38:04,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:04,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627712540] [2022-04-06 14:38:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:04,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:04,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:04,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:04,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627712540] [2022-04-06 14:38:04,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627712540] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:04,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933970186] [2022-04-06 14:38:04,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:38:04,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:04,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:04,942 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:04,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 14:38:05,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-04-06 14:38:05,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:05,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 14:38:05,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:05,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:06,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933970186] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:06,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:06,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-04-06 14:38:06,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:06,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [517953236] [2022-04-06 14:38:06,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [517953236] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:06,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:06,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 14:38:06,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725847012] [2022-04-06 14:38:06,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:06,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 14:38:06,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:06,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 14:38:06,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5683, Invalid=6749, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 14:38:06,718 INFO L87 Difference]: Start difference. First operand 270 states and 321 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:07,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:07,977 INFO L93 Difference]: Finished difference Result 288 states and 341 transitions. [2022-04-06 14:38:07,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 14:38:07,978 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-04-06 14:38:07,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:07,979 INFO L225 Difference]: With dead ends: 288 [2022-04-06 14:38:07,979 INFO L226 Difference]: Without dead ends: 282 [2022-04-06 14:38:07,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=11258, Invalid=16132, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 14:38:07,981 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 765 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:07,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 45 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:38:07,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-04-06 14:38:08,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 275. [2022-04-06 14:38:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.1962962962962962) internal successors, (323), 270 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 327 transitions. [2022-04-06 14:38:08,101 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 327 transitions. Word has length 119 [2022-04-06 14:38:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:08,101 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 327 transitions. [2022-04-06 14:38:08,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 55 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:08,101 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 327 transitions. [2022-04-06 14:38:08,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 14:38:08,102 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:08,102 INFO L499 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:08,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:08,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:08,302 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:08,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1495864757, now seen corresponding path program 103 times [2022-04-06 14:38:08,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:08,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1424771050] [2022-04-06 14:38:08,303 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:38:08,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1495864757, now seen corresponding path program 104 times [2022-04-06 14:38:08,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:08,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497639986] [2022-04-06 14:38:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:08,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:08,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:08,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:08,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497639986] [2022-04-06 14:38:08,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497639986] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:08,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725362722] [2022-04-06 14:38:08,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:38:08,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:08,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:08,893 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:08,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 14:38:08,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:38:08,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:08,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 14:38:08,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:09,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:10,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725362722] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:10,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:10,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-04-06 14:38:10,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:10,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1424771050] [2022-04-06 14:38:10,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1424771050] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:10,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:10,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 14:38:10,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483515716] [2022-04-06 14:38:10,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:10,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 14:38:10,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:10,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 14:38:10,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5898, Invalid=6984, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 14:38:10,750 INFO L87 Difference]: Start difference. First operand 275 states and 327 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:11,944 INFO L93 Difference]: Finished difference Result 293 states and 347 transitions. [2022-04-06 14:38:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 14:38:11,944 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-04-06 14:38:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:11,945 INFO L225 Difference]: With dead ends: 293 [2022-04-06 14:38:11,945 INFO L226 Difference]: Without dead ends: 287 [2022-04-06 14:38:11,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2382 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=11686, Invalid=16706, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 14:38:11,946 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 772 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:11,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 45 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:38:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-06 14:38:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 280. [2022-04-06 14:38:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.1963636363636363) internal successors, (329), 275 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 333 transitions. [2022-04-06 14:38:12,053 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 333 transitions. Word has length 121 [2022-04-06 14:38:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:12,054 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 333 transitions. [2022-04-06 14:38:12,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 56 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:12,054 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 333 transitions. [2022-04-06 14:38:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 14:38:12,076 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:12,076 INFO L499 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:12,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:12,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 14:38:12,292 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1646508496, now seen corresponding path program 105 times [2022-04-06 14:38:12,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:12,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [64336983] [2022-04-06 14:38:12,292 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:38:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1646508496, now seen corresponding path program 106 times [2022-04-06 14:38:12,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:12,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871752382] [2022-04-06 14:38:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:12,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:13,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:13,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871752382] [2022-04-06 14:38:13,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871752382] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979846222] [2022-04-06 14:38:13,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:38:13,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:13,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:13,172 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:13,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 14:38:13,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:38:13,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:13,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 14:38:13,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:13,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:16,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979846222] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:16,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:16,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-04-06 14:38:16,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:16,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [64336983] [2022-04-06 14:38:16,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [64336983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:16,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:16,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 14:38:16,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428415091] [2022-04-06 14:38:16,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:16,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 14:38:16,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:16,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 14:38:16,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6117, Invalid=7223, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 14:38:16,125 INFO L87 Difference]: Start difference. First operand 280 states and 333 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:17,951 INFO L93 Difference]: Finished difference Result 298 states and 353 transitions. [2022-04-06 14:38:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 14:38:17,951 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-04-06 14:38:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:17,952 INFO L225 Difference]: With dead ends: 298 [2022-04-06 14:38:17,952 INFO L226 Difference]: Without dead ends: 292 [2022-04-06 14:38:17,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12122, Invalid=17290, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 14:38:17,954 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 743 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:17,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 55 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:38:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-04-06 14:38:18,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 285. [2022-04-06 14:38:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.1964285714285714) internal successors, (335), 280 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 339 transitions. [2022-04-06 14:38:18,054 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 339 transitions. Word has length 123 [2022-04-06 14:38:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:18,055 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 339 transitions. [2022-04-06 14:38:18,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 57 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 339 transitions. [2022-04-06 14:38:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 14:38:18,055 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:18,055 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:18,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:18,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 14:38:18,271 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:18,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2105195541, now seen corresponding path program 107 times [2022-04-06 14:38:18,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:18,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [322488125] [2022-04-06 14:38:18,272 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:38:18,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2105195541, now seen corresponding path program 108 times [2022-04-06 14:38:18,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:18,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577678906] [2022-04-06 14:38:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:18,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:19,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:19,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577678906] [2022-04-06 14:38:19,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577678906] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782619640] [2022-04-06 14:38:19,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:38:19,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:19,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:19,111 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:19,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 14:38:19,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-04-06 14:38:19,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:19,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 14:38:19,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:19,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:21,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782619640] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:21,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:21,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-04-06 14:38:21,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:21,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [322488125] [2022-04-06 14:38:21,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [322488125] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:21,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:21,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 14:38:21,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912012901] [2022-04-06 14:38:21,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:21,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 14:38:21,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:21,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 14:38:21,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6340, Invalid=7466, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 14:38:21,807 INFO L87 Difference]: Start difference. First operand 285 states and 339 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:23,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:23,108 INFO L93 Difference]: Finished difference Result 303 states and 359 transitions. [2022-04-06 14:38:23,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 14:38:23,108 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-04-06 14:38:23,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:23,109 INFO L225 Difference]: With dead ends: 303 [2022-04-06 14:38:23,109 INFO L226 Difference]: Without dead ends: 297 [2022-04-06 14:38:23,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=12566, Invalid=17884, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 14:38:23,111 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 885 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:23,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 50 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:38:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-04-06 14:38:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 290. [2022-04-06 14:38:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.1964912280701754) internal successors, (341), 285 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 345 transitions. [2022-04-06 14:38:23,250 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 345 transitions. Word has length 125 [2022-04-06 14:38:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:23,251 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 345 transitions. [2022-04-06 14:38:23,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 58 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 345 transitions. [2022-04-06 14:38:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 14:38:23,251 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:23,251 INFO L499 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:23,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:23,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:23,467 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:23,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:23,467 INFO L85 PathProgramCache]: Analyzing trace with hash -521814298, now seen corresponding path program 109 times [2022-04-06 14:38:23,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:23,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [685421767] [2022-04-06 14:38:23,468 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:38:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash -521814298, now seen corresponding path program 110 times [2022-04-06 14:38:23,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:23,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452143587] [2022-04-06 14:38:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:23,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:24,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:24,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:24,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452143587] [2022-04-06 14:38:24,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452143587] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:24,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967822335] [2022-04-06 14:38:24,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:38:24,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:24,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:24,543 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:24,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 14:38:24,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:38:24,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:24,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 14:38:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:24,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:26,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967822335] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:26,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:26,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-04-06 14:38:26,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:26,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [685421767] [2022-04-06 14:38:26,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [685421767] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:26,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:26,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 14:38:26,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355009137] [2022-04-06 14:38:26,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:26,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 14:38:26,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:26,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 14:38:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6567, Invalid=7713, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 14:38:26,556 INFO L87 Difference]: Start difference. First operand 290 states and 345 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:27,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:27,889 INFO L93 Difference]: Finished difference Result 308 states and 365 transitions. [2022-04-06 14:38:27,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 14:38:27,890 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-04-06 14:38:27,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:27,891 INFO L225 Difference]: With dead ends: 308 [2022-04-06 14:38:27,891 INFO L226 Difference]: Without dead ends: 302 [2022-04-06 14:38:27,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=13018, Invalid=18488, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 14:38:27,892 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 736 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:27,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 65 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:38:27,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-04-06 14:38:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2022-04-06 14:38:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.196551724137931) internal successors, (347), 290 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 351 transitions. [2022-04-06 14:38:28,002 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 351 transitions. Word has length 127 [2022-04-06 14:38:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:28,002 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 351 transitions. [2022-04-06 14:38:28,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 59 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 351 transitions. [2022-04-06 14:38:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 14:38:28,003 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:28,003 INFO L499 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:28,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:28,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:28,219 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:28,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:28,220 INFO L85 PathProgramCache]: Analyzing trace with hash 689137441, now seen corresponding path program 111 times [2022-04-06 14:38:28,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:28,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [172974744] [2022-04-06 14:38:28,220 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:38:28,220 INFO L85 PathProgramCache]: Analyzing trace with hash 689137441, now seen corresponding path program 112 times [2022-04-06 14:38:28,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:28,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207428078] [2022-04-06 14:38:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:28,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:29,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:29,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:29,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207428078] [2022-04-06 14:38:29,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207428078] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:29,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961580132] [2022-04-06 14:38:29,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:38:29,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:29,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:29,156 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:29,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 14:38:29,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:38:29,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:29,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 14:38:29,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:29,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:31,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961580132] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:31,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:31,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-04-06 14:38:31,577 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:31,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [172974744] [2022-04-06 14:38:31,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [172974744] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:31,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:31,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 14:38:31,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536085480] [2022-04-06 14:38:31,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:31,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 14:38:31,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:31,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 14:38:31,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6798, Invalid=7964, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 14:38:31,579 INFO L87 Difference]: Start difference. First operand 295 states and 351 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:32,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:32,958 INFO L93 Difference]: Finished difference Result 313 states and 371 transitions. [2022-04-06 14:38:32,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 14:38:32,959 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-04-06 14:38:32,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:32,960 INFO L225 Difference]: With dead ends: 313 [2022-04-06 14:38:32,960 INFO L226 Difference]: Without dead ends: 307 [2022-04-06 14:38:32,961 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=13478, Invalid=19102, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 14:38:32,962 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 878 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:32,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 45 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:38:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-04-06 14:38:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2022-04-06 14:38:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.1966101694915254) internal successors, (353), 295 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 357 transitions. [2022-04-06 14:38:33,089 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 357 transitions. Word has length 129 [2022-04-06 14:38:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:33,089 INFO L478 AbstractCegarLoop]: Abstraction has 300 states and 357 transitions. [2022-04-06 14:38:33,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 60 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 357 transitions. [2022-04-06 14:38:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 14:38:33,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:33,090 INFO L499 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:33,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:33,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:33,305 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:33,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:33,306 INFO L85 PathProgramCache]: Analyzing trace with hash 477621404, now seen corresponding path program 113 times [2022-04-06 14:38:33,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:33,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [31602020] [2022-04-06 14:38:33,306 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:38:33,306 INFO L85 PathProgramCache]: Analyzing trace with hash 477621404, now seen corresponding path program 114 times [2022-04-06 14:38:33,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:33,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645524498] [2022-04-06 14:38:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:33,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:34,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:34,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:34,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645524498] [2022-04-06 14:38:34,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645524498] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:34,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094988649] [2022-04-06 14:38:34,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:38:34,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:34,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:34,202 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:34,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 14:38:34,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2022-04-06 14:38:34,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:34,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 14:38:34,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:34,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:36,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094988649] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:36,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:36,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-04-06 14:38:36,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:36,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [31602020] [2022-04-06 14:38:36,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [31602020] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:36,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:36,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 14:38:36,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754666004] [2022-04-06 14:38:36,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:36,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 14:38:36,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 14:38:36,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7033, Invalid=8219, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 14:38:36,874 INFO L87 Difference]: Start difference. First operand 300 states and 357 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:38,321 INFO L93 Difference]: Finished difference Result 318 states and 377 transitions. [2022-04-06 14:38:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 14:38:38,321 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-04-06 14:38:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:38,322 INFO L225 Difference]: With dead ends: 318 [2022-04-06 14:38:38,322 INFO L226 Difference]: Without dead ends: 312 [2022-04-06 14:38:38,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=13946, Invalid=19726, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 14:38:38,324 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 870 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:38,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 55 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:38:38,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-04-06 14:38:38,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 305. [2022-04-06 14:38:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.1966666666666668) internal successors, (359), 300 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 363 transitions. [2022-04-06 14:38:38,440 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 363 transitions. Word has length 131 [2022-04-06 14:38:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:38,440 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 363 transitions. [2022-04-06 14:38:38,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 61 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 363 transitions. [2022-04-06 14:38:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 14:38:38,441 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:38,441 INFO L499 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:38,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:38,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 14:38:38,657 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:38,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:38,658 INFO L85 PathProgramCache]: Analyzing trace with hash -925827241, now seen corresponding path program 115 times [2022-04-06 14:38:38,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:38,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1782721999] [2022-04-06 14:38:38,658 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:38:38,658 INFO L85 PathProgramCache]: Analyzing trace with hash -925827241, now seen corresponding path program 116 times [2022-04-06 14:38:38,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:38,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438488805] [2022-04-06 14:38:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:38,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:39,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:39,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:39,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438488805] [2022-04-06 14:38:39,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438488805] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:39,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884068876] [2022-04-06 14:38:39,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:38:39,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:39,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:39,794 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:39,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 14:38:39,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:38:39,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:39,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 14:38:39,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:40,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:43,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884068876] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:43,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:43,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-04-06 14:38:43,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:43,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1782721999] [2022-04-06 14:38:43,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1782721999] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:43,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:43,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 14:38:43,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692065316] [2022-04-06 14:38:43,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:43,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 14:38:43,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 14:38:43,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7272, Invalid=8478, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 14:38:43,527 INFO L87 Difference]: Start difference. First operand 305 states and 363 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:45,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:45,132 INFO L93 Difference]: Finished difference Result 323 states and 383 transitions. [2022-04-06 14:38:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 14:38:45,132 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-04-06 14:38:45,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:45,133 INFO L225 Difference]: With dead ends: 323 [2022-04-06 14:38:45,133 INFO L226 Difference]: Without dead ends: 317 [2022-04-06 14:38:45,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=14422, Invalid=20360, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 14:38:45,135 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1057 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:45,135 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 60 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:38:45,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-04-06 14:38:45,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 310. [2022-04-06 14:38:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.1967213114754098) internal successors, (365), 305 states have internal predecessors, (365), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 369 transitions. [2022-04-06 14:38:45,260 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 369 transitions. Word has length 133 [2022-04-06 14:38:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:45,260 INFO L478 AbstractCegarLoop]: Abstraction has 310 states and 369 transitions. [2022-04-06 14:38:45,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 62 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 369 transitions. [2022-04-06 14:38:45,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 14:38:45,261 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:45,261 INFO L499 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:45,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:45,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 14:38:45,471 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:45,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:45,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1020244142, now seen corresponding path program 117 times [2022-04-06 14:38:45,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:45,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1306880746] [2022-04-06 14:38:45,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:38:45,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1020244142, now seen corresponding path program 118 times [2022-04-06 14:38:45,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:45,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154066665] [2022-04-06 14:38:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:45,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:46,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:46,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:46,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154066665] [2022-04-06 14:38:46,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154066665] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:46,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338693042] [2022-04-06 14:38:46,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:38:46,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:46,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:46,259 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:46,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 14:38:46,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:38:46,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:46,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 14:38:46,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:46,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:48,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338693042] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:48,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:48,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-04-06 14:38:48,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:48,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1306880746] [2022-04-06 14:38:48,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1306880746] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:48,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:48,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 14:38:48,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119634847] [2022-04-06 14:38:48,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:48,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 14:38:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 14:38:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7515, Invalid=8741, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 14:38:48,435 INFO L87 Difference]: Start difference. First operand 310 states and 369 transitions. Second operand has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:50,440 INFO L93 Difference]: Finished difference Result 328 states and 389 transitions. [2022-04-06 14:38:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 14:38:50,440 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-04-06 14:38:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:50,441 INFO L225 Difference]: With dead ends: 328 [2022-04-06 14:38:50,441 INFO L226 Difference]: Without dead ends: 322 [2022-04-06 14:38:50,443 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=14906, Invalid=21004, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 14:38:50,443 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 824 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:50,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 45 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:38:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-04-06 14:38:50,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 315. [2022-04-06 14:38:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.196774193548387) internal successors, (371), 310 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 375 transitions. [2022-04-06 14:38:50,576 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 375 transitions. Word has length 135 [2022-04-06 14:38:50,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:50,576 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 375 transitions. [2022-04-06 14:38:50,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 63 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 375 transitions. [2022-04-06 14:38:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 14:38:50,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:50,577 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:50,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:50,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:50,793 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1560572787, now seen corresponding path program 119 times [2022-04-06 14:38:50,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:50,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926102442] [2022-04-06 14:38:50,794 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:38:50,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1560572787, now seen corresponding path program 120 times [2022-04-06 14:38:50,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:50,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466403647] [2022-04-06 14:38:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:50,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:51,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:51,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466403647] [2022-04-06 14:38:51,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466403647] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:51,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011820858] [2022-04-06 14:38:51,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:38:51,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:51,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:51,855 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:51,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 14:38:51,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-04-06 14:38:51,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:51,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 14:38:51,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:52,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:54,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011820858] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:54,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:54,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-04-06 14:38:54,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:54,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926102442] [2022-04-06 14:38:54,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926102442] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:54,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:54,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 14:38:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485320067] [2022-04-06 14:38:54,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:54,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 14:38:54,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 14:38:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7762, Invalid=9008, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 14:38:54,461 INFO L87 Difference]: Start difference. First operand 315 states and 375 transitions. Second operand has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:56,006 INFO L93 Difference]: Finished difference Result 333 states and 395 transitions. [2022-04-06 14:38:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 14:38:56,007 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-04-06 14:38:56,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:56,008 INFO L225 Difference]: With dead ends: 333 [2022-04-06 14:38:56,008 INFO L226 Difference]: Without dead ends: 327 [2022-04-06 14:38:56,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2986 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=15398, Invalid=21658, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 14:38:56,010 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 855 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:56,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 45 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:38:56,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-04-06 14:38:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 320. [2022-04-06 14:38:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1968253968253968) internal successors, (377), 315 states have internal predecessors, (377), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 381 transitions. [2022-04-06 14:38:56,138 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 381 transitions. Word has length 137 [2022-04-06 14:38:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:56,139 INFO L478 AbstractCegarLoop]: Abstraction has 320 states and 381 transitions. [2022-04-06 14:38:56,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 64 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:38:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 381 transitions. [2022-04-06 14:38:56,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 14:38:56,139 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:56,139 INFO L499 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:56,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 14:38:56,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:56,356 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:56,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1125357816, now seen corresponding path program 121 times [2022-04-06 14:38:56,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:56,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1239736541] [2022-04-06 14:38:56,357 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:38:56,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1125357816, now seen corresponding path program 122 times [2022-04-06 14:38:56,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:56,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215566234] [2022-04-06 14:38:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:56,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:57,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:57,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:57,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215566234] [2022-04-06 14:38:57,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215566234] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:57,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571352165] [2022-04-06 14:38:57,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:38:57,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:57,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:57,136 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:38:57,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 14:38:57,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:38:57,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:57,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 14:38:57,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:57,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:38:59,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571352165] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:59,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:59,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-04-06 14:38:59,577 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:59,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1239736541] [2022-04-06 14:38:59,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1239736541] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:59,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:59,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 14:38:59,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430343024] [2022-04-06 14:38:59,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:59,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 14:38:59,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:59,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 14:38:59,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8013, Invalid=9279, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 14:38:59,582 INFO L87 Difference]: Start difference. First operand 320 states and 381 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:01,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:01,125 INFO L93 Difference]: Finished difference Result 338 states and 401 transitions. [2022-04-06 14:39:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 14:39:01,125 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-04-06 14:39:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:01,126 INFO L225 Difference]: With dead ends: 338 [2022-04-06 14:39:01,126 INFO L226 Difference]: Without dead ends: 332 [2022-04-06 14:39:01,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3066 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=15898, Invalid=22322, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 14:39:01,128 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 895 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:01,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 35 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:39:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-04-06 14:39:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 325. [2022-04-06 14:39:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.196875) internal successors, (383), 320 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 387 transitions. [2022-04-06 14:39:01,270 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 387 transitions. Word has length 139 [2022-04-06 14:39:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:01,270 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 387 transitions. [2022-04-06 14:39:01,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 65 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 387 transitions. [2022-04-06 14:39:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 14:39:01,271 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:01,271 INFO L499 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:01,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 14:39:01,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:01,488 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:01,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:01,488 INFO L85 PathProgramCache]: Analyzing trace with hash 504401603, now seen corresponding path program 123 times [2022-04-06 14:39:01,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:01,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2025504075] [2022-04-06 14:39:01,489 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:39:01,489 INFO L85 PathProgramCache]: Analyzing trace with hash 504401603, now seen corresponding path program 124 times [2022-04-06 14:39:01,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:01,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698370759] [2022-04-06 14:39:01,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:01,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:02,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:02,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:02,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698370759] [2022-04-06 14:39:02,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698370759] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:02,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764720896] [2022-04-06 14:39:02,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:39:02,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:02,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:02,303 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:39:02,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 14:39:02,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:39:02,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:02,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 14:39:02,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:02,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:04,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764720896] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:39:04,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:39:04,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-04-06 14:39:04,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:04,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2025504075] [2022-04-06 14:39:04,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2025504075] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:04,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:04,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 14:39:04,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012595782] [2022-04-06 14:39:04,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:04,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 14:39:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:04,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 14:39:04,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8268, Invalid=9554, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 14:39:04,811 INFO L87 Difference]: Start difference. First operand 325 states and 387 transitions. Second operand has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:06,428 INFO L93 Difference]: Finished difference Result 343 states and 407 transitions. [2022-04-06 14:39:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 14:39:06,429 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-04-06 14:39:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:06,430 INFO L225 Difference]: With dead ends: 343 [2022-04-06 14:39:06,430 INFO L226 Difference]: Without dead ends: 337 [2022-04-06 14:39:06,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=16406, Invalid=22996, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 14:39:06,432 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 914 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:06,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 45 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:39:06,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-04-06 14:39:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 330. [2022-04-06 14:39:06,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 325 states have (on average 1.196923076923077) internal successors, (389), 325 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 393 transitions. [2022-04-06 14:39:06,573 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 393 transitions. Word has length 141 [2022-04-06 14:39:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:06,573 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 393 transitions. [2022-04-06 14:39:06,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 66 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:06,574 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 393 transitions. [2022-04-06 14:39:06,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 14:39:06,574 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:06,574 INFO L499 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:06,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 14:39:06,789 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:06,790 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash -959859778, now seen corresponding path program 125 times [2022-04-06 14:39:06,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:06,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [712934587] [2022-04-06 14:39:06,791 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:39:06,791 INFO L85 PathProgramCache]: Analyzing trace with hash -959859778, now seen corresponding path program 126 times [2022-04-06 14:39:06,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:06,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142950819] [2022-04-06 14:39:06,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:06,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:07,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:07,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:07,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142950819] [2022-04-06 14:39:07,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142950819] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:07,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933662820] [2022-04-06 14:39:07,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:39:07,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:07,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:07,869 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:39:07,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 14:39:07,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-04-06 14:39:07,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:07,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 14:39:07,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:08,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:10,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933662820] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:39:10,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:39:10,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-04-06 14:39:10,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:10,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [712934587] [2022-04-06 14:39:10,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [712934587] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:10,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:10,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 14:39:10,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405548702] [2022-04-06 14:39:10,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:10,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 14:39:10,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:10,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 14:39:10,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8527, Invalid=9833, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 14:39:10,391 INFO L87 Difference]: Start difference. First operand 330 states and 393 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:12,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:12,190 INFO L93 Difference]: Finished difference Result 348 states and 413 transitions. [2022-04-06 14:39:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 14:39:12,190 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-04-06 14:39:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:12,191 INFO L225 Difference]: With dead ends: 348 [2022-04-06 14:39:12,191 INFO L226 Difference]: Without dead ends: 342 [2022-04-06 14:39:12,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=16922, Invalid=23680, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 14:39:12,193 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 897 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:12,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 60 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:39:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-04-06 14:39:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 335. [2022-04-06 14:39:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.196969696969697) internal successors, (395), 330 states have internal predecessors, (395), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 399 transitions. [2022-04-06 14:39:12,335 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 399 transitions. Word has length 143 [2022-04-06 14:39:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:12,336 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 399 transitions. [2022-04-06 14:39:12,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 67 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 399 transitions. [2022-04-06 14:39:12,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 14:39:12,336 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:12,336 INFO L499 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:12,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 14:39:12,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 14:39:12,553 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:12,553 INFO L85 PathProgramCache]: Analyzing trace with hash 634226169, now seen corresponding path program 127 times [2022-04-06 14:39:12,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:12,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [214926732] [2022-04-06 14:39:12,553 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:39:12,554 INFO L85 PathProgramCache]: Analyzing trace with hash 634226169, now seen corresponding path program 128 times [2022-04-06 14:39:12,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:12,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852149647] [2022-04-06 14:39:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:12,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:13,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:13,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:13,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852149647] [2022-04-06 14:39:13,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852149647] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:13,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084336884] [2022-04-06 14:39:13,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:39:13,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:13,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:13,946 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:39:13,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 14:39:14,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:39:14,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:14,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 14:39:14,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:14,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:17,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084336884] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:39:17,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:39:17,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-04-06 14:39:17,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:17,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [214926732] [2022-04-06 14:39:17,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [214926732] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:17,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:17,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 14:39:17,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030124768] [2022-04-06 14:39:17,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:17,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 14:39:17,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 14:39:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8790, Invalid=10116, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 14:39:17,467 INFO L87 Difference]: Start difference. First operand 335 states and 399 transitions. Second operand has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:19,253 INFO L93 Difference]: Finished difference Result 353 states and 419 transitions. [2022-04-06 14:39:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 14:39:19,254 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-04-06 14:39:19,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:19,255 INFO L225 Difference]: With dead ends: 353 [2022-04-06 14:39:19,255 INFO L226 Difference]: Without dead ends: 347 [2022-04-06 14:39:19,256 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3312 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=17446, Invalid=24374, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 14:39:19,261 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 967 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:19,261 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 50 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:39:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-04-06 14:39:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 340. [2022-04-06 14:39:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.1970149253731344) internal successors, (401), 335 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 405 transitions. [2022-04-06 14:39:19,407 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 405 transitions. Word has length 145 [2022-04-06 14:39:19,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:19,407 INFO L478 AbstractCegarLoop]: Abstraction has 340 states and 405 transitions. [2022-04-06 14:39:19,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 68 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:19,407 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 405 transitions. [2022-04-06 14:39:19,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 14:39:19,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:19,408 INFO L499 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:19,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 14:39:19,624 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:19,624 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:19,624 INFO L85 PathProgramCache]: Analyzing trace with hash -752503436, now seen corresponding path program 129 times [2022-04-06 14:39:19,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:19,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [832437147] [2022-04-06 14:39:19,625 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:39:19,625 INFO L85 PathProgramCache]: Analyzing trace with hash -752503436, now seen corresponding path program 130 times [2022-04-06 14:39:19,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:19,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478906171] [2022-04-06 14:39:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:19,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:20,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:20,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:20,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478906171] [2022-04-06 14:39:20,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478906171] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:20,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587685520] [2022-04-06 14:39:20,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:39:20,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:20,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:20,448 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:39:20,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 14:39:20,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:39:20,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:20,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 14:39:20,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:20,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:23,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587685520] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:39:23,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:39:23,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-04-06 14:39:23,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:23,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [832437147] [2022-04-06 14:39:23,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [832437147] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:23,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:23,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 14:39:23,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012075368] [2022-04-06 14:39:23,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:23,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 14:39:23,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:23,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 14:39:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9057, Invalid=10403, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 14:39:23,155 INFO L87 Difference]: Start difference. First operand 340 states and 405 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:24,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:24,998 INFO L93 Difference]: Finished difference Result 358 states and 425 transitions. [2022-04-06 14:39:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 14:39:24,999 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-04-06 14:39:24,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:25,000 INFO L225 Difference]: With dead ends: 358 [2022-04-06 14:39:25,000 INFO L226 Difference]: Without dead ends: 352 [2022-04-06 14:39:25,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=17978, Invalid=25078, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 14:39:25,013 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1001 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:25,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 55 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:39:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-04-06 14:39:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 345. [2022-04-06 14:39:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.1970588235294117) internal successors, (407), 340 states have internal predecessors, (407), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 411 transitions. [2022-04-06 14:39:25,163 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 411 transitions. Word has length 147 [2022-04-06 14:39:25,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:25,164 INFO L478 AbstractCegarLoop]: Abstraction has 345 states and 411 transitions. [2022-04-06 14:39:25,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 69 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:25,164 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 411 transitions. [2022-04-06 14:39:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 14:39:25,164 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:25,165 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:25,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 14:39:25,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 14:39:25,372 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1959792081, now seen corresponding path program 131 times [2022-04-06 14:39:25,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:25,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1873157131] [2022-04-06 14:39:25,372 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:39:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1959792081, now seen corresponding path program 132 times [2022-04-06 14:39:25,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:25,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160913967] [2022-04-06 14:39:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:25,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:26,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:26,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:26,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160913967] [2022-04-06 14:39:26,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160913967] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:26,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57941119] [2022-04-06 14:39:26,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:39:26,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:26,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:26,820 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:39:26,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 14:39:26,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2022-04-06 14:39:26,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:26,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 14:39:26,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:27,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:29,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57941119] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:39:29,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:39:29,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 142 [2022-04-06 14:39:29,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:29,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1873157131] [2022-04-06 14:39:29,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1873157131] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:29,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:29,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 14:39:29,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785829739] [2022-04-06 14:39:29,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:29,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 14:39:29,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:29,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 14:39:29,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9328, Invalid=10694, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 14:39:29,689 INFO L87 Difference]: Start difference. First operand 345 states and 411 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:31,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:31,914 INFO L93 Difference]: Finished difference Result 363 states and 431 transitions. [2022-04-06 14:39:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 14:39:31,914 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-04-06 14:39:31,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:31,915 INFO L225 Difference]: With dead ends: 363 [2022-04-06 14:39:31,915 INFO L226 Difference]: Without dead ends: 357 [2022-04-06 14:39:31,917 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3481 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=18518, Invalid=25792, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 14:39:31,917 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1062 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:31,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 40 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:39:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-04-06 14:39:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 350. [2022-04-06 14:39:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.1971014492753622) internal successors, (413), 345 states have internal predecessors, (413), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 417 transitions. [2022-04-06 14:39:32,072 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 417 transitions. Word has length 149 [2022-04-06 14:39:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:32,072 INFO L478 AbstractCegarLoop]: Abstraction has 350 states and 417 transitions. [2022-04-06 14:39:32,073 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 70 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 417 transitions. [2022-04-06 14:39:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 14:39:32,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:32,073 INFO L499 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:32,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 14:39:32,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 14:39:32,282 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:32,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:32,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1771957290, now seen corresponding path program 133 times [2022-04-06 14:39:32,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:32,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1470877352] [2022-04-06 14:39:32,283 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:39:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1771957290, now seen corresponding path program 134 times [2022-04-06 14:39:32,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:32,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132990138] [2022-04-06 14:39:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:32,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:33,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:33,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:33,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132990138] [2022-04-06 14:39:33,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132990138] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:33,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497091291] [2022-04-06 14:39:33,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:39:33,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:33,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:33,257 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:39:33,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 14:39:33,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:39:33,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:33,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 14:39:33,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:33,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:36,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497091291] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:39:36,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:39:36,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-04-06 14:39:36,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:36,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1470877352] [2022-04-06 14:39:36,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1470877352] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:36,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:36,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 14:39:36,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743237178] [2022-04-06 14:39:36,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:36,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 14:39:36,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:36,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 14:39:36,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9603, Invalid=10989, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 14:39:36,383 INFO L87 Difference]: Start difference. First operand 350 states and 417 transitions. Second operand has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:38,321 INFO L93 Difference]: Finished difference Result 368 states and 437 transitions. [2022-04-06 14:39:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 14:39:38,321 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-04-06 14:39:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:38,322 INFO L225 Difference]: With dead ends: 368 [2022-04-06 14:39:38,322 INFO L226 Difference]: Without dead ends: 362 [2022-04-06 14:39:38,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3567 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=19066, Invalid=26516, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 14:39:38,324 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1042 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:38,325 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1042 Valid, 45 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:39:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-04-06 14:39:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 355. [2022-04-06 14:39:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 350 states have (on average 1.197142857142857) internal successors, (419), 350 states have internal predecessors, (419), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 423 transitions. [2022-04-06 14:39:38,491 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 423 transitions. Word has length 151 [2022-04-06 14:39:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:38,491 INFO L478 AbstractCegarLoop]: Abstraction has 355 states and 423 transitions. [2022-04-06 14:39:38,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 71 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 423 transitions. [2022-04-06 14:39:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 14:39:38,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:38,492 INFO L499 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:38,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 14:39:38,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 14:39:38,707 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:38,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1685410661, now seen corresponding path program 135 times [2022-04-06 14:39:38,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:38,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289123642] [2022-04-06 14:39:38,708 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:39:38,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1685410661, now seen corresponding path program 136 times [2022-04-06 14:39:38,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:38,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715139665] [2022-04-06 14:39:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:38,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:40,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:40,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:40,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715139665] [2022-04-06 14:39:40,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715139665] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:40,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928836497] [2022-04-06 14:39:40,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:39:40,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:40,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:40,207 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:39:40,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 14:39:40,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:39:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:40,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 14:39:40,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:40,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:43,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928836497] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:39:43,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:39:43,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-04-06 14:39:43,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:43,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289123642] [2022-04-06 14:39:43,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289123642] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:43,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:43,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 14:39:43,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940508806] [2022-04-06 14:39:43,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:43,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 14:39:43,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:43,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 14:39:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9882, Invalid=11288, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 14:39:43,706 INFO L87 Difference]: Start difference. First operand 355 states and 423 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:45,669 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2022-04-06 14:39:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 14:39:45,670 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-04-06 14:39:45,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:45,671 INFO L225 Difference]: With dead ends: 373 [2022-04-06 14:39:45,671 INFO L226 Difference]: Without dead ends: 367 [2022-04-06 14:39:45,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=19622, Invalid=27250, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 14:39:45,673 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1484 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:45,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 40 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:39:45,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-04-06 14:39:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 360. [2022-04-06 14:39:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 1.1971830985915493) internal successors, (425), 355 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 429 transitions. [2022-04-06 14:39:45,837 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 429 transitions. Word has length 153 [2022-04-06 14:39:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:45,837 INFO L478 AbstractCegarLoop]: Abstraction has 360 states and 429 transitions. [2022-04-06 14:39:45,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 72 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 429 transitions. [2022-04-06 14:39:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 14:39:45,837 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:45,838 INFO L499 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:45,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 14:39:46,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 14:39:46,054 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash 118478816, now seen corresponding path program 137 times [2022-04-06 14:39:46,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:46,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [529451285] [2022-04-06 14:39:46,055 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:39:46,055 INFO L85 PathProgramCache]: Analyzing trace with hash 118478816, now seen corresponding path program 138 times [2022-04-06 14:39:46,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:46,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227609684] [2022-04-06 14:39:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:46,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:46,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:46,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:46,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227609684] [2022-04-06 14:39:46,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227609684] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:46,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964767635] [2022-04-06 14:39:46,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:39:46,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:46,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:46,952 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:39:46,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 14:39:47,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2022-04-06 14:39:47,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 14:39:47,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:47,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:50,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964767635] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:39:50,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:39:50,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-04-06 14:39:50,200 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:50,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [529451285] [2022-04-06 14:39:50,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [529451285] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:50,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:50,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 14:39:50,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115538754] [2022-04-06 14:39:50,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:50,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 14:39:50,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:50,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 14:39:50,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10165, Invalid=11591, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 14:39:50,203 INFO L87 Difference]: Start difference. First operand 360 states and 429 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:53,091 INFO L93 Difference]: Finished difference Result 378 states and 449 transitions. [2022-04-06 14:39:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 14:39:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-04-06 14:39:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:53,092 INFO L225 Difference]: With dead ends: 378 [2022-04-06 14:39:53,093 INFO L226 Difference]: Without dead ends: 372 [2022-04-06 14:39:53,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=20186, Invalid=27994, Unknown=0, NotChecked=0, Total=48180 [2022-04-06 14:39:53,095 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1086 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:53,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 60 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:39:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-04-06 14:39:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 365. [2022-04-06 14:39:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.1972222222222222) internal successors, (431), 360 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:53,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 435 transitions. [2022-04-06 14:39:53,275 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 435 transitions. Word has length 155 [2022-04-06 14:39:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:53,275 INFO L478 AbstractCegarLoop]: Abstraction has 365 states and 435 transitions. [2022-04-06 14:39:53,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 73 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:39:53,275 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 435 transitions. [2022-04-06 14:39:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 14:39:53,276 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:53,276 INFO L499 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:53,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 14:39:53,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:53,490 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:53,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1830496667, now seen corresponding path program 139 times [2022-04-06 14:39:53,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:53,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1352270368] [2022-04-06 14:39:53,491 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:39:53,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1830496667, now seen corresponding path program 140 times [2022-04-06 14:39:53,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:53,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636031480] [2022-04-06 14:39:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:53,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:55,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:55,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:55,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636031480] [2022-04-06 14:39:55,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636031480] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:55,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374202795] [2022-04-06 14:39:55,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:39:55,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:55,134 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:39:55,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 14:39:55,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:39:55,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:55,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 14:39:55,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:55,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:39:58,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374202795] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:39:58,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:39:58,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-04-06 14:39:58,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:58,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1352270368] [2022-04-06 14:39:58,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1352270368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:58,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:58,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 14:39:58,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600981176] [2022-04-06 14:39:58,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:58,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 14:39:58,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:58,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 14:39:58,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10452, Invalid=11898, Unknown=0, NotChecked=0, Total=22350 [2022-04-06 14:39:58,245 INFO L87 Difference]: Start difference. First operand 365 states and 435 transitions. Second operand has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:40:00,325 INFO L93 Difference]: Finished difference Result 383 states and 455 transitions. [2022-04-06 14:40:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 14:40:00,325 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-04-06 14:40:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:40:00,326 INFO L225 Difference]: With dead ends: 383 [2022-04-06 14:40:00,326 INFO L226 Difference]: Without dead ends: 377 [2022-04-06 14:40:00,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3831 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=20758, Invalid=28748, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 14:40:00,329 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 976 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:40:00,329 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 60 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:40:00,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-04-06 14:40:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 370. [2022-04-06 14:40:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.1972602739726028) internal successors, (437), 365 states have internal predecessors, (437), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 441 transitions. [2022-04-06 14:40:00,529 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 441 transitions. Word has length 157 [2022-04-06 14:40:00,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:40:00,529 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 441 transitions. [2022-04-06 14:40:00,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 74 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:00,529 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 441 transitions. [2022-04-06 14:40:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 14:40:00,529 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:40:00,530 INFO L499 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:40:00,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 14:40:00,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:00,746 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:40:00,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:40:00,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2107177110, now seen corresponding path program 141 times [2022-04-06 14:40:00,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:00,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1254208842] [2022-04-06 14:40:00,747 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:40:00,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2107177110, now seen corresponding path program 142 times [2022-04-06 14:40:00,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:40:00,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480545058] [2022-04-06 14:40:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:40:00,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:40:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:02,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:40:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:02,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:40:02,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480545058] [2022-04-06 14:40:02,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480545058] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:02,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490691339] [2022-04-06 14:40:02,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:40:02,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:02,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:40:02,402 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:40:02,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 14:40:02,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:40:02,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:02,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 14:40:02,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:02,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:40:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:05,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490691339] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:40:05,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:40:05,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-04-06 14:40:05,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:40:05,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1254208842] [2022-04-06 14:40:05,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1254208842] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:40:05,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:40:05,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 14:40:05,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302291129] [2022-04-06 14:40:05,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:40:05,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 14:40:05,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:05,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 14:40:05,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10743, Invalid=12209, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 14:40:05,956 INFO L87 Difference]: Start difference. First operand 370 states and 441 transitions. Second operand has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:40:08,109 INFO L93 Difference]: Finished difference Result 388 states and 461 transitions. [2022-04-06 14:40:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 14:40:08,109 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-04-06 14:40:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:40:08,110 INFO L225 Difference]: With dead ends: 388 [2022-04-06 14:40:08,111 INFO L226 Difference]: Without dead ends: 382 [2022-04-06 14:40:08,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3921 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=21338, Invalid=29512, Unknown=0, NotChecked=0, Total=50850 [2022-04-06 14:40:08,113 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1115 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:40:08,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 45 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:40:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-04-06 14:40:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 375. [2022-04-06 14:40:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 370 states have (on average 1.1972972972972973) internal successors, (443), 370 states have internal predecessors, (443), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:08,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 447 transitions. [2022-04-06 14:40:08,301 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 447 transitions. Word has length 159 [2022-04-06 14:40:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:40:08,301 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 447 transitions. [2022-04-06 14:40:08,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 75 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 447 transitions. [2022-04-06 14:40:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 14:40:08,302 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:40:08,302 INFO L499 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:40:08,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-04-06 14:40:08,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:08,513 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:40:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:40:08,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1709110481, now seen corresponding path program 143 times [2022-04-06 14:40:08,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:08,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2139343909] [2022-04-06 14:40:08,514 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:40:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1709110481, now seen corresponding path program 144 times [2022-04-06 14:40:08,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:40:08,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421855465] [2022-04-06 14:40:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:40:08,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:40:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:09,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:40:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:09,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:40:09,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421855465] [2022-04-06 14:40:09,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421855465] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:09,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256332511] [2022-04-06 14:40:09,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:40:09,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:09,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:40:09,496 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:40:09,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 14:40:09,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2022-04-06 14:40:09,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:09,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 14:40:09,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:09,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:40:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:12,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256332511] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:40:12,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:40:12,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 154 [2022-04-06 14:40:12,692 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:40:12,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2139343909] [2022-04-06 14:40:12,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2139343909] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:40:12,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:40:12,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 14:40:12,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891367610] [2022-04-06 14:40:12,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:40:12,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 14:40:12,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:12,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 14:40:12,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11038, Invalid=12524, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 14:40:12,694 INFO L87 Difference]: Start difference. First operand 375 states and 447 transitions. Second operand has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:40:15,747 INFO L93 Difference]: Finished difference Result 393 states and 467 transitions. [2022-04-06 14:40:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 14:40:15,747 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-04-06 14:40:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:40:15,748 INFO L225 Difference]: With dead ends: 393 [2022-04-06 14:40:15,748 INFO L226 Difference]: Without dead ends: 387 [2022-04-06 14:40:15,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4012 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=21926, Invalid=30286, Unknown=0, NotChecked=0, Total=52212 [2022-04-06 14:40:15,751 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:40:15,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 40 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:40:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-04-06 14:40:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 380. [2022-04-06 14:40:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.1973333333333334) internal successors, (449), 375 states have internal predecessors, (449), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 453 transitions. [2022-04-06 14:40:15,945 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 453 transitions. Word has length 161 [2022-04-06 14:40:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:40:15,945 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 453 transitions. [2022-04-06 14:40:15,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 76 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 453 transitions. [2022-04-06 14:40:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 14:40:15,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:40:15,947 INFO L499 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:40:15,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 14:40:16,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 14:40:16,155 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:40:16,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:40:16,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1419169356, now seen corresponding path program 145 times [2022-04-06 14:40:16,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:16,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [559665672] [2022-04-06 14:40:16,156 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:40:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1419169356, now seen corresponding path program 146 times [2022-04-06 14:40:16,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:40:16,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364425436] [2022-04-06 14:40:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:40:16,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:40:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:17,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:40:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:17,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:40:17,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364425436] [2022-04-06 14:40:17,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364425436] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:17,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716871667] [2022-04-06 14:40:17,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:40:17,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:17,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:40:17,890 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:40:17,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 14:40:17,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:40:17,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:17,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 14:40:17,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:18,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:40:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:21,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716871667] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:40:21,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:40:21,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-04-06 14:40:21,404 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:40:21,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [559665672] [2022-04-06 14:40:21,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [559665672] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:40:21,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:40:21,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 14:40:21,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130952604] [2022-04-06 14:40:21,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:40:21,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 14:40:21,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:21,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 14:40:21,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11337, Invalid=12843, Unknown=0, NotChecked=0, Total=24180 [2022-04-06 14:40:21,407 INFO L87 Difference]: Start difference. First operand 380 states and 453 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:40:23,910 INFO L93 Difference]: Finished difference Result 398 states and 473 transitions. [2022-04-06 14:40:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 14:40:23,910 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-04-06 14:40:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:40:23,912 INFO L225 Difference]: With dead ends: 398 [2022-04-06 14:40:23,912 INFO L226 Difference]: Without dead ends: 392 [2022-04-06 14:40:23,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4104 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=22522, Invalid=31070, Unknown=0, NotChecked=0, Total=53592 [2022-04-06 14:40:23,914 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 967 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:40:23,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 65 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:40:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-04-06 14:40:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 385. [2022-04-06 14:40:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 380 states have (on average 1.1973684210526316) internal successors, (455), 380 states have internal predecessors, (455), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 459 transitions. [2022-04-06 14:40:24,103 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 459 transitions. Word has length 163 [2022-04-06 14:40:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:40:24,103 INFO L478 AbstractCegarLoop]: Abstraction has 385 states and 459 transitions. [2022-04-06 14:40:24,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 77 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 459 transitions. [2022-04-06 14:40:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 14:40:24,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:40:24,104 INFO L499 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:40:24,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 14:40:24,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:24,306 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:40:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:40:24,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1958622471, now seen corresponding path program 147 times [2022-04-06 14:40:24,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:24,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1468418254] [2022-04-06 14:40:24,311 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:40:24,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1958622471, now seen corresponding path program 148 times [2022-04-06 14:40:24,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:40:24,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396893927] [2022-04-06 14:40:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:40:24,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:40:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:26,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:40:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:26,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:40:26,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396893927] [2022-04-06 14:40:26,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396893927] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:26,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096921031] [2022-04-06 14:40:26,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:40:26,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:26,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:40:26,066 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:40:26,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 14:40:26,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:40:26,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:26,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 14:40:26,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:26,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:40:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:29,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096921031] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:40:29,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:40:29,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-04-06 14:40:29,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:40:29,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1468418254] [2022-04-06 14:40:29,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1468418254] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:40:29,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:40:29,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 14:40:29,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150085810] [2022-04-06 14:40:29,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:40:29,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 14:40:29,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:29,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 14:40:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11640, Invalid=13166, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 14:40:29,606 INFO L87 Difference]: Start difference. First operand 385 states and 459 transitions. Second operand has 80 states, 80 states have (on average 2.0125) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:31,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:40:31,979 INFO L93 Difference]: Finished difference Result 403 states and 479 transitions. [2022-04-06 14:40:31,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 14:40:31,980 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-04-06 14:40:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:40:31,981 INFO L225 Difference]: With dead ends: 403 [2022-04-06 14:40:31,981 INFO L226 Difference]: Without dead ends: 397 [2022-04-06 14:40:31,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4197 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=23126, Invalid=31864, Unknown=0, NotChecked=0, Total=54990 [2022-04-06 14:40:31,984 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1106 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:40:31,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 60 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:40:31,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-04-06 14:40:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 390. [2022-04-06 14:40:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 385 states have (on average 1.1974025974025975) internal successors, (461), 385 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 465 transitions. [2022-04-06 14:40:32,186 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 465 transitions. Word has length 165 [2022-04-06 14:40:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:40:32,186 INFO L478 AbstractCegarLoop]: Abstraction has 390 states and 465 transitions. [2022-04-06 14:40:32,186 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 78 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 465 transitions. [2022-04-06 14:40:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 14:40:32,187 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:40:32,187 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:40:32,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 14:40:32,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:32,403 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:40:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:40:32,404 INFO L85 PathProgramCache]: Analyzing trace with hash 682023170, now seen corresponding path program 149 times [2022-04-06 14:40:32,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:32,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190239235] [2022-04-06 14:40:32,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:40:32,404 INFO L85 PathProgramCache]: Analyzing trace with hash 682023170, now seen corresponding path program 150 times [2022-04-06 14:40:32,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:40:32,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136636313] [2022-04-06 14:40:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:40:32,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:40:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:33,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:40:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:33,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:40:33,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136636313] [2022-04-06 14:40:33,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136636313] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:33,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541345862] [2022-04-06 14:40:33,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:40:33,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:33,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:40:33,562 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:40:33,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 14:40:33,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2022-04-06 14:40:33,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:33,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 14:40:33,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:33,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:40:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:37,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541345862] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:40:37,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:40:37,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 160 [2022-04-06 14:40:37,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:40:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190239235] [2022-04-06 14:40:37,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190239235] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:40:37,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:40:37,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 14:40:37,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407073531] [2022-04-06 14:40:37,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:40:37,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 14:40:37,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:37,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 14:40:37,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11947, Invalid=13493, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 14:40:37,590 INFO L87 Difference]: Start difference. First operand 390 states and 465 transitions. Second operand has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:40:40,551 INFO L93 Difference]: Finished difference Result 408 states and 485 transitions. [2022-04-06 14:40:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 14:40:40,551 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-04-06 14:40:40,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:40:40,552 INFO L225 Difference]: With dead ends: 408 [2022-04-06 14:40:40,552 INFO L226 Difference]: Without dead ends: 402 [2022-04-06 14:40:40,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4291 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=23738, Invalid=32668, Unknown=0, NotChecked=0, Total=56406 [2022-04-06 14:40:40,556 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1302 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:40:40,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 60 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:40:40,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-04-06 14:40:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 395. [2022-04-06 14:40:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 390 states have (on average 1.1974358974358974) internal successors, (467), 390 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 471 transitions. [2022-04-06 14:40:40,765 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 471 transitions. Word has length 167 [2022-04-06 14:40:40,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:40:40,765 INFO L478 AbstractCegarLoop]: Abstraction has 395 states and 471 transitions. [2022-04-06 14:40:40,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 79 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:40,766 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 471 transitions. [2022-04-06 14:40:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 14:40:40,766 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:40:40,766 INFO L499 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:40:40,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 14:40:40,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 14:40:40,983 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:40:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:40:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2064225731, now seen corresponding path program 151 times [2022-04-06 14:40:40,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:40,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [601664663] [2022-04-06 14:40:40,984 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:40:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2064225731, now seen corresponding path program 152 times [2022-04-06 14:40:40,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:40:40,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374758555] [2022-04-06 14:40:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:40:40,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:40:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:42,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:40:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:42,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:40:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374758555] [2022-04-06 14:40:42,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374758555] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662221756] [2022-04-06 14:40:42,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:40:42,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:42,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:40:42,879 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:40:42,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 14:40:42,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:40:42,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:42,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 14:40:42,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:43,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:40:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:46,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662221756] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:40:46,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:40:46,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-04-06 14:40:46,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:40:46,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [601664663] [2022-04-06 14:40:46,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [601664663] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:40:46,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:40:46,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 14:40:46,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534587777] [2022-04-06 14:40:46,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:40:46,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 14:40:46,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:46,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 14:40:46,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12258, Invalid=13824, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 14:40:46,504 INFO L87 Difference]: Start difference. First operand 395 states and 471 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:40:49,808 INFO L93 Difference]: Finished difference Result 413 states and 491 transitions. [2022-04-06 14:40:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 14:40:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-04-06 14:40:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:40:49,810 INFO L225 Difference]: With dead ends: 413 [2022-04-06 14:40:49,810 INFO L226 Difference]: Without dead ends: 407 [2022-04-06 14:40:49,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=24358, Invalid=33482, Unknown=0, NotChecked=0, Total=57840 [2022-04-06 14:40:49,812 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1381 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:40:49,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 40 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:40:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-04-06 14:40:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 400. [2022-04-06 14:40:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.1974683544303797) internal successors, (473), 395 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 477 transitions. [2022-04-06 14:40:50,031 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 477 transitions. Word has length 169 [2022-04-06 14:40:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:40:50,031 INFO L478 AbstractCegarLoop]: Abstraction has 400 states and 477 transitions. [2022-04-06 14:40:50,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 80 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:40:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 477 transitions. [2022-04-06 14:40:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 14:40:50,032 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:40:50,032 INFO L499 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:40:50,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 14:40:50,248 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 14:40:50,248 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:40:50,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:40:50,249 INFO L85 PathProgramCache]: Analyzing trace with hash 195467448, now seen corresponding path program 153 times [2022-04-06 14:40:50,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:50,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [432476365] [2022-04-06 14:40:50,249 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:40:50,249 INFO L85 PathProgramCache]: Analyzing trace with hash 195467448, now seen corresponding path program 154 times [2022-04-06 14:40:50,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:40:50,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103924817] [2022-04-06 14:40:50,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:40:50,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:40:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:52,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:40:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:52,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:40:52,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103924817] [2022-04-06 14:40:52,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103924817] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:52,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004633353] [2022-04-06 14:40:52,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:40:52,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:52,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:40:52,176 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:40:52,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 14:40:52,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:40:52,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:52,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 14:40:52,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:52,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:40:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:40:56,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004633353] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:40:56,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:40:56,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-04-06 14:40:56,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:40:56,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [432476365] [2022-04-06 14:40:56,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [432476365] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:40:56,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:40:56,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 14:40:56,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541428662] [2022-04-06 14:40:56,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:40:56,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 14:40:56,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:56,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 14:40:56,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12573, Invalid=14159, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 14:40:56,654 INFO L87 Difference]: Start difference. First operand 400 states and 477 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:41:00,070 INFO L93 Difference]: Finished difference Result 418 states and 497 transitions. [2022-04-06 14:41:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 14:41:00,071 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-04-06 14:41:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:41:00,072 INFO L225 Difference]: With dead ends: 418 [2022-04-06 14:41:00,072 INFO L226 Difference]: Without dead ends: 412 [2022-04-06 14:41:00,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4482 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=24986, Invalid=34306, Unknown=0, NotChecked=0, Total=59292 [2022-04-06 14:41:00,074 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1016 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:41:00,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 65 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:41:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-04-06 14:41:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 405. [2022-04-06 14:41:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 400 states have (on average 1.1975) internal successors, (479), 400 states have internal predecessors, (479), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 483 transitions. [2022-04-06 14:41:00,293 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 483 transitions. Word has length 171 [2022-04-06 14:41:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:41:00,293 INFO L478 AbstractCegarLoop]: Abstraction has 405 states and 483 transitions. [2022-04-06 14:41:00,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 81 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 483 transitions. [2022-04-06 14:41:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 14:41:00,294 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:41:00,294 INFO L499 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:41:00,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-04-06 14:41:00,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:00,505 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:41:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:41:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1492839309, now seen corresponding path program 155 times [2022-04-06 14:41:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:00,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [966065510] [2022-04-06 14:41:00,505 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:41:00,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1492839309, now seen corresponding path program 156 times [2022-04-06 14:41:00,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:41:00,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984081090] [2022-04-06 14:41:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:41:00,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:41:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:01,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:41:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:01,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:41:01,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984081090] [2022-04-06 14:41:01,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984081090] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:41:01,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678358497] [2022-04-06 14:41:01,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:41:01,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:01,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:41:01,762 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:41:01,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 14:41:01,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2022-04-06 14:41:01,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:41:01,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 14:41:01,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:41:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:02,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:41:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:05,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678358497] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:41:05,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:41:05,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 166 [2022-04-06 14:41:05,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:41:05,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [966065510] [2022-04-06 14:41:05,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [966065510] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:41:05,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:41:05,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 14:41:05,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567061358] [2022-04-06 14:41:05,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:41:05,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 14:41:05,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 14:41:05,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12892, Invalid=14498, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 14:41:05,305 INFO L87 Difference]: Start difference. First operand 405 states and 483 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:08,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:41:08,533 INFO L93 Difference]: Finished difference Result 423 states and 503 transitions. [2022-04-06 14:41:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 14:41:08,534 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-04-06 14:41:08,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:41:08,535 INFO L225 Difference]: With dead ends: 423 [2022-04-06 14:41:08,535 INFO L226 Difference]: Without dead ends: 417 [2022-04-06 14:41:08,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4579 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=25622, Invalid=35140, Unknown=0, NotChecked=0, Total=60762 [2022-04-06 14:41:08,538 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1128 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:41:08,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 55 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:41:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-04-06 14:41:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 410. [2022-04-06 14:41:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 405 states have (on average 1.1975308641975309) internal successors, (485), 405 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 489 transitions. [2022-04-06 14:41:08,779 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 489 transitions. Word has length 173 [2022-04-06 14:41:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:41:08,780 INFO L478 AbstractCegarLoop]: Abstraction has 410 states and 489 transitions. [2022-04-06 14:41:08,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 82 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 489 transitions. [2022-04-06 14:41:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 14:41:08,780 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:41:08,781 INFO L499 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:41:08,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 14:41:08,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:08,995 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:41:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:41:08,995 INFO L85 PathProgramCache]: Analyzing trace with hash -457994898, now seen corresponding path program 157 times [2022-04-06 14:41:08,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:08,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1778420408] [2022-04-06 14:41:08,996 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:41:08,996 INFO L85 PathProgramCache]: Analyzing trace with hash -457994898, now seen corresponding path program 158 times [2022-04-06 14:41:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:41:08,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118640880] [2022-04-06 14:41:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:41:08,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:41:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:10,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:41:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:10,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:41:10,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118640880] [2022-04-06 14:41:10,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118640880] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:41:10,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277892973] [2022-04-06 14:41:10,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:41:10,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:10,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:41:10,136 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:41:10,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 14:41:10,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:41:10,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:41:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 14:41:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:41:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:10,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:41:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:13,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277892973] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:41:13,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:41:13,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-04-06 14:41:13,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:41:13,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1778420408] [2022-04-06 14:41:13,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1778420408] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:41:13,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:41:13,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 14:41:13,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975668023] [2022-04-06 14:41:13,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:41:13,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 14:41:13,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:13,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 14:41:13,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13215, Invalid=14841, Unknown=0, NotChecked=0, Total=28056 [2022-04-06 14:41:13,823 INFO L87 Difference]: Start difference. First operand 410 states and 489 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:16,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:41:16,522 INFO L93 Difference]: Finished difference Result 428 states and 509 transitions. [2022-04-06 14:41:16,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 14:41:16,523 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-04-06 14:41:16,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:41:16,524 INFO L225 Difference]: With dead ends: 428 [2022-04-06 14:41:16,524 INFO L226 Difference]: Without dead ends: 422 [2022-04-06 14:41:16,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=26266, Invalid=35984, Unknown=0, NotChecked=0, Total=62250 [2022-04-06 14:41:16,527 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1216 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:41:16,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 50 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:41:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-06 14:41:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 415. [2022-04-06 14:41:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 410 states have (on average 1.197560975609756) internal successors, (491), 410 states have internal predecessors, (491), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 495 transitions. [2022-04-06 14:41:16,757 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 495 transitions. Word has length 175 [2022-04-06 14:41:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:41:16,758 INFO L478 AbstractCegarLoop]: Abstraction has 415 states and 495 transitions. [2022-04-06 14:41:16,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 83 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 495 transitions. [2022-04-06 14:41:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 14:41:16,758 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:41:16,759 INFO L499 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:41:16,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 14:41:16,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:16,976 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:41:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:41:16,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1890038697, now seen corresponding path program 159 times [2022-04-06 14:41:16,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:16,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [119553980] [2022-04-06 14:41:16,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:41:16,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1890038697, now seen corresponding path program 160 times [2022-04-06 14:41:16,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:41:16,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903021833] [2022-04-06 14:41:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:41:16,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:41:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:18,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:41:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:18,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:41:18,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903021833] [2022-04-06 14:41:18,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903021833] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:41:18,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5074782] [2022-04-06 14:41:18,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:41:18,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:18,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:41:18,480 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:41:18,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 14:41:18,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:41:18,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:41:18,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 14:41:18,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:41:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:18,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:41:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:23,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5074782] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:41:23,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:41:23,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-04-06 14:41:23,599 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:41:23,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [119553980] [2022-04-06 14:41:23,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [119553980] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:41:23,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:41:23,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 14:41:23,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849990488] [2022-04-06 14:41:23,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:41:23,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 14:41:23,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:23,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 14:41:23,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13542, Invalid=15188, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 14:41:23,602 INFO L87 Difference]: Start difference. First operand 415 states and 495 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:41:26,333 INFO L93 Difference]: Finished difference Result 433 states and 515 transitions. [2022-04-06 14:41:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 14:41:26,333 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-04-06 14:41:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:41:26,335 INFO L225 Difference]: With dead ends: 433 [2022-04-06 14:41:26,335 INFO L226 Difference]: Without dead ends: 427 [2022-04-06 14:41:26,337 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4776 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=26918, Invalid=36838, Unknown=0, NotChecked=0, Total=63756 [2022-04-06 14:41:26,338 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1133 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:41:26,338 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1133 Valid, 65 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:41:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-04-06 14:41:26,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 420. [2022-04-06 14:41:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 415 states have (on average 1.1975903614457832) internal successors, (497), 415 states have internal predecessors, (497), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 501 transitions. [2022-04-06 14:41:26,571 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 501 transitions. Word has length 177 [2022-04-06 14:41:26,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:41:26,571 INFO L478 AbstractCegarLoop]: Abstraction has 420 states and 501 transitions. [2022-04-06 14:41:26,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 84 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:26,571 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 501 transitions. [2022-04-06 14:41:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 14:41:26,572 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:41:26,572 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:41:26,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 14:41:26,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:26,775 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:41:26,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:41:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash -802474204, now seen corresponding path program 161 times [2022-04-06 14:41:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:26,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [329222203] [2022-04-06 14:41:26,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:41:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash -802474204, now seen corresponding path program 162 times [2022-04-06 14:41:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:41:26,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172302769] [2022-04-06 14:41:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:41:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:41:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:28,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:41:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:28,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:41:28,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172302769] [2022-04-06 14:41:28,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172302769] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:41:28,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654072477] [2022-04-06 14:41:28,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:41:28,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:28,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:41:28,008 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:41:28,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 14:41:28,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2022-04-06 14:41:28,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:41:28,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 14:41:28,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:41:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:28,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:41:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:31,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654072477] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:41:31,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:41:31,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 172 [2022-04-06 14:41:31,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:41:31,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [329222203] [2022-04-06 14:41:31,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [329222203] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:41:31,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:41:31,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 14:41:31,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216301190] [2022-04-06 14:41:31,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:41:31,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 14:41:31,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:31,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 14:41:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13873, Invalid=15539, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 14:41:31,876 INFO L87 Difference]: Start difference. First operand 420 states and 501 transitions. Second operand has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:41:35,762 INFO L93 Difference]: Finished difference Result 438 states and 521 transitions. [2022-04-06 14:41:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 14:41:35,762 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-04-06 14:41:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:41:35,764 INFO L225 Difference]: With dead ends: 438 [2022-04-06 14:41:35,764 INFO L226 Difference]: Without dead ends: 432 [2022-04-06 14:41:35,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4876 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=27578, Invalid=37702, Unknown=0, NotChecked=0, Total=65280 [2022-04-06 14:41:35,766 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1296 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:41:35,766 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 40 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:41:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-04-06 14:41:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 425. [2022-04-06 14:41:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.1976190476190476) internal successors, (503), 420 states have internal predecessors, (503), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 507 transitions. [2022-04-06 14:41:36,015 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 507 transitions. Word has length 179 [2022-04-06 14:41:36,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:41:36,016 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 507 transitions. [2022-04-06 14:41:36,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 85 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 507 transitions. [2022-04-06 14:41:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 14:41:36,017 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:41:36,017 INFO L499 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:41:36,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-06 14:41:36,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:36,233 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:41:36,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:41:36,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1557907423, now seen corresponding path program 163 times [2022-04-06 14:41:36,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:36,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [136512404] [2022-04-06 14:41:36,234 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:41:36,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1557907423, now seen corresponding path program 164 times [2022-04-06 14:41:36,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:41:36,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878206956] [2022-04-06 14:41:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:41:36,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:41:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:37,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:41:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:37,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:41:37,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878206956] [2022-04-06 14:41:37,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878206956] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:41:37,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137093805] [2022-04-06 14:41:37,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:41:37,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:37,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:41:37,610 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:41:37,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 14:41:37,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:41:37,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:41:37,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 14:41:37,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:41:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:37,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:41:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:41,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137093805] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:41:41,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:41:41,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-04-06 14:41:41,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:41:41,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [136512404] [2022-04-06 14:41:41,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [136512404] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:41:41,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:41:41,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 14:41:41,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451696572] [2022-04-06 14:41:41,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:41:41,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 14:41:41,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:41,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 14:41:41,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14208, Invalid=15894, Unknown=0, NotChecked=0, Total=30102 [2022-04-06 14:41:41,536 INFO L87 Difference]: Start difference. First operand 425 states and 507 transitions. Second operand has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:41:44,815 INFO L93 Difference]: Finished difference Result 443 states and 527 transitions. [2022-04-06 14:41:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 14:41:44,815 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-04-06 14:41:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:41:44,816 INFO L225 Difference]: With dead ends: 443 [2022-04-06 14:41:44,816 INFO L226 Difference]: Without dead ends: 437 [2022-04-06 14:41:44,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4977 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=28246, Invalid=38576, Unknown=0, NotChecked=0, Total=66822 [2022-04-06 14:41:44,819 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1279 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:41:44,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1279 Valid, 40 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:41:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-04-06 14:41:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 430. [2022-04-06 14:41:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 425 states have (on average 1.1976470588235295) internal successors, (509), 425 states have internal predecessors, (509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 513 transitions. [2022-04-06 14:41:45,064 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 513 transitions. Word has length 181 [2022-04-06 14:41:45,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:41:45,064 INFO L478 AbstractCegarLoop]: Abstraction has 430 states and 513 transitions. [2022-04-06 14:41:45,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 86 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 513 transitions. [2022-04-06 14:41:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 14:41:45,065 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:41:45,065 INFO L499 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:41:45,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-04-06 14:41:45,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-04-06 14:41:45,280 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:41:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:41:45,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2141918682, now seen corresponding path program 165 times [2022-04-06 14:41:45,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:45,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1406272413] [2022-04-06 14:41:45,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:41:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2141918682, now seen corresponding path program 166 times [2022-04-06 14:41:45,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:41:45,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563996607] [2022-04-06 14:41:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:41:45,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:41:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:46,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:41:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:46,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:41:46,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563996607] [2022-04-06 14:41:46,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563996607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:41:46,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291828810] [2022-04-06 14:41:46,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:41:46,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:46,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:41:46,503 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:41:46,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 14:41:46,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:41:46,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:41:46,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 14:41:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:41:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:46,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:41:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:51,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291828810] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:41:51,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:41:51,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-04-06 14:41:51,518 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:41:51,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1406272413] [2022-04-06 14:41:51,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1406272413] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:41:51,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:41:51,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 14:41:51,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215546235] [2022-04-06 14:41:51,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:41:51,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 14:41:51,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:51,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 14:41:51,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14547, Invalid=16253, Unknown=0, NotChecked=0, Total=30800 [2022-04-06 14:41:51,521 INFO L87 Difference]: Start difference. First operand 430 states and 513 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:41:55,142 INFO L93 Difference]: Finished difference Result 448 states and 533 transitions. [2022-04-06 14:41:55,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 14:41:55,142 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-04-06 14:41:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:41:55,143 INFO L225 Difference]: With dead ends: 448 [2022-04-06 14:41:55,143 INFO L226 Difference]: Without dead ends: 442 [2022-04-06 14:41:55,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5079 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=28922, Invalid=39460, Unknown=0, NotChecked=0, Total=68382 [2022-04-06 14:41:55,147 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1649 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:41:55,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1649 Valid, 40 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:41:55,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-04-06 14:41:55,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 435. [2022-04-06 14:41:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 430 states have (on average 1.197674418604651) internal successors, (515), 430 states have internal predecessors, (515), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 519 transitions. [2022-04-06 14:41:55,416 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 519 transitions. Word has length 183 [2022-04-06 14:41:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:41:55,416 INFO L478 AbstractCegarLoop]: Abstraction has 435 states and 519 transitions. [2022-04-06 14:41:55,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 87 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:41:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 519 transitions. [2022-04-06 14:41:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 14:41:55,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:41:55,417 INFO L499 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:41:55,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 14:41:55,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:55,631 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:41:55,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:41:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash 736022805, now seen corresponding path program 167 times [2022-04-06 14:41:55,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:55,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1259321073] [2022-04-06 14:41:55,632 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:41:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash 736022805, now seen corresponding path program 168 times [2022-04-06 14:41:55,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:41:55,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564966340] [2022-04-06 14:41:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:41:55,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:41:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:57,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:41:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:57,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:41:57,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564966340] [2022-04-06 14:41:57,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564966340] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:41:57,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74245313] [2022-04-06 14:41:57,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:41:57,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:57,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:41:57,614 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:41:57,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 14:41:57,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2022-04-06 14:41:57,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:41:57,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 14:41:57,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:41:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:41:58,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:42:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:02,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74245313] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:42:02,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:42:02,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 178 [2022-04-06 14:42:02,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:42:02,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1259321073] [2022-04-06 14:42:02,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1259321073] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:42:02,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:42:02,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 14:42:02,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874149686] [2022-04-06 14:42:02,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:42:02,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 14:42:02,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:02,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 14:42:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14890, Invalid=16616, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 14:42:02,502 INFO L87 Difference]: Start difference. First operand 435 states and 519 transitions. Second operand has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:05,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:42:05,664 INFO L93 Difference]: Finished difference Result 453 states and 539 transitions. [2022-04-06 14:42:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 14:42:05,664 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-04-06 14:42:05,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:42:05,668 INFO L225 Difference]: With dead ends: 453 [2022-04-06 14:42:05,668 INFO L226 Difference]: Without dead ends: 447 [2022-04-06 14:42:05,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5182 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=29606, Invalid=40354, Unknown=0, NotChecked=0, Total=69960 [2022-04-06 14:42:05,674 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1314 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:42:05,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 45 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:42:05,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-04-06 14:42:05,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 440. [2022-04-06 14:42:05,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.1977011494252874) internal successors, (521), 435 states have internal predecessors, (521), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:05,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 525 transitions. [2022-04-06 14:42:05,937 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 525 transitions. Word has length 185 [2022-04-06 14:42:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:42:05,938 INFO L478 AbstractCegarLoop]: Abstraction has 440 states and 525 transitions. [2022-04-06 14:42:05,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 88 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 525 transitions. [2022-04-06 14:42:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 14:42:05,938 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:42:05,939 INFO L499 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:42:05,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-04-06 14:42:06,152 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:06,152 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:42:06,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:42:06,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1710184048, now seen corresponding path program 169 times [2022-04-06 14:42:06,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:06,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1808239761] [2022-04-06 14:42:06,153 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:42:06,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1710184048, now seen corresponding path program 170 times [2022-04-06 14:42:06,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:42:06,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220476437] [2022-04-06 14:42:06,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:42:06,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:42:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:07,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:42:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:07,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:42:07,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220476437] [2022-04-06 14:42:07,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220476437] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:42:07,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792472079] [2022-04-06 14:42:07,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:42:07,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:07,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:42:07,488 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:42:07,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 14:42:07,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:42:07,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:42:07,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 14:42:07,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:42:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:07,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:42:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:14,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792472079] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:42:14,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:42:14,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-04-06 14:42:14,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:42:14,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1808239761] [2022-04-06 14:42:14,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1808239761] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:42:14,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:42:14,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 14:42:14,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971242117] [2022-04-06 14:42:14,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:42:14,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 14:42:14,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:14,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 14:42:14,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15237, Invalid=16983, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 14:42:14,202 INFO L87 Difference]: Start difference. First operand 440 states and 525 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:42:18,085 INFO L93 Difference]: Finished difference Result 458 states and 545 transitions. [2022-04-06 14:42:18,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 14:42:18,085 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-04-06 14:42:18,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:42:18,086 INFO L225 Difference]: With dead ends: 458 [2022-04-06 14:42:18,086 INFO L226 Difference]: Without dead ends: 452 [2022-04-06 14:42:18,089 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5286 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=30298, Invalid=41258, Unknown=0, NotChecked=0, Total=71556 [2022-04-06 14:42:18,089 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1492 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:42:18,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1492 Valid, 55 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:42:18,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-04-06 14:42:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 445. [2022-04-06 14:42:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 440 states have (on average 1.1977272727272728) internal successors, (527), 440 states have internal predecessors, (527), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 531 transitions. [2022-04-06 14:42:18,354 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 531 transitions. Word has length 187 [2022-04-06 14:42:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:42:18,354 INFO L478 AbstractCegarLoop]: Abstraction has 445 states and 531 transitions. [2022-04-06 14:42:18,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 89 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 531 transitions. [2022-04-06 14:42:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 14:42:18,355 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:42:18,355 INFO L499 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:42:18,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-06 14:42:18,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:18,571 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:42:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:42:18,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1127108427, now seen corresponding path program 171 times [2022-04-06 14:42:18,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:18,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [968615618] [2022-04-06 14:42:18,572 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:42:18,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1127108427, now seen corresponding path program 172 times [2022-04-06 14:42:18,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:42:18,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769610158] [2022-04-06 14:42:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:42:18,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:42:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:20,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:42:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:20,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:42:20,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769610158] [2022-04-06 14:42:20,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769610158] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:42:20,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936781993] [2022-04-06 14:42:20,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:42:20,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:20,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:42:20,659 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:42:20,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 14:42:20,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:42:20,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:42:20,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 14:42:20,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:42:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:20,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:42:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:24,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936781993] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:42:24,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:42:24,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-04-06 14:42:24,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:42:24,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [968615618] [2022-04-06 14:42:24,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [968615618] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:42:24,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:42:24,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 14:42:24,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695065177] [2022-04-06 14:42:24,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:42:24,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 14:42:24,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:24,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 14:42:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15588, Invalid=17354, Unknown=0, NotChecked=0, Total=32942 [2022-04-06 14:42:24,942 INFO L87 Difference]: Start difference. First operand 445 states and 531 transitions. Second operand has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:42:28,961 INFO L93 Difference]: Finished difference Result 463 states and 551 transitions. [2022-04-06 14:42:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 14:42:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-04-06 14:42:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:42:28,963 INFO L225 Difference]: With dead ends: 463 [2022-04-06 14:42:28,963 INFO L226 Difference]: Without dead ends: 457 [2022-04-06 14:42:28,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5391 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=30998, Invalid=42172, Unknown=0, NotChecked=0, Total=73170 [2022-04-06 14:42:28,967 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1265 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:42:28,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1265 Valid, 55 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:42:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-04-06 14:42:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 450. [2022-04-06 14:42:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 445 states have (on average 1.1977528089887641) internal successors, (533), 445 states have internal predecessors, (533), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 537 transitions. [2022-04-06 14:42:29,238 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 537 transitions. Word has length 189 [2022-04-06 14:42:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:42:29,238 INFO L478 AbstractCegarLoop]: Abstraction has 450 states and 537 transitions. [2022-04-06 14:42:29,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 90 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 537 transitions. [2022-04-06 14:42:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 14:42:29,239 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:42:29,239 INFO L499 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:42:29,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-04-06 14:42:29,454 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:29,455 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:42:29,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:42:29,455 INFO L85 PathProgramCache]: Analyzing trace with hash 460943942, now seen corresponding path program 173 times [2022-04-06 14:42:29,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:29,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [825337023] [2022-04-06 14:42:29,456 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:42:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash 460943942, now seen corresponding path program 174 times [2022-04-06 14:42:29,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:42:29,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013735662] [2022-04-06 14:42:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:42:29,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:42:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:31,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:42:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:31,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:42:31,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013735662] [2022-04-06 14:42:31,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013735662] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:42:31,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047363035] [2022-04-06 14:42:31,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:42:31,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:31,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:42:31,361 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:42:31,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 14:42:31,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2022-04-06 14:42:31,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:42:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 14:42:31,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:42:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:31,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:42:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:38,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047363035] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:42:38,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:42:38,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 184 [2022-04-06 14:42:38,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:42:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [825337023] [2022-04-06 14:42:38,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [825337023] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:42:38,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:42:38,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 14:42:38,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497917891] [2022-04-06 14:42:38,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:42:38,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 14:42:38,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:38,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 14:42:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15943, Invalid=17729, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 14:42:38,179 INFO L87 Difference]: Start difference. First operand 450 states and 537 transitions. Second operand has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:41,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:42:41,714 INFO L93 Difference]: Finished difference Result 468 states and 557 transitions. [2022-04-06 14:42:41,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 14:42:41,714 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-04-06 14:42:41,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:42:41,715 INFO L225 Difference]: With dead ends: 468 [2022-04-06 14:42:41,715 INFO L226 Difference]: Without dead ends: 462 [2022-04-06 14:42:41,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5497 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=31706, Invalid=43096, Unknown=0, NotChecked=0, Total=74802 [2022-04-06 14:42:41,719 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1410 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:42:41,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 70 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:42:41,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-04-06 14:42:41,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 455. [2022-04-06 14:42:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 450 states have (on average 1.1977777777777778) internal successors, (539), 450 states have internal predecessors, (539), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:41,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 543 transitions. [2022-04-06 14:42:41,995 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 543 transitions. Word has length 191 [2022-04-06 14:42:41,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:42:41,995 INFO L478 AbstractCegarLoop]: Abstraction has 455 states and 543 transitions. [2022-04-06 14:42:41,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 91 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 543 transitions. [2022-04-06 14:42:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 14:42:41,996 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:42:41,996 INFO L499 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:42:42,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-06 14:42:42,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:42,213 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:42:42,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:42:42,213 INFO L85 PathProgramCache]: Analyzing trace with hash 227000961, now seen corresponding path program 175 times [2022-04-06 14:42:42,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:42,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1090350553] [2022-04-06 14:42:42,214 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:42:42,214 INFO L85 PathProgramCache]: Analyzing trace with hash 227000961, now seen corresponding path program 176 times [2022-04-06 14:42:42,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:42:42,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620713107] [2022-04-06 14:42:42,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:42:42,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:42:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:44,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:42:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:44,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:42:44,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620713107] [2022-04-06 14:42:44,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620713107] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:42:44,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503540389] [2022-04-06 14:42:44,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:42:44,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:44,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:42:44,160 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:42:44,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 14:42:44,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:42:44,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:42:44,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 14:42:44,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:42:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:44,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:42:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:48,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503540389] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:42:48,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:42:48,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-04-06 14:42:48,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:42:48,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1090350553] [2022-04-06 14:42:48,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1090350553] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:42:48,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:42:48,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-04-06 14:42:48,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295684477] [2022-04-06 14:42:48,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:42:48,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-06 14:42:48,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:48,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-06 14:42:48,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16302, Invalid=18108, Unknown=0, NotChecked=0, Total=34410 [2022-04-06 14:42:48,539 INFO L87 Difference]: Start difference. First operand 455 states and 543 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:52,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:42:52,438 INFO L93 Difference]: Finished difference Result 473 states and 563 transitions. [2022-04-06 14:42:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 14:42:52,439 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-04-06 14:42:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:42:52,440 INFO L225 Difference]: With dead ends: 473 [2022-04-06 14:42:52,440 INFO L226 Difference]: Without dead ends: 467 [2022-04-06 14:42:52,443 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5604 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=32422, Invalid=44030, Unknown=0, NotChecked=0, Total=76452 [2022-04-06 14:42:52,443 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1324 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:42:52,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1324 Valid, 60 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:42:52,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-04-06 14:42:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 460. [2022-04-06 14:42:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 455 states have (on average 1.1978021978021978) internal successors, (545), 455 states have internal predecessors, (545), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 549 transitions. [2022-04-06 14:42:52,727 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 549 transitions. Word has length 193 [2022-04-06 14:42:52,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:42:52,727 INFO L478 AbstractCegarLoop]: Abstraction has 460 states and 549 transitions. [2022-04-06 14:42:52,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 92 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:42:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 549 transitions. [2022-04-06 14:42:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 14:42:52,728 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:42:52,728 INFO L499 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:42:52,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-06 14:42:52,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 14:42:52,929 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:42:52,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:42:52,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1253904388, now seen corresponding path program 177 times [2022-04-06 14:42:52,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:42:52,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [272764333] [2022-04-06 14:42:52,930 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:42:52,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1253904388, now seen corresponding path program 178 times [2022-04-06 14:42:52,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:42:52,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140094431] [2022-04-06 14:42:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:42:52,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:42:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:55,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:42:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:42:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:55,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:42:55,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140094431] [2022-04-06 14:42:55,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140094431] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:42:55,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576075859] [2022-04-06 14:42:55,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:42:55,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:42:55,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:42:55,215 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:42:55,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 14:42:55,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:42:55,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:42:55,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 14:42:55,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:42:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:42:55,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:43:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:02,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576075859] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:43:02,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:43:02,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-04-06 14:43:02,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:43:02,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [272764333] [2022-04-06 14:43:02,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [272764333] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:43:02,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:43:02,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 14:43:02,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356276967] [2022-04-06 14:43:02,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:43:02,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 14:43:02,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:02,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 14:43:02,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16665, Invalid=18491, Unknown=0, NotChecked=0, Total=35156 [2022-04-06 14:43:02,590 INFO L87 Difference]: Start difference. First operand 460 states and 549 transitions. Second operand has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:07,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:43:07,258 INFO L93 Difference]: Finished difference Result 478 states and 569 transitions. [2022-04-06 14:43:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 14:43:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-04-06 14:43:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:43:07,260 INFO L225 Difference]: With dead ends: 478 [2022-04-06 14:43:07,260 INFO L226 Difference]: Without dead ends: 472 [2022-04-06 14:43:07,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5712 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=33146, Invalid=44974, Unknown=0, NotChecked=0, Total=78120 [2022-04-06 14:43:07,263 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1319 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:43:07,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 45 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:43:07,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-04-06 14:43:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 465. [2022-04-06 14:43:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 460 states have (on average 1.1978260869565218) internal successors, (551), 460 states have internal predecessors, (551), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 555 transitions. [2022-04-06 14:43:07,542 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 555 transitions. Word has length 195 [2022-04-06 14:43:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:43:07,542 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 555 transitions. [2022-04-06 14:43:07,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 93 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 555 transitions. [2022-04-06 14:43:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 14:43:07,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:43:07,544 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:43:07,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-04-06 14:43:07,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:07,760 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:43:07,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:43:07,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1525197495, now seen corresponding path program 179 times [2022-04-06 14:43:07,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:07,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2049549841] [2022-04-06 14:43:07,761 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:43:07,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1525197495, now seen corresponding path program 180 times [2022-04-06 14:43:07,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:43:07,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941130540] [2022-04-06 14:43:07,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:43:07,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:43:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:09,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:43:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:09,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:43:09,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941130540] [2022-04-06 14:43:09,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941130540] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:43:09,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376681589] [2022-04-06 14:43:09,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:43:09,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:09,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:43:09,352 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:43:09,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 14:43:09,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-04-06 14:43:09,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:43:09,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-06 14:43:09,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:43:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:09,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:43:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:13,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376681589] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:43:13,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:43:13,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-04-06 14:43:13,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:43:13,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2049549841] [2022-04-06 14:43:13,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2049549841] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:43:13,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:43:13,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-04-06 14:43:13,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687467623] [2022-04-06 14:43:13,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:43:13,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-06 14:43:13,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:13,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-06 14:43:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17032, Invalid=18878, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 14:43:13,906 INFO L87 Difference]: Start difference. First operand 465 states and 555 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:18,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:43:18,201 INFO L93 Difference]: Finished difference Result 483 states and 575 transitions. [2022-04-06 14:43:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 14:43:18,201 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-04-06 14:43:18,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:43:18,202 INFO L225 Difference]: With dead ends: 483 [2022-04-06 14:43:18,202 INFO L226 Difference]: Without dead ends: 477 [2022-04-06 14:43:18,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5821 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=33878, Invalid=45928, Unknown=0, NotChecked=0, Total=79806 [2022-04-06 14:43:18,206 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1296 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:43:18,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 70 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:43:18,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-04-06 14:43:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 470. [2022-04-06 14:43:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.1978494623655913) internal successors, (557), 465 states have internal predecessors, (557), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 561 transitions. [2022-04-06 14:43:18,502 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 561 transitions. Word has length 197 [2022-04-06 14:43:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:43:18,502 INFO L478 AbstractCegarLoop]: Abstraction has 470 states and 561 transitions. [2022-04-06 14:43:18,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 94 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:18,502 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 561 transitions. [2022-04-06 14:43:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 14:43:18,503 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:43:18,503 INFO L499 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:43:18,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-04-06 14:43:18,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:18,720 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:43:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:43:18,720 INFO L85 PathProgramCache]: Analyzing trace with hash 772448946, now seen corresponding path program 181 times [2022-04-06 14:43:18,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:18,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [597035450] [2022-04-06 14:43:18,721 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:43:18,721 INFO L85 PathProgramCache]: Analyzing trace with hash 772448946, now seen corresponding path program 182 times [2022-04-06 14:43:18,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:43:18,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648648803] [2022-04-06 14:43:18,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:43:18,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:43:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:20,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:43:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:20,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:43:20,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648648803] [2022-04-06 14:43:20,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648648803] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:43:20,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449265210] [2022-04-06 14:43:20,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:43:20,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:20,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:43:20,332 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:43:20,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 14:43:20,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:43:20,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:43:20,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 14:43:20,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:43:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:20,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:43:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:27,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449265210] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:43:27,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:43:27,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 192 [2022-04-06 14:43:27,409 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:43:27,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [597035450] [2022-04-06 14:43:27,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [597035450] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:43:27,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:43:27,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-04-06 14:43:27,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408931776] [2022-04-06 14:43:27,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:43:27,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 14:43:27,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:27,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 14:43:27,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17403, Invalid=19269, Unknown=0, NotChecked=0, Total=36672 [2022-04-06 14:43:27,412 INFO L87 Difference]: Start difference. First operand 470 states and 561 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:43:31,689 INFO L93 Difference]: Finished difference Result 488 states and 581 transitions. [2022-04-06 14:43:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-06 14:43:31,690 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-04-06 14:43:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:43:31,691 INFO L225 Difference]: With dead ends: 488 [2022-04-06 14:43:31,691 INFO L226 Difference]: Without dead ends: 482 [2022-04-06 14:43:31,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5931 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=34618, Invalid=46892, Unknown=0, NotChecked=0, Total=81510 [2022-04-06 14:43:31,694 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1447 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:43:31,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 55 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:43:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-04-06 14:43:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 475. [2022-04-06 14:43:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 470 states have (on average 1.1978723404255318) internal successors, (563), 470 states have internal predecessors, (563), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 567 transitions. [2022-04-06 14:43:31,996 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 567 transitions. Word has length 199 [2022-04-06 14:43:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:43:31,996 INFO L478 AbstractCegarLoop]: Abstraction has 475 states and 567 transitions. [2022-04-06 14:43:31,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 95 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 567 transitions. [2022-04-06 14:43:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-04-06 14:43:31,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:43:31,998 INFO L499 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:43:32,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-06 14:43:32,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:32,211 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:43:32,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:43:32,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1064400915, now seen corresponding path program 183 times [2022-04-06 14:43:32,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:32,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [407111470] [2022-04-06 14:43:32,212 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:43:32,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1064400915, now seen corresponding path program 184 times [2022-04-06 14:43:32,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:43:32,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115433419] [2022-04-06 14:43:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:43:32,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:43:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:33,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:43:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:33,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:43:33,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115433419] [2022-04-06 14:43:33,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115433419] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:43:33,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702826514] [2022-04-06 14:43:33,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:43:33,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:33,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:43:33,660 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:43:33,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 14:43:33,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:43:33,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:43:33,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 14:43:33,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:43:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:33,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:43:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:39,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702826514] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:43:39,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:43:39,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-04-06 14:43:39,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:43:39,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [407111470] [2022-04-06 14:43:39,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [407111470] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:43:39,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:43:39,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-04-06 14:43:39,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116229317] [2022-04-06 14:43:39,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:43:39,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-06 14:43:39,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:39,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-06 14:43:39,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17778, Invalid=19664, Unknown=0, NotChecked=0, Total=37442 [2022-04-06 14:43:39,204 INFO L87 Difference]: Start difference. First operand 475 states and 567 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:44,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:43:44,033 INFO L93 Difference]: Finished difference Result 493 states and 587 transitions. [2022-04-06 14:43:44,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 14:43:44,033 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-04-06 14:43:44,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:43:44,035 INFO L225 Difference]: With dead ends: 493 [2022-04-06 14:43:44,035 INFO L226 Difference]: Without dead ends: 487 [2022-04-06 14:43:44,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6042 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=35366, Invalid=47866, Unknown=0, NotChecked=0, Total=83232 [2022-04-06 14:43:44,039 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1481 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:43:44,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 45 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:43:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-04-06 14:43:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 480. [2022-04-06 14:43:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 475 states have (on average 1.1978947368421053) internal successors, (569), 475 states have internal predecessors, (569), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 573 transitions. [2022-04-06 14:43:44,348 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 573 transitions. Word has length 201 [2022-04-06 14:43:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:43:44,348 INFO L478 AbstractCegarLoop]: Abstraction has 480 states and 573 transitions. [2022-04-06 14:43:44,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 96 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:44,348 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 573 transitions. [2022-04-06 14:43:44,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 14:43:44,349 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:43:44,349 INFO L499 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:43:44,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 14:43:44,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:44,563 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:43:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:43:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1045558680, now seen corresponding path program 185 times [2022-04-06 14:43:44,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:44,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [539349538] [2022-04-06 14:43:44,564 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:43:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1045558680, now seen corresponding path program 186 times [2022-04-06 14:43:44,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:43:44,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5653698] [2022-04-06 14:43:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:43:44,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:43:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:47,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:43:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:47,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:43:47,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5653698] [2022-04-06 14:43:47,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5653698] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:43:47,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463970659] [2022-04-06 14:43:47,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:43:47,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:47,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:43:47,214 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:43:47,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 14:43:47,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 94 check-sat command(s) [2022-04-06 14:43:47,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:43:47,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 14:43:47,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:43:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:47,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:43:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:52,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463970659] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:43:52,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:43:52,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 196 [2022-04-06 14:43:52,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:43:52,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [539349538] [2022-04-06 14:43:52,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [539349538] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:43:52,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:43:52,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-04-06 14:43:52,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554751470] [2022-04-06 14:43:52,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:43:52,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-06 14:43:52,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:52,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-06 14:43:52,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18157, Invalid=20063, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 14:43:52,446 INFO L87 Difference]: Start difference. First operand 480 states and 573 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:43:56,472 INFO L93 Difference]: Finished difference Result 498 states and 593 transitions. [2022-04-06 14:43:56,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 14:43:56,472 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-04-06 14:43:56,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:43:56,475 INFO L225 Difference]: With dead ends: 498 [2022-04-06 14:43:56,475 INFO L226 Difference]: Without dead ends: 492 [2022-04-06 14:43:56,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6154 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=36122, Invalid=48850, Unknown=0, NotChecked=0, Total=84972 [2022-04-06 14:43:56,479 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1479 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:43:56,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1479 Valid, 40 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:43:56,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-04-06 14:43:56,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 485. [2022-04-06 14:43:56,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 480 states have (on average 1.1979166666666667) internal successors, (575), 480 states have internal predecessors, (575), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 579 transitions. [2022-04-06 14:43:56,795 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 579 transitions. Word has length 203 [2022-04-06 14:43:56,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:43:56,795 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 579 transitions. [2022-04-06 14:43:56,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:43:56,795 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 579 transitions. [2022-04-06 14:43:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-04-06 14:43:56,796 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:43:56,796 INFO L499 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:43:56,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-04-06 14:43:57,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:57,010 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:43:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:43:57,011 INFO L85 PathProgramCache]: Analyzing trace with hash -118040029, now seen corresponding path program 187 times [2022-04-06 14:43:57,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:43:57,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [441566620] [2022-04-06 14:43:57,011 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:43:57,011 INFO L85 PathProgramCache]: Analyzing trace with hash -118040029, now seen corresponding path program 188 times [2022-04-06 14:43:57,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:43:57,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621194583] [2022-04-06 14:43:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:43:57,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:43:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:58,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:43:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:43:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:58,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:43:58,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621194583] [2022-04-06 14:43:58,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621194583] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:43:58,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449602255] [2022-04-06 14:43:58,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:43:58,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:43:58,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:43:58,872 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:43:58,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 14:43:58,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:43:58,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:43:58,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 14:43:58,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:43:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:43:59,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:44:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:44:05,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449602255] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:44:05,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:44:05,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-04-06 14:44:05,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:44:05,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [441566620] [2022-04-06 14:44:05,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [441566620] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:44:05,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:44:05,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-04-06 14:44:05,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361576584] [2022-04-06 14:44:05,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:44:05,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-04-06 14:44:05,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:44:05,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-04-06 14:44:05,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18540, Invalid=20466, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 14:44:05,160 INFO L87 Difference]: Start difference. First operand 485 states and 579 transitions. Second operand has 100 states, 100 states have (on average 2.01) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:44:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:44:09,928 INFO L93 Difference]: Finished difference Result 503 states and 599 transitions. [2022-04-06 14:44:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 14:44:09,928 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-04-06 14:44:09,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:44:09,929 INFO L225 Difference]: With dead ends: 503 [2022-04-06 14:44:09,929 INFO L226 Difference]: Without dead ends: 497 [2022-04-06 14:44:09,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6267 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=36886, Invalid=49844, Unknown=0, NotChecked=0, Total=86730 [2022-04-06 14:44:09,933 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1624 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:44:09,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 55 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:44:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-04-06 14:44:10,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 490. [2022-04-06 14:44:10,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 485 states have (on average 1.1979381443298969) internal successors, (581), 485 states have internal predecessors, (581), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:44:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 585 transitions. [2022-04-06 14:44:10,257 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 585 transitions. Word has length 205 [2022-04-06 14:44:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:44:10,257 INFO L478 AbstractCegarLoop]: Abstraction has 490 states and 585 transitions. [2022-04-06 14:44:10,257 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 98 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:44:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 585 transitions. [2022-04-06 14:44:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-04-06 14:44:10,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:44:10,258 INFO L499 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:44:10,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-04-06 14:44:10,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-04-06 14:44:10,475 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:44:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:44:10,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2125813986, now seen corresponding path program 189 times [2022-04-06 14:44:10,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:44:10,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [138282700] [2022-04-06 14:44:10,476 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:44:10,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2125813986, now seen corresponding path program 190 times [2022-04-06 14:44:10,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:44:10,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152056688] [2022-04-06 14:44:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:44:10,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:44:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:44:12,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:44:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:44:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:44:12,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:44:12,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152056688] [2022-04-06 14:44:12,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152056688] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:44:12,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148769017] [2022-04-06 14:44:12,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:44:12,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:44:12,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:44:12,935 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:44:12,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 14:44:13,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:44:13,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:44:13,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 14:44:13,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:44:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:44:13,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:44:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:44:19,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148769017] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:44:19,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:44:19,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 200 [2022-04-06 14:44:19,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:44:19,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [138282700] [2022-04-06 14:44:19,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [138282700] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:44:19,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:44:19,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-04-06 14:44:19,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139641154] [2022-04-06 14:44:19,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:44:19,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-04-06 14:44:19,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:44:19,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-04-06 14:44:19,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18927, Invalid=20873, Unknown=0, NotChecked=0, Total=39800 [2022-04-06 14:44:19,388 INFO L87 Difference]: Start difference. First operand 490 states and 585 transitions. Second operand has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:44:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:44:24,398 INFO L93 Difference]: Finished difference Result 508 states and 605 transitions. [2022-04-06 14:44:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 14:44:24,398 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-04-06 14:44:24,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:44:24,400 INFO L225 Difference]: With dead ends: 508 [2022-04-06 14:44:24,400 INFO L226 Difference]: Without dead ends: 502 [2022-04-06 14:44:24,404 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6381 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=37658, Invalid=50848, Unknown=0, NotChecked=0, Total=88506 [2022-04-06 14:44:24,404 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1526 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:44:24,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 55 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:44:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-04-06 14:44:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 495. [2022-04-06 14:44:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 490 states have (on average 1.1979591836734693) internal successors, (587), 490 states have internal predecessors, (587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:44:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 591 transitions. [2022-04-06 14:44:24,733 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 591 transitions. Word has length 207 [2022-04-06 14:44:24,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:44:24,733 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 591 transitions. [2022-04-06 14:44:24,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 99 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:44:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 591 transitions. [2022-04-06 14:44:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 14:44:24,734 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:44:24,734 INFO L499 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:44:24,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-04-06 14:44:24,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-04-06 14:44:24,943 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:44:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:44:24,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1138696537, now seen corresponding path program 191 times [2022-04-06 14:44:24,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:44:24,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [430638907] [2022-04-06 14:44:24,944 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:44:24,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1138696537, now seen corresponding path program 192 times [2022-04-06 14:44:24,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:44:24,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994240934] [2022-04-06 14:44:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:44:24,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:44:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:44:27,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:44:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:44:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:44:27,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:44:27,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994240934] [2022-04-06 14:44:27,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994240934] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:44:27,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403697108] [2022-04-06 14:44:27,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:44:27,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:44:27,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:44:27,759 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:44:27,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 14:44:27,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2022-04-06 14:44:27,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:44:27,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 14:44:27,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:44:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:44:28,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:44:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:44:34,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403697108] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:44:34,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:44:34,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2022-04-06 14:44:34,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:44:34,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [430638907] [2022-04-06 14:44:34,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [430638907] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:44:34,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:44:34,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-04-06 14:44:34,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271950974] [2022-04-06 14:44:34,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:44:34,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-06 14:44:34,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:44:34,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-06 14:44:34,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19318, Invalid=21284, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 14:44:34,194 INFO L87 Difference]: Start difference. First operand 495 states and 591 transitions. Second operand has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:44:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:44:39,786 INFO L93 Difference]: Finished difference Result 513 states and 611 transitions. [2022-04-06 14:44:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 14:44:39,786 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-04-06 14:44:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:44:39,787 INFO L225 Difference]: With dead ends: 513 [2022-04-06 14:44:39,787 INFO L226 Difference]: Without dead ends: 507 [2022-04-06 14:44:39,791 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6496 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=38438, Invalid=51862, Unknown=0, NotChecked=0, Total=90300 [2022-04-06 14:44:39,791 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1554 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:44:39,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1554 Valid, 60 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:44:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-04-06 14:44:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 500. [2022-04-06 14:44:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 495 states have (on average 1.197979797979798) internal successors, (593), 495 states have internal predecessors, (593), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:44:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 597 transitions. [2022-04-06 14:44:40,135 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 597 transitions. Word has length 209 [2022-04-06 14:44:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:44:40,135 INFO L478 AbstractCegarLoop]: Abstraction has 500 states and 597 transitions. [2022-04-06 14:44:40,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 100 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:44:40,136 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 597 transitions. [2022-04-06 14:44:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-04-06 14:44:40,137 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:44:40,137 INFO L499 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:44:40,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-04-06 14:44:40,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:44:40,354 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:44:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:44:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1287784236, now seen corresponding path program 193 times [2022-04-06 14:44:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:44:40,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1231153852] [2022-04-06 14:44:40,354 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:44:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1287784236, now seen corresponding path program 194 times [2022-04-06 14:44:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:44:40,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278814184] [2022-04-06 14:44:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:44:40,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:44:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:44:43,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:44:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:44:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:44:43,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:44:43,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278814184] [2022-04-06 14:44:43,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278814184] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:44:43,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187698647] [2022-04-06 14:44:43,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:44:43,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:44:43,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:44:43,164 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:44:43,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 14:44:43,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:44:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:44:43,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 14:44:43,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:44:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:44:43,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:44:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:44:48,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187698647] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:44:48,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:44:48,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-04-06 14:44:48,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:44:48,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1231153852] [2022-04-06 14:44:48,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1231153852] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:44:48,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:44:48,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 14:44:48,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629427735] [2022-04-06 14:44:48,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:44:48,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 14:44:48,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:44:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 14:44:48,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19713, Invalid=21699, Unknown=0, NotChecked=0, Total=41412 [2022-04-06 14:44:48,903 INFO L87 Difference]: Start difference. First operand 500 states and 597 transitions. Second operand has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:44:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:44:54,366 INFO L93 Difference]: Finished difference Result 518 states and 617 transitions. [2022-04-06 14:44:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 14:44:54,366 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-04-06 14:44:54,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:44:54,368 INFO L225 Difference]: With dead ends: 518 [2022-04-06 14:44:54,368 INFO L226 Difference]: Without dead ends: 512 [2022-04-06 14:44:54,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 322 SyntacticMatches, 1 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=39226, Invalid=52886, Unknown=0, NotChecked=0, Total=92112 [2022-04-06 14:44:54,372 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1699 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1699 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:44:54,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1699 Valid, 50 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:44:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-04-06 14:44:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 505. [2022-04-06 14:44:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 500 states have (on average 1.198) internal successors, (599), 500 states have internal predecessors, (599), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:44:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 603 transitions. [2022-04-06 14:44:54,716 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 603 transitions. Word has length 211 [2022-04-06 14:44:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:44:54,716 INFO L478 AbstractCegarLoop]: Abstraction has 505 states and 603 transitions. [2022-04-06 14:44:54,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 101 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:44:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 603 transitions. [2022-04-06 14:44:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 14:44:54,717 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:44:54,718 INFO L499 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:44:54,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-04-06 14:44:54,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:44:54,934 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:44:54,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:44:54,935 INFO L85 PathProgramCache]: Analyzing trace with hash -968565361, now seen corresponding path program 195 times [2022-04-06 14:44:54,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:44:54,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1484868717] [2022-04-06 14:44:54,935 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:44:54,935 INFO L85 PathProgramCache]: Analyzing trace with hash -968565361, now seen corresponding path program 196 times [2022-04-06 14:44:54,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:44:54,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383324132] [2022-04-06 14:44:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:44:54,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:44:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:44:57,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:44:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:44:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:44:57,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:44:57,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383324132] [2022-04-06 14:44:57,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383324132] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:44:57,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497329654] [2022-04-06 14:44:57,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:44:57,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:44:57,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:44:57,123 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:44:57,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 14:44:57,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:44:57,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:44:57,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-06 14:44:57,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:44:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:44:57,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:45:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:45:04,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497329654] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:45:04,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:45:04,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 103, 103] total 206 [2022-04-06 14:45:04,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:45:04,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1484868717] [2022-04-06 14:45:04,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1484868717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:45:04,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:45:04,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-04-06 14:45:04,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332967191] [2022-04-06 14:45:04,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:45:04,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-06 14:45:04,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:45:04,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-06 14:45:04,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20112, Invalid=22118, Unknown=0, NotChecked=0, Total=42230 [2022-04-06 14:45:04,318 INFO L87 Difference]: Start difference. First operand 505 states and 603 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:45:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:45:10,727 INFO L93 Difference]: Finished difference Result 523 states and 623 transitions. [2022-04-06 14:45:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 14:45:10,727 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-04-06 14:45:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:45:10,729 INFO L225 Difference]: With dead ends: 523 [2022-04-06 14:45:10,729 INFO L226 Difference]: Without dead ends: 517 [2022-04-06 14:45:10,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6729 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=40022, Invalid=53920, Unknown=0, NotChecked=0, Total=93942 [2022-04-06 14:45:10,734 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1748 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1748 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:45:10,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1748 Valid, 45 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:45:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-04-06 14:45:11,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 510. [2022-04-06 14:45:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 505 states have (on average 1.198019801980198) internal successors, (605), 505 states have internal predecessors, (605), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:45:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 609 transitions. [2022-04-06 14:45:11,086 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 609 transitions. Word has length 213 [2022-04-06 14:45:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:45:11,086 INFO L478 AbstractCegarLoop]: Abstraction has 510 states and 609 transitions. [2022-04-06 14:45:11,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 102 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:45:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 609 transitions. [2022-04-06 14:45:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-06 14:45:11,088 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:45:11,089 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:45:11,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 14:45:11,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-06 14:45:11,305 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:45:11,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:45:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash 858095498, now seen corresponding path program 197 times [2022-04-06 14:45:11,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:45:11,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1688020727] [2022-04-06 14:45:11,306 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:45:11,307 INFO L85 PathProgramCache]: Analyzing trace with hash 858095498, now seen corresponding path program 198 times [2022-04-06 14:45:11,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:45:11,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498099971] [2022-04-06 14:45:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:45:11,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:45:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:45:14,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:45:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:45:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:45:14,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:45:14,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498099971] [2022-04-06 14:45:14,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498099971] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:45:14,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241142454] [2022-04-06 14:45:14,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:45:14,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:45:14,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:45:14,060 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:45:14,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 14:45:14,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2022-04-06 14:45:14,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:45:14,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 14:45:14,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:45:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:45:14,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:45:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:45:20,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241142454] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:45:20,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:45:20,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 208 [2022-04-06 14:45:20,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:45:20,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1688020727] [2022-04-06 14:45:20,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1688020727] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:45:20,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:45:20,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-04-06 14:45:20,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326793406] [2022-04-06 14:45:20,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:45:20,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-04-06 14:45:20,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:45:20,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-04-06 14:45:20,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 14:45:20,470 INFO L87 Difference]: Start difference. First operand 510 states and 609 transitions. Second operand has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:45:26,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:45:26,729 INFO L93 Difference]: Finished difference Result 526 states and 627 transitions. [2022-04-06 14:45:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-04-06 14:45:26,729 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-04-06 14:45:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:45:26,731 INFO L225 Difference]: With dead ends: 526 [2022-04-06 14:45:26,731 INFO L226 Difference]: Without dead ends: 520 [2022-04-06 14:45:26,735 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6847 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=40826, Invalid=54964, Unknown=0, NotChecked=0, Total=95790 [2022-04-06 14:45:26,736 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1632 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:45:26,736 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1632 Valid, 45 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:45:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-04-06 14:45:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 515. [2022-04-06 14:45:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 510 states have (on average 1.1980392156862745) internal successors, (611), 510 states have internal predecessors, (611), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:45:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 615 transitions. [2022-04-06 14:45:27,111 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 615 transitions. Word has length 215 [2022-04-06 14:45:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:45:27,111 INFO L478 AbstractCegarLoop]: Abstraction has 515 states and 615 transitions. [2022-04-06 14:45:27,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 103 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:45:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 615 transitions. [2022-04-06 14:45:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-04-06 14:45:27,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:45:27,112 INFO L499 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:45:27,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-04-06 14:45:27,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:45:27,328 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:45:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:45:27,328 INFO L85 PathProgramCache]: Analyzing trace with hash -362443067, now seen corresponding path program 199 times [2022-04-06 14:45:27,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:45:27,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [504218569] [2022-04-06 14:45:27,328 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:45:27,329 INFO L85 PathProgramCache]: Analyzing trace with hash -362443067, now seen corresponding path program 200 times [2022-04-06 14:45:27,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:45:27,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113692039] [2022-04-06 14:45:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:45:27,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:45:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:45:29,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:45:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:45:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:45:29,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:45:29,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113692039] [2022-04-06 14:45:29,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113692039] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:45:29,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841020197] [2022-04-06 14:45:29,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:45:29,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:45:29,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:45:29,743 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:45:29,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 14:45:29,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:45:29,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:45:29,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-06 14:45:29,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:45:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 10100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:45:33,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 14:45:33,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841020197] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:45:33,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 14:45:33,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [106] total 207 [2022-04-06 14:45:33,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:45:33,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [504218569] [2022-04-06 14:45:33,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [504218569] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:45:33,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:45:33,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 14:45:33,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599693047] [2022-04-06 14:45:33,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:45:33,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 14:45:33,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:45:33,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 14:45:33,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10511, Invalid=32131, Unknown=0, NotChecked=0, Total=42642 [2022-04-06 14:45:33,780 INFO L87 Difference]: Start difference. First operand 515 states and 615 transitions. Second operand has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:45:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:45:45,882 INFO L93 Difference]: Finished difference Result 10815 states and 11013 transitions. [2022-04-06 14:45:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 14:45:45,883 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-04-06 14:45:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:45:45,914 INFO L225 Difference]: With dead ends: 10815 [2022-04-06 14:45:45,915 INFO L226 Difference]: Without dead ends: 10606 [2022-04-06 14:45:45,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10400 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=10511, Invalid=32131, Unknown=0, NotChecked=0, Total=42642 [2022-04-06 14:45:45,919 INFO L913 BasicCegarLoop]: 117 mSDtfsCounter, 862 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:45:45,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 655 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:45:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10606 states. [2022-04-06 14:45:57,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10606 to 10410. [2022-04-06 14:45:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10410 states, 10405 states have (on average 1.0189332051898126) internal successors, (10602), 10405 states have internal predecessors, (10602), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:45:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10410 states to 10410 states and 10606 transitions. [2022-04-06 14:45:57,100 INFO L78 Accepts]: Start accepts. Automaton has 10410 states and 10606 transitions. Word has length 217 [2022-04-06 14:45:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:45:57,100 INFO L478 AbstractCegarLoop]: Abstraction has 10410 states and 10606 transitions. [2022-04-06 14:45:57,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:45:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 10410 states and 10606 transitions. [2022-04-06 14:45:57,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-04-06 14:45:57,109 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:45:57,110 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:45:57,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-04-06 14:45:57,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:45:57,327 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:45:57,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:45:57,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1594537039, now seen corresponding path program 1 times [2022-04-06 14:45:57,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:45:57,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1074095470] [2022-04-06 14:45:57,328 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:45:57,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1594537039, now seen corresponding path program 2 times [2022-04-06 14:45:57,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:45:57,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575542816] [2022-04-06 14:45:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:45:57,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:45:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:46:00,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:46:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:46:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9902 backedges. 0 proven. 9902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:46:00,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:46:00,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575542816] [2022-04-06 14:46:00,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575542816] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:46:00,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234878985] [2022-04-06 14:46:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:46:00,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:46:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:46:00,153 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:46:00,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 14:46:00,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:46:00,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:46:00,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 14:46:00,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:46:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9902 backedges. 0 proven. 9902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:46:00,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:46:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9902 backedges. 0 proven. 9902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:46:06,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234878985] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:46:06,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:46:06,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 105] total 208 [2022-04-06 14:46:06,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:46:06,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1074095470] [2022-04-06 14:46:06,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1074095470] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:46:06,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:46:06,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-04-06 14:46:06,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790888583] [2022-04-06 14:46:06,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:46:06,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-04-06 14:46:06,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:46:06,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-04-06 14:46:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 14:46:06,607 INFO L87 Difference]: Start difference. First operand 10410 states and 10606 transitions. Second operand has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:46:23,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:46:23,856 INFO L93 Difference]: Finished difference Result 10618 states and 10912 transitions. [2022-04-06 14:46:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-04-06 14:46:23,857 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-04-06 14:46:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:46:23,870 INFO L225 Difference]: With dead ends: 10618 [2022-04-06 14:46:23,870 INFO L226 Difference]: Without dead ends: 10411 [2022-04-06 14:46:23,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 332 SyntacticMatches, 2 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7055 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=41029, Invalid=55381, Unknown=0, NotChecked=0, Total=96410 [2022-04-06 14:46:23,876 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1663 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1663 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:46:23,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1663 Valid, 60 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:46:23,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10411 states. [2022-04-06 14:46:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10411 to 10405. [2022-04-06 14:46:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10405 states, 10400 states have (on average 1.01875) internal successors, (10595), 10400 states have internal predecessors, (10595), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:46:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10405 states to 10405 states and 10599 transitions. [2022-04-06 14:46:34,838 INFO L78 Accepts]: Start accepts. Automaton has 10405 states and 10599 transitions. Word has length 217 [2022-04-06 14:46:34,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:46:34,838 INFO L478 AbstractCegarLoop]: Abstraction has 10405 states and 10599 transitions. [2022-04-06 14:46:34,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 104 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:46:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10405 states and 10599 transitions. [2022-04-06 14:46:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-04-06 14:46:34,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:46:34,846 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:46:34,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-04-06 14:46:35,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 14:46:35,062 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:46:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:46:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash 645254100, now seen corresponding path program 3 times [2022-04-06 14:46:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:46:35,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [981998110] [2022-04-06 14:46:35,063 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:46:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash 645254100, now seen corresponding path program 4 times [2022-04-06 14:46:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:46:35,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139224814] [2022-04-06 14:46:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:46:35,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:46:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:46:38,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:46:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:46:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9906 backedges. 0 proven. 9906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:46:38,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:46:38,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139224814] [2022-04-06 14:46:38,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139224814] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:46:38,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148959986] [2022-04-06 14:46:38,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:46:38,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:46:38,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:46:38,210 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:46:38,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 14:46:38,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:46:38,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:46:38,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 105 conjunts are in the unsatisfiable core [2022-04-06 14:46:38,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:46:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9906 backedges. 0 proven. 9906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:46:38,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:46:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9906 backedges. 0 proven. 9906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:46:44,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148959986] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:46:44,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:46:44,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 208 [2022-04-06 14:46:44,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:46:44,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [981998110] [2022-04-06 14:46:44,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [981998110] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:46:44,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:46:44,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-04-06 14:46:44,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400572999] [2022-04-06 14:46:44,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:46:44,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-04-06 14:46:44,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:46:44,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-04-06 14:46:44,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 14:46:44,985 INFO L87 Difference]: Start difference. First operand 10405 states and 10599 transitions. Second operand has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:47:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:47:01,781 INFO L93 Difference]: Finished difference Result 10614 states and 10906 transitions. [2022-04-06 14:47:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-04-06 14:47:01,782 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-04-06 14:47:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:47:01,796 INFO L225 Difference]: With dead ends: 10614 [2022-04-06 14:47:01,796 INFO L226 Difference]: Without dead ends: 10407 [2022-04-06 14:47:01,802 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7162 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=41232, Invalid=55800, Unknown=0, NotChecked=0, Total=97032 [2022-04-06 14:47:01,802 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1668 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1668 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:47:01,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1668 Valid, 55 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:47:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10407 states. [2022-04-06 14:47:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10407 to 10398. [2022-04-06 14:47:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10398 states, 10393 states have (on average 1.0185701914750314) internal successors, (10586), 10393 states have internal predecessors, (10586), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:47:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10398 states to 10398 states and 10590 transitions. [2022-04-06 14:47:12,591 INFO L78 Accepts]: Start accepts. Automaton has 10398 states and 10590 transitions. Word has length 219 [2022-04-06 14:47:12,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:47:12,591 INFO L478 AbstractCegarLoop]: Abstraction has 10398 states and 10590 transitions. [2022-04-06 14:47:12,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 105 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:47:12,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10398 states and 10590 transitions. [2022-04-06 14:47:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-06 14:47:12,600 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:47:12,600 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:47:12,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-04-06 14:47:12,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 14:47:12,801 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:47:12,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:47:12,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1082583527, now seen corresponding path program 5 times [2022-04-06 14:47:12,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:47:12,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1696464126] [2022-04-06 14:47:12,802 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:47:12,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1082583527, now seen corresponding path program 6 times [2022-04-06 14:47:12,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:47:12,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856584426] [2022-04-06 14:47:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:47:12,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:47:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:47:15,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:47:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:47:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9912 backedges. 0 proven. 9912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:47:15,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:47:15,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856584426] [2022-04-06 14:47:15,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856584426] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:47:15,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812317736] [2022-04-06 14:47:15,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:47:15,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:47:15,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:47:15,841 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:47:15,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 14:47:16,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2022-04-06 14:47:16,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:47:16,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 106 conjunts are in the unsatisfiable core [2022-04-06 14:47:16,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:47:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9912 backedges. 0 proven. 9912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:47:16,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:47:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9912 backedges. 0 proven. 9912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:47:25,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812317736] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:47:25,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:47:25,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 107, 107] total 208 [2022-04-06 14:47:25,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:47:25,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1696464126] [2022-04-06 14:47:25,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1696464126] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:47:25,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:47:25,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-04-06 14:47:25,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189142739] [2022-04-06 14:47:25,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:47:25,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-04-06 14:47:25,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:47:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-04-06 14:47:25,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 14:47:25,163 INFO L87 Difference]: Start difference. First operand 10398 states and 10590 transitions. Second operand has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:47:42,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:47:42,346 INFO L93 Difference]: Finished difference Result 10608 states and 10898 transitions. [2022-04-06 14:47:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-04-06 14:47:42,347 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-04-06 14:47:42,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:47:42,370 INFO L225 Difference]: With dead ends: 10608 [2022-04-06 14:47:42,370 INFO L226 Difference]: Without dead ends: 10401 [2022-04-06 14:47:42,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 342 SyntacticMatches, 2 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7270 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=41435, Invalid=56221, Unknown=0, NotChecked=0, Total=97656 [2022-04-06 14:47:42,376 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1527 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:47:42,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1527 Valid, 65 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:47:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10401 states. [2022-04-06 14:47:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10401 to 10389. [2022-04-06 14:47:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10389 states, 10384 states have (on average 1.0183936825885977) internal successors, (10575), 10384 states have internal predecessors, (10575), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:47:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10389 states to 10389 states and 10579 transitions. [2022-04-06 14:47:53,017 INFO L78 Accepts]: Start accepts. Automaton has 10389 states and 10579 transitions. Word has length 221 [2022-04-06 14:47:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:47:53,017 INFO L478 AbstractCegarLoop]: Abstraction has 10389 states and 10579 transitions. [2022-04-06 14:47:53,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 106 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:47:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10389 states and 10579 transitions. [2022-04-06 14:47:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-04-06 14:47:53,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:47:53,025 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:47:53,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-04-06 14:47:53,242 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:47:53,242 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:47:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:47:53,242 INFO L85 PathProgramCache]: Analyzing trace with hash 617800478, now seen corresponding path program 7 times [2022-04-06 14:47:53,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:47:53,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970734860] [2022-04-06 14:47:53,243 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:47:53,243 INFO L85 PathProgramCache]: Analyzing trace with hash 617800478, now seen corresponding path program 8 times [2022-04-06 14:47:53,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:47:53,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47739899] [2022-04-06 14:47:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:47:53,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:47:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:47:55,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:47:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:47:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 0 proven. 9920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:47:55,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:47:55,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47739899] [2022-04-06 14:47:55,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47739899] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:47:55,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650127482] [2022-04-06 14:47:55,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:47:55,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:47:55,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:47:55,930 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:47:55,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 14:47:56,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:47:56,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:47:56,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 14:47:56,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:47:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 0 proven. 9920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:47:56,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:48:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 0 proven. 9920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:03,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650127482] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:48:03,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:48:03,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 108, 108] total 208 [2022-04-06 14:48:03,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:03,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970734860] [2022-04-06 14:48:03,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970734860] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:03,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:03,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-04-06 14:48:03,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111562197] [2022-04-06 14:48:03,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:03,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-04-06 14:48:03,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-04-06 14:48:03,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 14:48:03,004 INFO L87 Difference]: Start difference. First operand 10389 states and 10579 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:19,815 INFO L93 Difference]: Finished difference Result 10600 states and 10888 transitions. [2022-04-06 14:48:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-04-06 14:48:19,815 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-04-06 14:48:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:19,844 INFO L225 Difference]: With dead ends: 10600 [2022-04-06 14:48:19,844 INFO L226 Difference]: Without dead ends: 10393 [2022-04-06 14:48:19,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 347 SyntacticMatches, 2 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7379 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=41638, Invalid=56644, Unknown=0, NotChecked=0, Total=98282 [2022-04-06 14:48:19,849 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1790 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1790 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:19,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1790 Valid, 40 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:48:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10393 states. [2022-04-06 14:48:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10393 to 10378. [2022-04-06 14:48:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10378 states, 10373 states have (on average 1.0182203798322569) internal successors, (10562), 10373 states have internal predecessors, (10562), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10378 states to 10378 states and 10566 transitions. [2022-04-06 14:48:30,316 INFO L78 Accepts]: Start accepts. Automaton has 10378 states and 10566 transitions. Word has length 223 [2022-04-06 14:48:30,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:48:30,316 INFO L478 AbstractCegarLoop]: Abstraction has 10378 states and 10566 transitions. [2022-04-06 14:48:30,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 107 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:30,317 INFO L276 IsEmpty]: Start isEmpty. Operand 10378 states and 10566 transitions. [2022-04-06 14:48:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-04-06 14:48:30,326 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:30,326 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:30,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-04-06 14:48:30,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:30,543 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:30,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1695710493, now seen corresponding path program 9 times [2022-04-06 14:48:30,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:30,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [10312612] [2022-04-06 14:48:30,544 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:48:30,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1695710493, now seen corresponding path program 10 times [2022-04-06 14:48:30,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:30,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031929387] [2022-04-06 14:48:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:30,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:33,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9930 backedges. 0 proven. 9930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:33,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:33,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031929387] [2022-04-06 14:48:33,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031929387] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:33,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375038612] [2022-04-06 14:48:33,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:48:33,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:33,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:33,184 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:48:33,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 14:48:33,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:48:33,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:48:33,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-06 14:48:33,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:48:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9930 backedges. 0 proven. 9930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:33,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:48:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9930 backedges. 0 proven. 9930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:39,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375038612] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:48:39,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:48:39,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 109, 109] total 208 [2022-04-06 14:48:39,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:39,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [10312612] [2022-04-06 14:48:39,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [10312612] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:39,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:39,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-04-06 14:48:39,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213924267] [2022-04-06 14:48:39,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:39,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-06 14:48:39,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:39,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-06 14:48:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 14:48:39,092 INFO L87 Difference]: Start difference. First operand 10378 states and 10566 transitions. Second operand has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:55,988 INFO L93 Difference]: Finished difference Result 10590 states and 10876 transitions. [2022-04-06 14:48:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-04-06 14:48:55,989 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-04-06 14:48:55,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:55,999 INFO L225 Difference]: With dead ends: 10590 [2022-04-06 14:48:55,999 INFO L226 Difference]: Without dead ends: 10383 [2022-04-06 14:48:56,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 352 SyntacticMatches, 2 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7489 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=41841, Invalid=57069, Unknown=0, NotChecked=0, Total=98910 [2022-04-06 14:48:56,004 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1546 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:56,005 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1546 Valid, 50 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:48:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10383 states. [2022-04-06 14:49:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10383 to 10365. [2022-04-06 14:49:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10365 states, 10360 states have (on average 1.018050193050193) internal successors, (10547), 10360 states have internal predecessors, (10547), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:49:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10365 states to 10365 states and 10551 transitions. [2022-04-06 14:49:06,332 INFO L78 Accepts]: Start accepts. Automaton has 10365 states and 10551 transitions. Word has length 225 [2022-04-06 14:49:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:49:06,332 INFO L478 AbstractCegarLoop]: Abstraction has 10365 states and 10551 transitions. [2022-04-06 14:49:06,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 108 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:49:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 10365 states and 10551 transitions. [2022-04-06 14:49:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 14:49:06,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:49:06,341 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:49:06,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-04-06 14:49:06,557 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-04-06 14:49:06,558 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:49:06,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:49:06,558 INFO L85 PathProgramCache]: Analyzing trace with hash -186694296, now seen corresponding path program 11 times [2022-04-06 14:49:06,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:49:06,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1886892731] [2022-04-06 14:49:06,558 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:49:06,558 INFO L85 PathProgramCache]: Analyzing trace with hash -186694296, now seen corresponding path program 12 times [2022-04-06 14:49:06,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:49:06,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043483489] [2022-04-06 14:49:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:49:06,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:49:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:49:09,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:49:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:49:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9942 backedges. 0 proven. 9942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:49:09,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:49:09,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043483489] [2022-04-06 14:49:09,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043483489] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:49:09,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406085844] [2022-04-06 14:49:09,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:49:09,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:49:09,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:49:09,949 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:49:09,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 14:49:10,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2022-04-06 14:49:10,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:49:10,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 109 conjunts are in the unsatisfiable core [2022-04-06 14:49:10,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:49:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9942 backedges. 0 proven. 9942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:49:10,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:49:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9942 backedges. 0 proven. 9942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:49:17,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406085844] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:49:17,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:49:17,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 110, 110] total 208 [2022-04-06 14:49:17,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:49:17,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1886892731] [2022-04-06 14:49:17,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1886892731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:49:17,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:49:17,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-04-06 14:49:17,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954740888] [2022-04-06 14:49:17,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:49:17,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-04-06 14:49:17,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:49:17,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-04-06 14:49:17,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 14:49:17,255 INFO L87 Difference]: Start difference. First operand 10365 states and 10551 transitions. Second operand has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:49:34,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:49:34,189 INFO L93 Difference]: Finished difference Result 10578 states and 10862 transitions. [2022-04-06 14:49:34,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-04-06 14:49:34,189 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-04-06 14:49:34,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:49:34,199 INFO L225 Difference]: With dead ends: 10578 [2022-04-06 14:49:34,199 INFO L226 Difference]: Without dead ends: 10371 [2022-04-06 14:49:34,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 357 SyntacticMatches, 2 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7600 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=42044, Invalid=57496, Unknown=0, NotChecked=0, Total=99540 [2022-04-06 14:49:34,204 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1946 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1946 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:49:34,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1946 Valid, 50 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:49:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10371 states. [2022-04-06 14:49:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10371 to 10350. [2022-04-06 14:49:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10350 states, 10345 states have (on average 1.0178830352827453) internal successors, (10530), 10345 states have internal predecessors, (10530), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:49:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10350 states to 10350 states and 10534 transitions. [2022-04-06 14:49:44,352 INFO L78 Accepts]: Start accepts. Automaton has 10350 states and 10534 transitions. Word has length 227 [2022-04-06 14:49:44,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:49:44,352 INFO L478 AbstractCegarLoop]: Abstraction has 10350 states and 10534 transitions. [2022-04-06 14:49:44,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 109 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:49:44,353 INFO L276 IsEmpty]: Start isEmpty. Operand 10350 states and 10534 transitions. [2022-04-06 14:49:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-04-06 14:49:44,360 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:49:44,360 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:49:44,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-04-06 14:49:44,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-04-06 14:49:44,575 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:49:44,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:49:44,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1721075027, now seen corresponding path program 13 times [2022-04-06 14:49:44,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:49:44,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [479900712] [2022-04-06 14:49:44,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:49:44,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1721075027, now seen corresponding path program 14 times [2022-04-06 14:49:44,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:49:44,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392440229] [2022-04-06 14:49:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:49:44,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:49:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:49:47,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:49:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:49:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9956 backedges. 0 proven. 9956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:49:47,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:49:47,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392440229] [2022-04-06 14:49:47,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392440229] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:49:47,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158983662] [2022-04-06 14:49:47,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:49:47,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:49:47,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:49:47,868 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:49:47,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 14:49:47,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:49:47,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:49:47,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 110 conjunts are in the unsatisfiable core [2022-04-06 14:49:47,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:49:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9956 backedges. 0 proven. 9956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:49:48,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:49:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9956 backedges. 0 proven. 9956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:49:54,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158983662] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:49:54,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:49:54,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 111, 111] total 208 [2022-04-06 14:49:54,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:49:54,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [479900712] [2022-04-06 14:49:54,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [479900712] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:49:54,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:49:54,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-04-06 14:49:54,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233693738] [2022-04-06 14:49:54,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:49:54,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-04-06 14:49:54,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:49:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-04-06 14:49:54,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 14:49:54,180 INFO L87 Difference]: Start difference. First operand 10350 states and 10534 transitions. Second operand has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:11,016 INFO L93 Difference]: Finished difference Result 10564 states and 10846 transitions. [2022-04-06 14:50:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 14:50:11,016 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-04-06 14:50:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:11,026 INFO L225 Difference]: With dead ends: 10564 [2022-04-06 14:50:11,027 INFO L226 Difference]: Without dead ends: 10357 [2022-04-06 14:50:11,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 362 SyntacticMatches, 2 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7712 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=42247, Invalid=57925, Unknown=0, NotChecked=0, Total=100172 [2022-04-06 14:50:11,033 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1713 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:11,033 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 35 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:50:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10357 states. [2022-04-06 14:50:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10357 to 10333. [2022-04-06 14:50:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10333 states, 10328 states have (on average 1.0177188226181255) internal successors, (10511), 10328 states have internal predecessors, (10511), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10333 states to 10333 states and 10515 transitions. [2022-04-06 14:50:20,945 INFO L78 Accepts]: Start accepts. Automaton has 10333 states and 10515 transitions. Word has length 229 [2022-04-06 14:50:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:50:20,945 INFO L478 AbstractCegarLoop]: Abstraction has 10333 states and 10515 transitions. [2022-04-06 14:50:20,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 110 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 10333 states and 10515 transitions. [2022-04-06 14:50:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-04-06 14:50:20,953 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:50:20,953 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:50:20,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-04-06 14:50:21,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:21,167 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:50:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:50:21,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1207792306, now seen corresponding path program 15 times [2022-04-06 14:50:21,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:21,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [142035202] [2022-04-06 14:50:21,189 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:50:21,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1207792306, now seen corresponding path program 16 times [2022-04-06 14:50:21,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:50:21,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544583905] [2022-04-06 14:50:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:50:21,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:50:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:23,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:50:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:50:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9972 backedges. 0 proven. 9972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:50:23,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:50:23,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544583905] [2022-04-06 14:50:23,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544583905] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:50:23,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620130676] [2022-04-06 14:50:23,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:50:23,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:50:23,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:50:23,697 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:50:23,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 14:50:23,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:50:23,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:50:23,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 111 conjunts are in the unsatisfiable core [2022-04-06 14:50:23,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:50:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9972 backedges. 0 proven. 9972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:50:24,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:50:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9972 backedges. 0 proven. 9972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:50:32,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620130676] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:50:32,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:50:32,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112, 112] total 208 [2022-04-06 14:50:32,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:50:32,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [142035202] [2022-04-06 14:50:32,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [142035202] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:50:32,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:50:32,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-04-06 14:50:32,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805101721] [2022-04-06 14:50:32,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:50:32,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-04-06 14:50:32,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:50:32,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-04-06 14:50:32,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 14:50:32,794 INFO L87 Difference]: Start difference. First operand 10333 states and 10515 transitions. Second operand has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:50:49,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:50:49,336 INFO L93 Difference]: Finished difference Result 10548 states and 10828 transitions. [2022-04-06 14:50:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-04-06 14:50:49,336 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 111 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-04-06 14:50:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:50:49,346 INFO L225 Difference]: With dead ends: 10548 [2022-04-06 14:50:49,346 INFO L226 Difference]: Without dead ends: 10341 [2022-04-06 14:50:49,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 367 SyntacticMatches, 2 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7825 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=42450, Invalid=58356, Unknown=0, NotChecked=0, Total=100806 [2022-04-06 14:50:49,353 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1870 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1870 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:50:49,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1870 Valid, 40 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [766 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:50:49,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10341 states.