/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:24:13,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:24:13,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:24:13,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:24:13,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 23:24:13,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 23:24:13,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 23:24:13,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 23:24:13,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 23:24:13,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 23:24:13,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 23:24:13,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 23:24:13,657 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 23:24:13,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 23:24:13,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 23:24:13,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 23:24:13,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 23:24:13,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 23:24:13,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 23:24:13,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 23:24:13,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 23:24:13,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 23:24:13,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-19 23:24:13,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 23:24:13,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 23:24:13,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 23:24:13,671 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 23:24:13,694 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:24:13,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:24:13,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:24:13,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:24:13,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:24:13,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:24:13,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:24:13,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:24:13,697 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:24:13,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:24:13,697 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:24:13,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:24:13,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:24:13,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:24:13,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:24:13,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:24:13,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:24:13,698 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:24:13,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:24:13,698 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:24:13,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:24:13,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:24:13,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:24:13,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:24:13,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:24:13,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:24:13,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:24:13,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:24:13,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:24:13,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:24:13,699 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:24:13,699 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:24:13,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:24:13,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:24:13,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:24:13,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:24:13,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:24:13,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:24:13,874 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:24:13,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-03-19 23:24:13,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb308e800/d338f7159c844080b3bb585596a37e06/FLAGc3b45fd13 [2022-03-19 23:24:14,216 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:24:14,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c [2022-03-19 23:24:14,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb308e800/d338f7159c844080b3bb585596a37e06/FLAGc3b45fd13 [2022-03-19 23:24:14,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb308e800/d338f7159c844080b3bb585596a37e06 [2022-03-19 23:24:14,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:24:14,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:24:14,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:24:14,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:24:14,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:24:14,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:24:14" (1/1) ... [2022-03-19 23:24:14,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d3bad70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:14, skipping insertion in model container [2022-03-19 23:24:14,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:24:14" (1/1) ... [2022-03-19 23:24:14,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:24:14,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:24:14,801 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c[373,386] [2022-03-19 23:24:14,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:24:14,830 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:24:14,839 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/watermelon.c[373,386] [2022-03-19 23:24:14,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:24:14,857 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:24:14,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:14 WrapperNode [2022-03-19 23:24:14,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:24:14,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:24:14,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:24:14,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:24:14,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:14" (1/1) ... [2022-03-19 23:24:14,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:14" (1/1) ... [2022-03-19 23:24:14,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:14" (1/1) ... [2022-03-19 23:24:14,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:14" (1/1) ... [2022-03-19 23:24:14,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:14" (1/1) ... [2022-03-19 23:24:14,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:14" (1/1) ... [2022-03-19 23:24:14,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:14" (1/1) ... [2022-03-19 23:24:14,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:24:14,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:24:14,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:24:14,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:24:14,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:14" (1/1) ... [2022-03-19 23:24:14,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:24:14,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:14,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 23:24:14,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 23:24:14,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:24:14,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:24:14,932 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:24:14,932 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:24:14,933 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2022-03-19 23:24:14,933 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2022-03-19 23:24:14,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:24:14,933 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:24:14,933 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:24:14,933 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:24:14,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:24:14,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 23:24:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:24:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2022-03-19 23:24:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2022-03-19 23:24:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:24:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:24:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:24:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:24:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:24:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:24:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:24:14,978 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:24:14,979 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:24:15,129 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:24:15,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:24:15,133 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 23:24:15,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:24:15 BoogieIcfgContainer [2022-03-19 23:24:15,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:24:15,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:24:15,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:24:15,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:24:15,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:24:14" (1/3) ... [2022-03-19 23:24:15,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a7cc0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:24:15, skipping insertion in model container [2022-03-19 23:24:15,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:14" (2/3) ... [2022-03-19 23:24:15,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a7cc0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:24:15, skipping insertion in model container [2022-03-19 23:24:15,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:24:15" (3/3) ... [2022-03-19 23:24:15,155 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.c [2022-03-19 23:24:15,158 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:24:15,158 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:24:15,219 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:24:15,224 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 23:24:15,225 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:24:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 23:24:15,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 23:24:15,244 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:15,245 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:15,245 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash 345664661, now seen corresponding path program 1 times [2022-03-19 23:24:15,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:15,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024109230] [2022-03-19 23:24:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:15,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:15,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:15,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:15,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 23:24:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:15,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:15,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024109230] [2022-03-19 23:24:15,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024109230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:24:15,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:24:15,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 23:24:15,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619317855] [2022-03-19 23:24:15,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:24:15,616 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 23:24:15,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:15,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 23:24:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-19 23:24:15,633 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 29 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:16,070 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-03-19 23:24:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 23:24:16,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-03-19 23:24:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:16,077 INFO L225 Difference]: With dead ends: 91 [2022-03-19 23:24:16,077 INFO L226 Difference]: Without dead ends: 42 [2022-03-19 23:24:16,080 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-19 23:24:16,082 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:16,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 89 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:24:16,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-19 23:24:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-03-19 23:24:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:24:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-03-19 23:24:16,107 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2022-03-19 23:24:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:16,107 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-03-19 23:24:16,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-03-19 23:24:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 23:24:16,109 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:16,109 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:16,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:24:16,109 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:16,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:16,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1324779677, now seen corresponding path program 1 times [2022-03-19 23:24:16,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:16,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46729513] [2022-03-19 23:24:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:16,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 23:24:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:16,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:16,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46729513] [2022-03-19 23:24:16,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46729513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:24:16,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:24:16,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:24:16,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667621576] [2022-03-19 23:24:16,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:24:16,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:24:16,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:24:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:24:16,157 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:24:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:16,203 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-03-19 23:24:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:24:16,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-03-19 23:24:16,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:16,204 INFO L225 Difference]: With dead ends: 55 [2022-03-19 23:24:16,204 INFO L226 Difference]: Without dead ends: 42 [2022-03-19 23:24:16,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:24:16,205 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:16,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:24:16,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-19 23:24:16,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-19 23:24:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:24:16,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-03-19 23:24:16,211 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2022-03-19 23:24:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:16,211 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-03-19 23:24:16,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:24:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-03-19 23:24:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 23:24:16,212 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:16,212 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:16,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:24:16,213 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:16,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:16,213 INFO L85 PathProgramCache]: Analyzing trace with hash -855151641, now seen corresponding path program 1 times [2022-03-19 23:24:16,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:16,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094679384] [2022-03-19 23:24:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:16,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 23:24:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:16,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:16,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094679384] [2022-03-19 23:24:16,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094679384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:24:16,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:24:16,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:24:16,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625624582] [2022-03-19 23:24:16,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:24:16,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:24:16,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:24:16,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:24:16,259 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:16,303 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-03-19 23:24:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:24:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-03-19 23:24:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:16,304 INFO L225 Difference]: With dead ends: 72 [2022-03-19 23:24:16,304 INFO L226 Difference]: Without dead ends: 43 [2022-03-19 23:24:16,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:24:16,305 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:16,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:24:16,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-19 23:24:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-03-19 23:24:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:24:16,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-03-19 23:24:16,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 27 [2022-03-19 23:24:16,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:16,311 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-03-19 23:24:16,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-03-19 23:24:16,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 23:24:16,312 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:16,312 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:16,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 23:24:16,312 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash 743790053, now seen corresponding path program 1 times [2022-03-19 23:24:16,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:16,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311597435] [2022-03-19 23:24:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:16,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 23:24:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:16,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:16,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311597435] [2022-03-19 23:24:16,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311597435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:16,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976970937] [2022-03-19 23:24:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:16,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:16,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:16,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:16,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:24:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 23:24:16,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:24:16,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:24:16,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976970937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:24:16,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:24:16,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2022-03-19 23:24:16,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970373775] [2022-03-19 23:24:16,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:24:16,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 23:24:16,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:16,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 23:24:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:24:16,603 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:16,659 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-03-19 23:24:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:24:16,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-19 23:24:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:16,660 INFO L225 Difference]: With dead ends: 56 [2022-03-19 23:24:16,660 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 23:24:16,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:24:16,661 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:16,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 129 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:24:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 23:24:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-03-19 23:24:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:24:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-19 23:24:16,667 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2022-03-19 23:24:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:16,667 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-19 23:24:16,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-19 23:24:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 23:24:16,667 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:16,668 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:16,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:16,881 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:16,883 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash 198429957, now seen corresponding path program 1 times [2022-03-19 23:24:16,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:16,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158995015] [2022-03-19 23:24:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:16,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 23:24:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:16,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:16,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158995015] [2022-03-19 23:24:16,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158995015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:16,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472111751] [2022-03-19 23:24:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:16,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:16,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:16,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:24:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:16,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 23:24:16,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:17,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:17,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472111751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:17,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:17,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-03-19 23:24:17,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366279971] [2022-03-19 23:24:17,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:17,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 23:24:17,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:17,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 23:24:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:24:17,087 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:17,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:17,164 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-03-19 23:24:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:24:17,164 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-03-19 23:24:17,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:17,165 INFO L225 Difference]: With dead ends: 74 [2022-03-19 23:24:17,165 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 23:24:17,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:24:17,168 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:17,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 38 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:24:17,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 23:24:17,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-03-19 23:24:17,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:24:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-03-19 23:24:17,183 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 29 [2022-03-19 23:24:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:17,184 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-03-19 23:24:17,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:24:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-03-19 23:24:17,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 23:24:17,185 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:17,185 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:17,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:17,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:17,401 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:17,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:17,402 INFO L85 PathProgramCache]: Analyzing trace with hash -921936221, now seen corresponding path program 2 times [2022-03-19 23:24:17,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:17,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715794492] [2022-03-19 23:24:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:17,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:17,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:17,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:17,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:24:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:24:17,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:17,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715794492] [2022-03-19 23:24:17,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715794492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:24:17,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:24:17,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 23:24:17,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79498538] [2022-03-19 23:24:17,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:24:17,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 23:24:17,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:17,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 23:24:17,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:24:17,516 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:17,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:17,679 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-03-19 23:24:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 23:24:17,679 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-19 23:24:17,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:17,683 INFO L225 Difference]: With dead ends: 53 [2022-03-19 23:24:17,683 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 23:24:17,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:24:17,689 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:17,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 52 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:24:17,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 23:24:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-19 23:24:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:24:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-03-19 23:24:17,698 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 31 [2022-03-19 23:24:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:17,698 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-03-19 23:24:17,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-03-19 23:24:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 23:24:17,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:17,699 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:17,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 23:24:17,700 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1006640075, now seen corresponding path program 1 times [2022-03-19 23:24:17,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:17,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687728757] [2022-03-19 23:24:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:17,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:17,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:17,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:17,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:24:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:24:17,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:17,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687728757] [2022-03-19 23:24:17,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687728757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:17,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777665289] [2022-03-19 23:24:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:17,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:17,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:17,809 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:17,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:24:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 23:24:17,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:24:17,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:24:17,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777665289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:17,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:17,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2022-03-19 23:24:17,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300222307] [2022-03-19 23:24:17,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:17,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 23:24:17,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:17,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 23:24:17,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:24:17,987 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:24:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:18,125 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-03-19 23:24:18,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 23:24:18,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-03-19 23:24:18,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:18,126 INFO L225 Difference]: With dead ends: 73 [2022-03-19 23:24:18,126 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 23:24:18,127 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:24:18,127 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:18,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:24:18,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 23:24:18,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-19 23:24:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:24:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-03-19 23:24:18,132 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-03-19 23:24:18,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:18,132 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-03-19 23:24:18,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 23:24:18,133 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-03-19 23:24:18,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 23:24:18,133 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:18,133 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:18,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:18,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:18,347 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:18,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1072065907, now seen corresponding path program 1 times [2022-03-19 23:24:18,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:18,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336098940] [2022-03-19 23:24:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:18,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:18,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:18,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:18,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:24:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:24:18,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:18,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336098940] [2022-03-19 23:24:18,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336098940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:18,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958694796] [2022-03-19 23:24:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:18,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:18,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:18,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:18,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:24:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:18,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 23:24:18,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:24:18,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:24:18,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958694796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:18,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:18,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-03-19 23:24:18,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670048381] [2022-03-19 23:24:18,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:18,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 23:24:18,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:18,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 23:24:18,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:24:18,583 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:24:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:18,720 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2022-03-19 23:24:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:24:18,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-03-19 23:24:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:18,722 INFO L225 Difference]: With dead ends: 65 [2022-03-19 23:24:18,722 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 23:24:18,735 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-03-19 23:24:18,736 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:18,736 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 46 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:24:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 23:24:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-03-19 23:24:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 23:24:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-03-19 23:24:18,741 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 37 [2022-03-19 23:24:18,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:18,741 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-03-19 23:24:18,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 23:24:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-03-19 23:24:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 23:24:18,742 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:18,742 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:18,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:18,945 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:18,945 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:18,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1752124277, now seen corresponding path program 1 times [2022-03-19 23:24:18,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:18,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339662287] [2022-03-19 23:24:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:18,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:18,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:18,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:19,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:24:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 23:24:19,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:19,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339662287] [2022-03-19 23:24:19,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339662287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:24:19,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:24:19,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 23:24:19,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577443267] [2022-03-19 23:24:19,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:24:19,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 23:24:19,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:19,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 23:24:19,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-19 23:24:19,029 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:19,240 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-03-19 23:24:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 23:24:19,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-03-19 23:24:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:19,242 INFO L225 Difference]: With dead ends: 60 [2022-03-19 23:24:19,242 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 23:24:19,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-03-19 23:24:19,256 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:19,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 69 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:24:19,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 23:24:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-03-19 23:24:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-03-19 23:24:19,267 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 37 [2022-03-19 23:24:19,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:19,268 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-03-19 23:24:19,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:19,268 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-03-19 23:24:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 23:24:19,268 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:19,269 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:19,269 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-19 23:24:19,269 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:19,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2030931829, now seen corresponding path program 2 times [2022-03-19 23:24:19,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:19,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998133030] [2022-03-19 23:24:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:19,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:19,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:19,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:19,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:24:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:19,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998133030] [2022-03-19 23:24:19,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998133030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314167424] [2022-03-19 23:24:19,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:24:19,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:19,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:19,414 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:19,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:24:19,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:24:19,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:19,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 23:24:19,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:19,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:20,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314167424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:20,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:20,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2022-03-19 23:24:20,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024641325] [2022-03-19 23:24:20,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:20,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 23:24:20,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:20,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 23:24:20,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-03-19 23:24:20,136 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:20,441 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-03-19 23:24:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 23:24:20,441 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-03-19 23:24:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:20,442 INFO L225 Difference]: With dead ends: 67 [2022-03-19 23:24:20,442 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 23:24:20,443 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 23:24:20,443 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:20,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 67 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:24:20,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 23:24:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-03-19 23:24:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-03-19 23:24:20,447 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 39 [2022-03-19 23:24:20,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:20,447 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-03-19 23:24:20,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:20,447 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-03-19 23:24:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 23:24:20,448 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:20,448 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:20,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:20,648 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 23:24:20,648 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:20,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1514673707, now seen corresponding path program 2 times [2022-03-19 23:24:20,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:20,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720130465] [2022-03-19 23:24:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:20,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:20,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:20,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:20,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:24:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:20,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:20,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720130465] [2022-03-19 23:24:20,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720130465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:20,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14894716] [2022-03-19 23:24:20,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:24:20,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:20,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:20,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:20,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:24:20,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:24:20,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:20,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 23:24:20,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:21,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:21,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14894716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:21,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:21,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2022-03-19 23:24:21,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282379408] [2022-03-19 23:24:21,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:21,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 23:24:21,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 23:24:21,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-03-19 23:24:21,424 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:21,727 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2022-03-19 23:24:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 23:24:21,727 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-03-19 23:24:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:21,728 INFO L225 Difference]: With dead ends: 61 [2022-03-19 23:24:21,728 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 23:24:21,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 23:24:21,729 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:21,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 75 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:24:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 23:24:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-19 23:24:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-03-19 23:24:21,733 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 39 [2022-03-19 23:24:21,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:21,733 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-03-19 23:24:21,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-03-19 23:24:21,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 23:24:21,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:21,734 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:21,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:21,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:21,935 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:21,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:21,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1355746345, now seen corresponding path program 3 times [2022-03-19 23:24:21,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:21,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666473138] [2022-03-19 23:24:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:21,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:21,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:21,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:22,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:24:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:22,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:22,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666473138] [2022-03-19 23:24:22,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666473138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:22,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378419765] [2022-03-19 23:24:22,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:24:22,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:22,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:22,082 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:22,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:24:22,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 23:24:22,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:22,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 23:24:22,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:22,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:22,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378419765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:22,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:22,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-03-19 23:24:22,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132432775] [2022-03-19 23:24:22,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:22,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 23:24:22,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:22,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 23:24:22,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 23:24:22,882 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:23,336 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2022-03-19 23:24:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 23:24:23,337 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-03-19 23:24:23,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:23,337 INFO L225 Difference]: With dead ends: 74 [2022-03-19 23:24:23,337 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 23:24:23,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=2501, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 23:24:23,338 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:23,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 87 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 23:24:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2022-03-19 23:24:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-03-19 23:24:23,342 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 41 [2022-03-19 23:24:23,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:23,342 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-03-19 23:24:23,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-03-19 23:24:23,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 23:24:23,343 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:23,343 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:23,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:23,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:23,560 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2125149075, now seen corresponding path program 3 times [2022-03-19 23:24:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:23,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208719053] [2022-03-19 23:24:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:23,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:23,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:23,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:23,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:24:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:23,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:23,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208719053] [2022-03-19 23:24:23,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208719053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:23,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751112202] [2022-03-19 23:24:23,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:24:23,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:23,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:23,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:23,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:24:23,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 23:24:23,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:23,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 23:24:23,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:24,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:24,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751112202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:24,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:24,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-03-19 23:24:24,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953233757] [2022-03-19 23:24:24,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:24,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 23:24:24,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:24,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 23:24:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 23:24:24,487 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:24,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:24,952 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-03-19 23:24:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 23:24:24,953 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-03-19 23:24:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:24,954 INFO L225 Difference]: With dead ends: 69 [2022-03-19 23:24:24,954 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 23:24:24,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=469, Invalid=2501, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 23:24:24,955 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 112 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:24,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 80 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:24,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 23:24:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-03-19 23:24:24,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-19 23:24:24,959 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2022-03-19 23:24:24,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:24,959 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-19 23:24:24,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-19 23:24:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 23:24:24,960 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:24,960 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:24,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-19 23:24:25,160 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,SelfDestructingSolverStorable12 [2022-03-19 23:24:25,161 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash 431574421, now seen corresponding path program 4 times [2022-03-19 23:24:25,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:25,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945833674] [2022-03-19 23:24:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:25,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:25,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:25,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:25,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:24:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:25,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:25,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945833674] [2022-03-19 23:24:25,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945833674] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:25,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260728080] [2022-03-19 23:24:25,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:24:25,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:25,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:25,309 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:25,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 23:24:25,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:24:25,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:25,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:24:25,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:25,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:25,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260728080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:25,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:25,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2022-03-19 23:24:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752223870] [2022-03-19 23:24:25,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:25,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 23:24:25,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 23:24:25,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 23:24:25,953 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:26,334 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2022-03-19 23:24:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 23:24:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-03-19 23:24:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:26,335 INFO L225 Difference]: With dead ends: 71 [2022-03-19 23:24:26,335 INFO L226 Difference]: Without dead ends: 59 [2022-03-19 23:24:26,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 23:24:26,336 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:26,336 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 92 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-19 23:24:26,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-03-19 23:24:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-03-19 23:24:26,339 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 43 [2022-03-19 23:24:26,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:26,339 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-03-19 23:24:26,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:26,340 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-03-19 23:24:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 23:24:26,340 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:26,340 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:26,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:26,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 23:24:26,547 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:26,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1007286155, now seen corresponding path program 4 times [2022-03-19 23:24:26,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:26,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386578867] [2022-03-19 23:24:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:26,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:26,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:26,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:26,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:24:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:26,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:26,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386578867] [2022-03-19 23:24:26,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386578867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:26,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54179391] [2022-03-19 23:24:26,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:24:26,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:26,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:26,734 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:26,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 23:24:26,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:24:26,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:26,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:24:26,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:26,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:27,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54179391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:27,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:27,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2022-03-19 23:24:27,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655376605] [2022-03-19 23:24:27,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:27,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 23:24:27,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:27,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 23:24:27,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 23:24:27,344 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:27,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:27,733 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-03-19 23:24:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 23:24:27,733 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-03-19 23:24:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:27,734 INFO L225 Difference]: With dead ends: 65 [2022-03-19 23:24:27,734 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 23:24:27,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 23:24:27,738 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:27,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 90 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:27,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 23:24:27,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-19 23:24:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 44 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-19 23:24:27,747 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 43 [2022-03-19 23:24:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:27,748 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-19 23:24:27,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:27,748 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-19 23:24:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 23:24:27,748 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:27,748 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:27,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-19 23:24:27,963 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,SelfDestructingSolverStorable14 [2022-03-19 23:24:27,963 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:27,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:27,964 INFO L85 PathProgramCache]: Analyzing trace with hash 912386679, now seen corresponding path program 5 times [2022-03-19 23:24:27,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:27,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807751824] [2022-03-19 23:24:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:27,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:27,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:28,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:28,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:24:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:28,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:28,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807751824] [2022-03-19 23:24:28,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807751824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:28,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058293706] [2022-03-19 23:24:28,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:24:28,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:28,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:28,147 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:28,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 23:24:28,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:24:28,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:28,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 23:24:28,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:28,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:28,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058293706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:28,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:28,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2022-03-19 23:24:28,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189781654] [2022-03-19 23:24:28,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:28,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 23:24:28,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:28,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 23:24:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 23:24:28,961 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:29,410 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2022-03-19 23:24:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 23:24:29,411 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-03-19 23:24:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:29,411 INFO L225 Difference]: With dead ends: 78 [2022-03-19 23:24:29,411 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 23:24:29,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=3301, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 23:24:29,412 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:29,413 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 62 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 23:24:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-03-19 23:24:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-03-19 23:24:29,417 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 45 [2022-03-19 23:24:29,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:29,417 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-03-19 23:24:29,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-03-19 23:24:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 23:24:29,417 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:29,417 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:29,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:29,627 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,SelfDestructingSolverStorable15 [2022-03-19 23:24:29,627 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:29,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:29,628 INFO L85 PathProgramCache]: Analyzing trace with hash 294367923, now seen corresponding path program 5 times [2022-03-19 23:24:29,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:29,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177669222] [2022-03-19 23:24:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:29,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:29,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:29,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:29,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:24:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:29,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:29,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177669222] [2022-03-19 23:24:29,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177669222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:29,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665153992] [2022-03-19 23:24:29,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:24:29,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:29,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:29,812 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:29,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 23:24:29,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 23:24:29,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:29,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 23:24:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:30,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:30,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665153992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:30,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:30,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2022-03-19 23:24:30,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260328592] [2022-03-19 23:24:30,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:30,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 23:24:30,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:30,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 23:24:30,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 23:24:30,610 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:31,088 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-03-19 23:24:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 23:24:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-03-19 23:24:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:31,089 INFO L225 Difference]: With dead ends: 73 [2022-03-19 23:24:31,089 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 23:24:31,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=3301, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 23:24:31,091 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 109 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:31,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 90 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:31,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 23:24:31,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-03-19 23:24:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-03-19 23:24:31,094 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 45 [2022-03-19 23:24:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:31,095 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-03-19 23:24:31,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-03-19 23:24:31,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 23:24:31,095 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:31,095 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:31,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:31,307 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,SelfDestructingSolverStorable16 [2022-03-19 23:24:31,307 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:31,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1987478709, now seen corresponding path program 6 times [2022-03-19 23:24:31,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:31,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127772839] [2022-03-19 23:24:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:31,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:31,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:31,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:31,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 23:24:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:31,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:31,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127772839] [2022-03-19 23:24:31,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127772839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:31,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853888162] [2022-03-19 23:24:31,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:24:31,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:31,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:31,484 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:31,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 23:24:31,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 23:24:31,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:24:31,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:31,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:32,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853888162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:32,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:32,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2022-03-19 23:24:32,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890558228] [2022-03-19 23:24:32,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:32,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 23:24:32,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:32,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 23:24:32,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 23:24:32,272 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:32,655 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-03-19 23:24:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 23:24:32,656 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-03-19 23:24:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:32,657 INFO L225 Difference]: With dead ends: 75 [2022-03-19 23:24:32,657 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 23:24:32,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 23:24:32,658 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:32,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 67 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:32,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 23:24:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-03-19 23:24:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-03-19 23:24:32,662 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 47 [2022-03-19 23:24:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:32,662 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-03-19 23:24:32,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:32,662 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-03-19 23:24:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 23:24:32,662 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:32,663 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:32,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-19 23:24:32,863 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,SelfDestructingSolverStorable17 [2022-03-19 23:24:32,863 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:32,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:32,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2094039019, now seen corresponding path program 6 times [2022-03-19 23:24:32,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:32,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733294609] [2022-03-19 23:24:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:32,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:32,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:32,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:32,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:24:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:33,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:33,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733294609] [2022-03-19 23:24:33,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733294609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:33,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243798650] [2022-03-19 23:24:33,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:24:33,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:33,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:33,042 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:33,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 23:24:33,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 23:24:33,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:33,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:24:33,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:33,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:33,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243798650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:33,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:33,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2022-03-19 23:24:33,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107324504] [2022-03-19 23:24:33,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:33,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 23:24:33,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:33,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 23:24:33,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 23:24:33,726 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:34,135 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-03-19 23:24:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 23:24:34,135 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-03-19 23:24:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:34,136 INFO L225 Difference]: With dead ends: 69 [2022-03-19 23:24:34,136 INFO L226 Difference]: Without dead ends: 59 [2022-03-19 23:24:34,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 23:24:34,137 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:34,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 100 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-19 23:24:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-19 23:24:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-03-19 23:24:34,141 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 47 [2022-03-19 23:24:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:34,141 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-03-19 23:24:34,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:34,141 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-03-19 23:24:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 23:24:34,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:34,142 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:34,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:34,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:34,343 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash 219937303, now seen corresponding path program 7 times [2022-03-19 23:24:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:34,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594549798] [2022-03-19 23:24:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:34,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:34,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:34,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:34,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:24:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:34,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:34,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594549798] [2022-03-19 23:24:34,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594549798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:34,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771559986] [2022-03-19 23:24:34,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:24:34,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:34,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:34,533 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:34,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 23:24:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:34,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 23:24:34,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:34,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:35,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771559986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:35,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:35,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2022-03-19 23:24:35,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020337253] [2022-03-19 23:24:35,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:35,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 23:24:35,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:35,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 23:24:35,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:24:35,445 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:35,970 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-03-19 23:24:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:24:35,971 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-03-19 23:24:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:35,971 INFO L225 Difference]: With dead ends: 82 [2022-03-19 23:24:35,971 INFO L226 Difference]: Without dead ends: 71 [2022-03-19 23:24:35,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 23:24:35,973 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:35,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 97 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-19 23:24:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-03-19 23:24:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-03-19 23:24:35,977 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 49 [2022-03-19 23:24:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:35,977 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-03-19 23:24:35,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-03-19 23:24:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 23:24:35,977 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:35,978 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:35,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:36,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:36,187 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:36,188 INFO L85 PathProgramCache]: Analyzing trace with hash -969594157, now seen corresponding path program 7 times [2022-03-19 23:24:36,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:36,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462868729] [2022-03-19 23:24:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:36,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:36,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:36,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:36,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:24:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:36,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:36,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462868729] [2022-03-19 23:24:36,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462868729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:36,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268564564] [2022-03-19 23:24:36,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:24:36,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:36,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:36,395 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:36,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 23:24:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:36,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 23:24:36,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:36,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:37,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268564564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:37,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:37,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2022-03-19 23:24:37,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511779280] [2022-03-19 23:24:37,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:37,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 23:24:37,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:37,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 23:24:37,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:24:37,266 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:37,783 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2022-03-19 23:24:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:24:37,783 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-03-19 23:24:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:37,783 INFO L225 Difference]: With dead ends: 77 [2022-03-19 23:24:37,784 INFO L226 Difference]: Without dead ends: 68 [2022-03-19 23:24:37,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 23:24:37,785 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 146 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:37,785 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 80 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-19 23:24:37,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-03-19 23:24:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-03-19 23:24:37,789 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 49 [2022-03-19 23:24:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:37,789 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-03-19 23:24:37,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 50 states have internal predecessors, (98), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-03-19 23:24:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 23:24:37,790 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:37,790 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:37,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:37,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:37,999 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1499302699, now seen corresponding path program 8 times [2022-03-19 23:24:38,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:38,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621026302] [2022-03-19 23:24:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:38,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:38,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:38,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:38,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 23:24:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:38,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:38,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621026302] [2022-03-19 23:24:38,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621026302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:38,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835480103] [2022-03-19 23:24:38,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:24:38,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:38,177 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:38,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 23:24:38,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:24:38,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:38,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 23:24:38,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:38,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:39,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835480103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:39,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:39,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2022-03-19 23:24:39,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841191082] [2022-03-19 23:24:39,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:39,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 23:24:39,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:39,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 23:24:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 23:24:39,049 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:39,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:39,487 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2022-03-19 23:24:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 23:24:39,489 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-19 23:24:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:39,489 INFO L225 Difference]: With dead ends: 79 [2022-03-19 23:24:39,489 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 23:24:39,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 23:24:39,490 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 92 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:39,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 87 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:39,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 23:24:39,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2022-03-19 23:24:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-03-19 23:24:39,495 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 51 [2022-03-19 23:24:39,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:39,495 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-03-19 23:24:39,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-03-19 23:24:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 23:24:39,496 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:39,496 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:39,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-19 23:24:39,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:39,713 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:39,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1741263029, now seen corresponding path program 8 times [2022-03-19 23:24:39,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:39,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385545795] [2022-03-19 23:24:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:39,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:39,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:39,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:39,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:24:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:39,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:39,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385545795] [2022-03-19 23:24:39,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385545795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:39,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650629229] [2022-03-19 23:24:39,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:24:39,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:39,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:39,901 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:39,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 23:24:39,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:24:39,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:39,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 23:24:39,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:40,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:40,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650629229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:40,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:40,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2022-03-19 23:24:40,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501766432] [2022-03-19 23:24:40,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:40,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 23:24:40,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:40,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 23:24:40,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 23:24:40,709 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:41,126 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2022-03-19 23:24:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 23:24:41,126 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-03-19 23:24:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:41,127 INFO L225 Difference]: With dead ends: 73 [2022-03-19 23:24:41,127 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 23:24:41,127 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 23:24:41,128 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:41,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 85 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:41,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 23:24:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-19 23:24:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-19 23:24:41,132 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 51 [2022-03-19 23:24:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:41,132 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-19 23:24:41,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-19 23:24:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 23:24:41,132 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:41,132 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:41,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:41,333 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:41,333 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:41,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:41,333 INFO L85 PathProgramCache]: Analyzing trace with hash 863265463, now seen corresponding path program 9 times [2022-03-19 23:24:41,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:41,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599635117] [2022-03-19 23:24:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:41,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:41,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:41,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:41,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:24:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:41,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:41,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599635117] [2022-03-19 23:24:41,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599635117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:41,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034635676] [2022-03-19 23:24:41,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:24:41,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:41,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:41,554 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:41,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 23:24:41,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-19 23:24:41,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:41,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 23:24:41,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:41,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:42,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034635676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:42,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:42,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2022-03-19 23:24:42,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336473027] [2022-03-19 23:24:42,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:42,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:24:42,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:42,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:24:42,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:24:42,556 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:43,107 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-03-19 23:24:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 23:24:43,108 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-03-19 23:24:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:43,108 INFO L225 Difference]: With dead ends: 86 [2022-03-19 23:24:43,108 INFO L226 Difference]: Without dead ends: 75 [2022-03-19 23:24:43,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=937, Invalid=5225, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 23:24:43,110 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:43,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 87 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-19 23:24:43,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2022-03-19 23:24:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-03-19 23:24:43,115 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 53 [2022-03-19 23:24:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:43,115 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-03-19 23:24:43,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-03-19 23:24:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 23:24:43,116 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:43,116 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:43,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:43,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:43,331 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:43,332 INFO L85 PathProgramCache]: Analyzing trace with hash 205839347, now seen corresponding path program 9 times [2022-03-19 23:24:43,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:43,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201078473] [2022-03-19 23:24:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:43,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:43,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:43,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:43,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:24:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:43,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:43,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201078473] [2022-03-19 23:24:43,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201078473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:43,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132460257] [2022-03-19 23:24:43,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:24:43,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:43,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:43,553 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:43,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 23:24:43,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-19 23:24:43,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:43,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 23:24:43,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:43,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:44,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132460257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:44,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:44,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2022-03-19 23:24:44,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629233653] [2022-03-19 23:24:44,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:44,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 23:24:44,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:44,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 23:24:44,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 23:24:44,518 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:45,087 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-03-19 23:24:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 23:24:45,087 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-03-19 23:24:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:45,088 INFO L225 Difference]: With dead ends: 81 [2022-03-19 23:24:45,088 INFO L226 Difference]: Without dead ends: 72 [2022-03-19 23:24:45,089 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=937, Invalid=5225, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 23:24:45,089 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:45,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 95 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-19 23:24:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-03-19 23:24:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-03-19 23:24:45,093 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 53 [2022-03-19 23:24:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:45,093 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-03-19 23:24:45,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-03-19 23:24:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 23:24:45,094 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:45,094 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:45,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:45,306 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,SelfDestructingSolverStorable24 [2022-03-19 23:24:45,306 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:45,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:45,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1484104203, now seen corresponding path program 10 times [2022-03-19 23:24:45,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:45,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486423270] [2022-03-19 23:24:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:45,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:45,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:45,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:45,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 23:24:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:45,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:45,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486423270] [2022-03-19 23:24:45,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486423270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:45,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567447437] [2022-03-19 23:24:45,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:24:45,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:45,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:45,542 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:45,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 23:24:45,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:24:45,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:45,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 23:24:45,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:45,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:46,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567447437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:46,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:46,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2022-03-19 23:24:46,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935378233] [2022-03-19 23:24:46,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:46,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-19 23:24:46,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:46,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-19 23:24:46,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 23:24:46,488 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:46,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:46,983 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-03-19 23:24:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:24:46,984 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-19 23:24:46,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:46,984 INFO L225 Difference]: With dead ends: 83 [2022-03-19 23:24:46,984 INFO L226 Difference]: Without dead ends: 71 [2022-03-19 23:24:46,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=913, Invalid=4787, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 23:24:46,985 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:46,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 87 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-19 23:24:46,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-03-19 23:24:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 57 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:46,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-03-19 23:24:46,990 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 55 [2022-03-19 23:24:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:46,990 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-03-19 23:24:46,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-03-19 23:24:46,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 23:24:46,990 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:46,990 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:47,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 23:24:47,195 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,SelfDestructingSolverStorable25 [2022-03-19 23:24:47,195 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:47,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1172735403, now seen corresponding path program 10 times [2022-03-19 23:24:47,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:47,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173238941] [2022-03-19 23:24:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:47,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:47,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:47,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:47,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:24:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:47,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:47,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173238941] [2022-03-19 23:24:47,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173238941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:47,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659456542] [2022-03-19 23:24:47,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:24:47,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:47,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:47,456 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:47,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 23:24:47,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:24:47,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:47,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 23:24:47,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:47,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:48,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659456542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:48,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:48,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2022-03-19 23:24:48,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425844769] [2022-03-19 23:24:48,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:48,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-19 23:24:48,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:48,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-19 23:24:48,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 23:24:48,319 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:48,798 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-03-19 23:24:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:24:48,798 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-03-19 23:24:48,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:48,799 INFO L225 Difference]: With dead ends: 77 [2022-03-19 23:24:48,799 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 23:24:48,800 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=913, Invalid=4787, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 23:24:48,800 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 107 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:48,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 95 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 23:24:48,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-03-19 23:24:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 56 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-03-19 23:24:48,804 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 55 [2022-03-19 23:24:48,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:48,804 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-03-19 23:24:48,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:48,804 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-03-19 23:24:48,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 23:24:48,805 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:48,805 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:48,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:49,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 23:24:49,019 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:49,020 INFO L85 PathProgramCache]: Analyzing trace with hash 829449303, now seen corresponding path program 11 times [2022-03-19 23:24:49,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:49,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345685670] [2022-03-19 23:24:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:49,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:49,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:49,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:49,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:24:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:49,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:49,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345685670] [2022-03-19 23:24:49,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345685670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:49,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140119797] [2022-03-19 23:24:49,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:24:49,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:49,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:49,260 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:49,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 23:24:49,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-19 23:24:49,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:49,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 23:24:49,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:49,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:50,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140119797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:50,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:50,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2022-03-19 23:24:50,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594205608] [2022-03-19 23:24:50,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:50,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-19 23:24:50,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-19 23:24:50,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 23:24:50,338 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:50,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:50,990 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-03-19 23:24:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 23:24:50,991 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-03-19 23:24:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:50,991 INFO L225 Difference]: With dead ends: 90 [2022-03-19 23:24:50,991 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 23:24:50,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1133, Invalid=6349, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 23:24:50,992 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 173 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:50,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 82 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 23:24:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-03-19 23:24:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:50,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-03-19 23:24:50,997 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 57 [2022-03-19 23:24:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:50,997 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-03-19 23:24:50,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-03-19 23:24:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 23:24:50,997 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:50,997 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:51,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-19 23:24:51,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:51,203 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash 424150547, now seen corresponding path program 11 times [2022-03-19 23:24:51,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:51,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685038962] [2022-03-19 23:24:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:51,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:51,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:51,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:51,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:24:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:51,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:51,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685038962] [2022-03-19 23:24:51,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685038962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:51,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159881573] [2022-03-19 23:24:51,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:24:51,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:51,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:51,461 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:51,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 23:24:51,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-19 23:24:51,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:51,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 23:24:51,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:51,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:52,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159881573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:52,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:52,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2022-03-19 23:24:52,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469863859] [2022-03-19 23:24:52,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:52,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-19 23:24:52,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:52,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-19 23:24:52,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 23:24:52,499 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:53,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:53,097 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2022-03-19 23:24:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 23:24:53,097 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-03-19 23:24:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:53,098 INFO L225 Difference]: With dead ends: 85 [2022-03-19 23:24:53,098 INFO L226 Difference]: Without dead ends: 76 [2022-03-19 23:24:53,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1133, Invalid=6349, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 23:24:53,099 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:53,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 90 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-19 23:24:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-03-19 23:24:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.1) internal successors, (66), 62 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:53,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-03-19 23:24:53,103 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 57 [2022-03-19 23:24:53,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:53,103 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-03-19 23:24:53,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 62 states have internal predecessors, (122), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:53,104 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-03-19 23:24:53,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 23:24:53,104 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:53,104 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:53,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-19 23:24:53,304 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,SelfDestructingSolverStorable28 [2022-03-19 23:24:53,304 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:53,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:53,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2140438507, now seen corresponding path program 12 times [2022-03-19 23:24:53,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:53,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883961477] [2022-03-19 23:24:53,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:53,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:53,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:53,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:53,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 23:24:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:53,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:53,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883961477] [2022-03-19 23:24:53,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883961477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:53,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291080780] [2022-03-19 23:24:53,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:24:53,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:53,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:53,533 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:53,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 23:24:53,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 23:24:53,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:53,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 23:24:53,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:53,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:54,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291080780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:54,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:54,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2022-03-19 23:24:54,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312375669] [2022-03-19 23:24:54,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:54,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-19 23:24:54,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-19 23:24:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 23:24:54,657 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:55,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:55,205 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2022-03-19 23:24:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 23:24:55,205 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-03-19 23:24:55,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:55,206 INFO L225 Difference]: With dead ends: 87 [2022-03-19 23:24:55,206 INFO L226 Difference]: Without dead ends: 75 [2022-03-19 23:24:55,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1111, Invalid=5861, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 23:24:55,207 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:55,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 77 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-19 23:24:55,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-03-19 23:24:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-03-19 23:24:55,211 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 59 [2022-03-19 23:24:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:55,212 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-03-19 23:24:55,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-03-19 23:24:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 23:24:55,212 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:55,212 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:55,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-19 23:24:55,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:55,421 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:55,421 INFO L85 PathProgramCache]: Analyzing trace with hash 711228661, now seen corresponding path program 12 times [2022-03-19 23:24:55,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:55,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132401495] [2022-03-19 23:24:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:55,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:55,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:55,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:55,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:24:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:55,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:55,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132401495] [2022-03-19 23:24:55,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132401495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:55,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151691777] [2022-03-19 23:24:55,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:24:55,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:55,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:55,675 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:55,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 23:24:55,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 23:24:55,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:55,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 23:24:55,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:56,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:56,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151691777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:56,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:56,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2022-03-19 23:24:56,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241912201] [2022-03-19 23:24:56,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:56,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-19 23:24:56,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-19 23:24:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 23:24:56,706 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:57,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:57,231 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2022-03-19 23:24:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 23:24:57,231 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-03-19 23:24:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:57,231 INFO L225 Difference]: With dead ends: 81 [2022-03-19 23:24:57,232 INFO L226 Difference]: Without dead ends: 71 [2022-03-19 23:24:57,232 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2872 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1111, Invalid=5861, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 23:24:57,233 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 122 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:57,233 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 85 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:57,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-19 23:24:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-03-19 23:24:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 60 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-03-19 23:24:57,239 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 59 [2022-03-19 23:24:57,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:57,239 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-03-19 23:24:57,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-03-19 23:24:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 23:24:57,240 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:57,240 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:57,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-19 23:24:57,453 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,SelfDestructingSolverStorable30 [2022-03-19 23:24:57,453 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:57,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:57,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1157284105, now seen corresponding path program 13 times [2022-03-19 23:24:57,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:57,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510358836] [2022-03-19 23:24:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:57,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:57,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:57,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:57,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:24:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:57,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:57,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510358836] [2022-03-19 23:24:57,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510358836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:57,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675689141] [2022-03-19 23:24:57,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:24:57,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:57,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:57,736 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:24:57,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 23:24:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 23:24:57,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:58,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:58,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675689141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:58,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:58,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2022-03-19 23:24:58,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204735284] [2022-03-19 23:24:58,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:58,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-19 23:24:58,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:58,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-19 23:24:58,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 23:24:58,980 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:59,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:59,658 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-03-19 23:24:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 23:24:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-03-19 23:24:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:59,659 INFO L225 Difference]: With dead ends: 94 [2022-03-19 23:24:59,659 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 23:24:59,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3671 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1349, Invalid=7581, Unknown=0, NotChecked=0, Total=8930 [2022-03-19 23:24:59,660 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 186 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:59,660 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 82 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:24:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 23:24:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2022-03-19 23:24:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:24:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-03-19 23:24:59,665 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 61 [2022-03-19 23:24:59,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:59,665 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-03-19 23:24:59,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:24:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-03-19 23:24:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 23:24:59,666 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:59,666 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:59,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-19 23:24:59,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:59,882 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:59,883 INFO L85 PathProgramCache]: Analyzing trace with hash 213641523, now seen corresponding path program 13 times [2022-03-19 23:24:59,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:59,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298224575] [2022-03-19 23:24:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:59,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:59,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:59,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:24:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:00,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:25:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:00,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:00,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298224575] [2022-03-19 23:25:00,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298224575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:00,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564048716] [2022-03-19 23:25:00,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:25:00,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:00,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:00,161 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:00,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 23:25:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:00,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 23:25:00,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:00,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:01,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564048716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:01,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:01,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2022-03-19 23:25:01,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097955656] [2022-03-19 23:25:01,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:01,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-19 23:25:01,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:01,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-19 23:25:01,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 23:25:01,311 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:01,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:01,989 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-03-19 23:25:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 23:25:02,003 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-03-19 23:25:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:02,004 INFO L225 Difference]: With dead ends: 89 [2022-03-19 23:25:02,004 INFO L226 Difference]: Without dead ends: 80 [2022-03-19 23:25:02,005 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3680 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1349, Invalid=7581, Unknown=0, NotChecked=0, Total=8930 [2022-03-19 23:25:02,005 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 140 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:02,005 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 75 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-19 23:25:02,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-03-19 23:25:02,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.09375) internal successors, (70), 66 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-03-19 23:25:02,010 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 61 [2022-03-19 23:25:02,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:02,010 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-03-19 23:25:02,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 68 states have internal predecessors, (134), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:02,010 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-03-19 23:25:02,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 23:25:02,011 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:02,011 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:02,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:02,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:02,229 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:02,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1718819637, now seen corresponding path program 14 times [2022-03-19 23:25:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:02,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310019537] [2022-03-19 23:25:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:02,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:02,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:02,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:02,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 23:25:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:02,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:02,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310019537] [2022-03-19 23:25:02,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310019537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:02,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229854807] [2022-03-19 23:25:02,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:25:02,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:02,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:02,508 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:02,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 23:25:02,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:25:02,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:02,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 23:25:02,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:02,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:03,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229854807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:03,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:03,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2022-03-19 23:25:03,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261807099] [2022-03-19 23:25:03,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:03,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-19 23:25:03,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-19 23:25:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 23:25:03,633 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:04,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:04,238 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-03-19 23:25:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 23:25:04,239 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-03-19 23:25:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:04,239 INFO L225 Difference]: With dead ends: 91 [2022-03-19 23:25:04,239 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 23:25:04,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3580 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1329, Invalid=7043, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 23:25:04,241 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:04,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 87 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 23:25:04,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2022-03-19 23:25:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-03-19 23:25:04,245 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 63 [2022-03-19 23:25:04,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:04,245 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-03-19 23:25:04,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-03-19 23:25:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 23:25:04,246 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:04,246 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:04,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:04,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:04,463 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:04,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:04,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1960827029, now seen corresponding path program 14 times [2022-03-19 23:25:04,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:04,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469137534] [2022-03-19 23:25:04,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:04,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:04,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:04,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:04,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:25:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:04,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:04,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469137534] [2022-03-19 23:25:04,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469137534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:04,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701874429] [2022-03-19 23:25:04,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:25:04,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:04,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:04,753 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:04,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 23:25:04,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:25:04,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:04,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 23:25:04,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:05,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:05,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701874429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:05,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:05,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2022-03-19 23:25:05,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528394610] [2022-03-19 23:25:05,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:05,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-19 23:25:05,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:05,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-19 23:25:05,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 23:25:05,889 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:06,408 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2022-03-19 23:25:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 23:25:06,408 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-03-19 23:25:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:06,409 INFO L225 Difference]: With dead ends: 85 [2022-03-19 23:25:06,409 INFO L226 Difference]: Without dead ends: 75 [2022-03-19 23:25:06,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3527 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1329, Invalid=7043, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 23:25:06,410 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:06,410 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 70 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-19 23:25:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-03-19 23:25:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-03-19 23:25:06,414 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 63 [2022-03-19 23:25:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:06,415 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-03-19 23:25:06,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-03-19 23:25:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 23:25:06,415 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:06,415 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:06,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:06,631 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,SelfDestructingSolverStorable34 [2022-03-19 23:25:06,631 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1410871959, now seen corresponding path program 15 times [2022-03-19 23:25:06,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:06,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839575395] [2022-03-19 23:25:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:06,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:06,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:06,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:06,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:25:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:06,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:06,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839575395] [2022-03-19 23:25:06,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839575395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:06,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035038676] [2022-03-19 23:25:06,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:25:06,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:06,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:06,917 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:06,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 23:25:06,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-19 23:25:06,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:06,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 23:25:06,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:07,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:08,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035038676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:08,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:08,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2022-03-19 23:25:08,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352361875] [2022-03-19 23:25:08,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:08,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-19 23:25:08,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:08,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-19 23:25:08,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 23:25:08,255 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:09,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:09,041 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-03-19 23:25:09,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 23:25:09,042 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-03-19 23:25:09,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:09,042 INFO L225 Difference]: With dead ends: 98 [2022-03-19 23:25:09,042 INFO L226 Difference]: Without dead ends: 87 [2022-03-19 23:25:09,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1585, Invalid=8921, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 23:25:09,044 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 193 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:09,045 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 77 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:25:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-19 23:25:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2022-03-19 23:25:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-03-19 23:25:09,053 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 65 [2022-03-19 23:25:09,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:09,053 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-03-19 23:25:09,053 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-03-19 23:25:09,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 23:25:09,053 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:09,053 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:09,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-19 23:25:09,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-19 23:25:09,254 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:09,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:09,254 INFO L85 PathProgramCache]: Analyzing trace with hash 336446803, now seen corresponding path program 15 times [2022-03-19 23:25:09,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:09,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649903239] [2022-03-19 23:25:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:09,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:09,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:09,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:09,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:25:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649903239] [2022-03-19 23:25:09,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649903239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995144793] [2022-03-19 23:25:09,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:25:09,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:09,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:09,574 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:09,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 23:25:09,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-19 23:25:09,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:09,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 23:25:09,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:10,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:10,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995144793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:10,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:10,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2022-03-19 23:25:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072991663] [2022-03-19 23:25:10,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:10,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-19 23:25:10,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-19 23:25:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 23:25:10,924 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:11,610 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-03-19 23:25:11,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 23:25:11,610 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-03-19 23:25:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:11,611 INFO L225 Difference]: With dead ends: 93 [2022-03-19 23:25:11,611 INFO L226 Difference]: Without dead ends: 84 [2022-03-19 23:25:11,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1585, Invalid=8921, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 23:25:11,612 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:11,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 75 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-19 23:25:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-03-19 23:25:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.088235294117647) internal successors, (74), 70 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-03-19 23:25:11,619 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 65 [2022-03-19 23:25:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:11,619 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-03-19 23:25:11,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-03-19 23:25:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:25:11,620 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:11,620 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:11,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-19 23:25:11,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:11,820 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:11,821 INFO L85 PathProgramCache]: Analyzing trace with hash -524390571, now seen corresponding path program 16 times [2022-03-19 23:25:11,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:11,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576046374] [2022-03-19 23:25:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:11,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:11,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:11,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:11,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 23:25:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:12,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:12,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576046374] [2022-03-19 23:25:12,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576046374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:12,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701147799] [2022-03-19 23:25:12,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:25:12,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:12,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:12,097 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:12,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 23:25:12,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:25:12,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:12,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 23:25:12,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:12,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:13,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701147799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:13,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:13,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2022-03-19 23:25:13,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541142408] [2022-03-19 23:25:13,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:13,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-19 23:25:13,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:13,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-19 23:25:13,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 23:25:13,399 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:14,130 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2022-03-19 23:25:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 23:25:14,131 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-03-19 23:25:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:14,131 INFO L225 Difference]: With dead ends: 95 [2022-03-19 23:25:14,131 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 23:25:14,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4308 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1567, Invalid=8333, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 23:25:14,132 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 111 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:14,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 117 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:25:14,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 23:25:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2022-03-19 23:25:14,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 69 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-03-19 23:25:14,139 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 67 [2022-03-19 23:25:14,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:14,139 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-03-19 23:25:14,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:14,139 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-03-19 23:25:14,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:25:14,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:14,140 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:14,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 23:25:14,347 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,SelfDestructingSolverStorable37 [2022-03-19 23:25:14,347 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash 95472949, now seen corresponding path program 16 times [2022-03-19 23:25:14,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:14,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334693644] [2022-03-19 23:25:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:14,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:14,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:14,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:14,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:25:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:14,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:14,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334693644] [2022-03-19 23:25:14,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334693644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:14,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094777165] [2022-03-19 23:25:14,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:25:14,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:14,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:14,656 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:14,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 23:25:14,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:25:14,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:14,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 23:25:14,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:15,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:15,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094777165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:15,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:15,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2022-03-19 23:25:15,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501133421] [2022-03-19 23:25:15,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:15,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-19 23:25:15,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:15,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-19 23:25:15,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 23:25:15,857 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:16,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:16,496 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-03-19 23:25:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 23:25:16,497 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-03-19 23:25:16,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:16,497 INFO L225 Difference]: With dead ends: 89 [2022-03-19 23:25:16,497 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 23:25:16,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1567, Invalid=8333, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 23:25:16,498 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:16,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 95 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 23:25:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-19 23:25:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 68 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-03-19 23:25:16,504 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 67 [2022-03-19 23:25:16,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:16,504 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-03-19 23:25:16,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-03-19 23:25:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:25:16,504 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:16,504 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:16,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:16,719 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,SelfDestructingSolverStorable38 [2022-03-19 23:25:16,720 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:16,720 INFO L85 PathProgramCache]: Analyzing trace with hash -193036489, now seen corresponding path program 17 times [2022-03-19 23:25:16,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:16,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511868936] [2022-03-19 23:25:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:16,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:16,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:16,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:16,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:25:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:17,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:17,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511868936] [2022-03-19 23:25:17,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511868936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:17,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306008091] [2022-03-19 23:25:17,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:25:17,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:17,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:17,039 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:17,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 23:25:17,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-19 23:25:17,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 23:25:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:17,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:18,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306008091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:18,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:18,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2022-03-19 23:25:18,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031222879] [2022-03-19 23:25:18,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:18,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-19 23:25:18,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:18,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-19 23:25:18,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 23:25:18,497 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:19,316 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-03-19 23:25:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 23:25:19,317 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-03-19 23:25:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:19,317 INFO L225 Difference]: With dead ends: 102 [2022-03-19 23:25:19,317 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 23:25:19,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5214 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1841, Invalid=10369, Unknown=0, NotChecked=0, Total=12210 [2022-03-19 23:25:19,319 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:19,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 77 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 23:25:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2022-03-19 23:25:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 71 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-03-19 23:25:19,324 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 69 [2022-03-19 23:25:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:19,324 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-03-19 23:25:19,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-03-19 23:25:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 23:25:19,325 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:19,325 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:19,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-19 23:25:19,535 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,SelfDestructingSolverStorable39 [2022-03-19 23:25:19,535 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1902454157, now seen corresponding path program 17 times [2022-03-19 23:25:19,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:19,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644637511] [2022-03-19 23:25:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:19,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:19,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:19,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:19,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:25:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:19,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:19,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644637511] [2022-03-19 23:25:19,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644637511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:19,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060620185] [2022-03-19 23:25:19,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:25:19,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:19,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:19,883 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:19,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 23:25:19,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-19 23:25:19,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:19,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 23:25:19,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:20,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:21,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060620185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:21,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:21,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2022-03-19 23:25:21,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397141320] [2022-03-19 23:25:21,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:21,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-19 23:25:21,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-19 23:25:21,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 23:25:21,351 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:22,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:22,170 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2022-03-19 23:25:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 23:25:22,170 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-03-19 23:25:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:22,171 INFO L225 Difference]: With dead ends: 97 [2022-03-19 23:25:22,171 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 23:25:22,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1841, Invalid=10369, Unknown=0, NotChecked=0, Total=12210 [2022-03-19 23:25:22,172 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:22,172 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 85 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 23:25:22,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-03-19 23:25:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 74 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-03-19 23:25:22,178 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 69 [2022-03-19 23:25:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:22,178 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-03-19 23:25:22,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-03-19 23:25:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:25:22,179 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:22,179 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:22,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:22,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:22,398 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:22,398 INFO L85 PathProgramCache]: Analyzing trace with hash -329597835, now seen corresponding path program 18 times [2022-03-19 23:25:22,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:22,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973148551] [2022-03-19 23:25:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:22,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:22,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:22,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:22,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 23:25:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:22,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:22,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973148551] [2022-03-19 23:25:22,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973148551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:22,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014665782] [2022-03-19 23:25:22,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:25:22,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:22,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:22,709 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:22,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 23:25:22,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 23:25:22,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:22,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 23:25:22,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:23,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:24,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014665782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:24,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:24,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2022-03-19 23:25:24,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252012946] [2022-03-19 23:25:24,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:24,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-19 23:25:24,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:24,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-19 23:25:24,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 23:25:24,188 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:24,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:24,869 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-03-19 23:25:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 23:25:24,869 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-03-19 23:25:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:24,870 INFO L225 Difference]: With dead ends: 99 [2022-03-19 23:25:24,870 INFO L226 Difference]: Without dead ends: 87 [2022-03-19 23:25:24,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1825, Invalid=9731, Unknown=0, NotChecked=0, Total=11556 [2022-03-19 23:25:24,872 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 147 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:24,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 82 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-19 23:25:24,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2022-03-19 23:25:24,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 73 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-03-19 23:25:24,880 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 71 [2022-03-19 23:25:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:24,880 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-03-19 23:25:24,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-03-19 23:25:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 23:25:24,881 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:24,881 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:24,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-19 23:25:25,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:25,091 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:25,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1662215467, now seen corresponding path program 18 times [2022-03-19 23:25:25,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:25,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871865581] [2022-03-19 23:25:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:25,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:25,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:25,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:25,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 23:25:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:25,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:25,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871865581] [2022-03-19 23:25:25,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871865581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:25,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65436699] [2022-03-19 23:25:25,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:25:25,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:25,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:25,467 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:25,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 23:25:25,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 23:25:25,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 23:25:25,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:26,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:26,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65436699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:26,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:26,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2022-03-19 23:25:26,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039163825] [2022-03-19 23:25:26,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:26,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-19 23:25:26,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:26,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-19 23:25:26,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 23:25:26,792 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:27,474 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2022-03-19 23:25:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 23:25:27,475 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-03-19 23:25:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:27,475 INFO L225 Difference]: With dead ends: 93 [2022-03-19 23:25:27,475 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 23:25:27,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5038 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1825, Invalid=9731, Unknown=0, NotChecked=0, Total=11556 [2022-03-19 23:25:27,477 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 120 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:27,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 90 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 23:25:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-03-19 23:25:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 72 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-03-19 23:25:27,483 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 71 [2022-03-19 23:25:27,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:27,483 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-03-19 23:25:27,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-03-19 23:25:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 23:25:27,483 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:27,483 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:27,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-19 23:25:27,687 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,SelfDestructingSolverStorable42 [2022-03-19 23:25:27,687 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:27,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:27,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1409456937, now seen corresponding path program 19 times [2022-03-19 23:25:27,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:27,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810570447] [2022-03-19 23:25:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:27,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:27,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:27,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:27,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 23:25:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:28,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:28,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810570447] [2022-03-19 23:25:28,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810570447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:28,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288883652] [2022-03-19 23:25:28,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:25:28,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:28,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:28,067 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:28,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 23:25:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:28,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 23:25:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:28,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:29,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288883652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:29,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:29,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2022-03-19 23:25:29,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486800961] [2022-03-19 23:25:29,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:29,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-19 23:25:29,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:29,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-19 23:25:29,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 23:25:29,660 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:30,624 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-03-19 23:25:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:25:30,624 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-03-19 23:25:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:30,625 INFO L225 Difference]: With dead ends: 106 [2022-03-19 23:25:30,625 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 23:25:30,626 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6086 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2117, Invalid=11925, Unknown=0, NotChecked=0, Total=14042 [2022-03-19 23:25:30,626 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:30,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 132 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:25:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 23:25:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-03-19 23:25:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 75 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:30,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-03-19 23:25:30,632 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 73 [2022-03-19 23:25:30,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:30,633 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-03-19 23:25:30,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-03-19 23:25:30,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 23:25:30,633 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:30,633 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:30,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-19 23:25:30,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-19 23:25:30,834 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:30,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:30,834 INFO L85 PathProgramCache]: Analyzing trace with hash 833644691, now seen corresponding path program 19 times [2022-03-19 23:25:30,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:30,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677424693] [2022-03-19 23:25:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:30,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:30,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:30,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:30,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 23:25:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:31,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:31,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677424693] [2022-03-19 23:25:31,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677424693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:31,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181381735] [2022-03-19 23:25:31,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:25:31,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:31,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:31,205 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:31,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 23:25:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:31,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 23:25:31,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:31,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:32,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181381735] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:32,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:32,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2022-03-19 23:25:32,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624162925] [2022-03-19 23:25:32,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:32,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-19 23:25:32,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:32,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-19 23:25:32,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 23:25:32,764 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:33,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:33,617 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2022-03-19 23:25:33,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:25:33,618 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-03-19 23:25:33,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:33,618 INFO L225 Difference]: With dead ends: 101 [2022-03-19 23:25:33,618 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 23:25:33,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6098 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2117, Invalid=11925, Unknown=0, NotChecked=0, Total=14042 [2022-03-19 23:25:33,620 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:33,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 95 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:25:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 23:25:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-03-19 23:25:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 78 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:33,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-03-19 23:25:33,626 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 73 [2022-03-19 23:25:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:33,626 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-03-19 23:25:33,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9540229885057472) internal successors, (170), 86 states have internal predecessors, (170), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-03-19 23:25:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 23:25:33,627 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:33,627 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:33,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:33,839 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,SelfDestructingSolverStorable44 [2022-03-19 23:25:33,839 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:33,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 541409941, now seen corresponding path program 20 times [2022-03-19 23:25:33,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:33,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922391165] [2022-03-19 23:25:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:33,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:33,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:33,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:34,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 23:25:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:34,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:34,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922391165] [2022-03-19 23:25:34,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922391165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:34,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142334689] [2022-03-19 23:25:34,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:25:34,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:34,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:34,208 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:25:34,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 23:25:34,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:25:34,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:34,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 23:25:34,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:34,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:35,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142334689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:35,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:35,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2022-03-19 23:25:35,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792281976] [2022-03-19 23:25:35,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:35,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-19 23:25:35,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:35,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-19 23:25:35,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 23:25:35,739 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:36,561 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2022-03-19 23:25:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 23:25:36,561 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2022-03-19 23:25:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:36,562 INFO L225 Difference]: With dead ends: 103 [2022-03-19 23:25:36,562 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 23:25:36,563 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5965 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2103, Invalid=11237, Unknown=0, NotChecked=0, Total=13340 [2022-03-19 23:25:36,563 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:36,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 117 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:25:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 23:25:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2022-03-19 23:25:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 77 states have internal predecessors, (80), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-03-19 23:25:36,570 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 75 [2022-03-19 23:25:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:36,570 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-03-19 23:25:36,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-03-19 23:25:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 23:25:36,570 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:36,571 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:36,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:36,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-19 23:25:36,771 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:36,771 INFO L85 PathProgramCache]: Analyzing trace with hash -224886411, now seen corresponding path program 20 times [2022-03-19 23:25:36,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:36,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502173288] [2022-03-19 23:25:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:36,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:36,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:36,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:36,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 23:25:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:37,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:37,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502173288] [2022-03-19 23:25:37,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502173288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:37,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032041386] [2022-03-19 23:25:37,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:25:37,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:37,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:37,151 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) [2022-03-19 23:25:37,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 23:25:37,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:25:37,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:37,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 23:25:37,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:37,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:38,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032041386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:38,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:38,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2022-03-19 23:25:38,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977702099] [2022-03-19 23:25:38,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:38,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-19 23:25:38,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:38,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-19 23:25:38,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 23:25:38,678 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:39,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:39,483 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2022-03-19 23:25:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 23:25:39,483 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2022-03-19 23:25:39,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:39,484 INFO L225 Difference]: With dead ends: 97 [2022-03-19 23:25:39,484 INFO L226 Difference]: Without dead ends: 87 [2022-03-19 23:25:39,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5894 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2103, Invalid=11237, Unknown=0, NotChecked=0, Total=13340 [2022-03-19 23:25:39,485 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 141 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:39,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 95 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:25:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-19 23:25:39,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-03-19 23:25:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.054054054054054) internal successors, (78), 76 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-03-19 23:25:39,491 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 75 [2022-03-19 23:25:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:39,491 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-03-19 23:25:39,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-03-19 23:25:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 23:25:39,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:39,492 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:39,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:39,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:39,708 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:39,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:39,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1179263863, now seen corresponding path program 21 times [2022-03-19 23:25:39,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:39,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109269652] [2022-03-19 23:25:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:39,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:39,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:39,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:39,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 23:25:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:40,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:40,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109269652] [2022-03-19 23:25:40,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109269652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:40,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280298291] [2022-03-19 23:25:40,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:25:40,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:40,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:40,061 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) [2022-03-19 23:25:40,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 23:25:40,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-19 23:25:40,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:40,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 23:25:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:40,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:41,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280298291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:41,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:41,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2022-03-19 23:25:41,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790834687] [2022-03-19 23:25:41,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:41,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-19 23:25:41,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:41,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-19 23:25:41,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2022-03-19 23:25:41,803 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:42,758 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-03-19 23:25:42,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 23:25:42,758 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-03-19 23:25:42,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:42,758 INFO L225 Difference]: With dead ends: 110 [2022-03-19 23:25:42,759 INFO L226 Difference]: Without dead ends: 99 [2022-03-19 23:25:42,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7025 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2413, Invalid=13589, Unknown=0, NotChecked=0, Total=16002 [2022-03-19 23:25:42,760 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 211 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:42,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 87 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:25:42,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-19 23:25:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2022-03-19 23:25:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-03-19 23:25:42,767 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 77 [2022-03-19 23:25:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:42,767 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-03-19 23:25:42,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:42,767 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-03-19 23:25:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 23:25:42,768 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:42,768 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:42,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-19 23:25:42,968 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,SelfDestructingSolverStorable47 [2022-03-19 23:25:42,968 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:42,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash 747351987, now seen corresponding path program 21 times [2022-03-19 23:25:42,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:42,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832966760] [2022-03-19 23:25:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:42,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:42,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:42,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:43,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 23:25:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:43,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:43,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832966760] [2022-03-19 23:25:43,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832966760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:43,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421719871] [2022-03-19 23:25:43,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:25:43,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:43,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:43,371 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) [2022-03-19 23:25:43,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 23:25:43,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-19 23:25:43,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 23:25:43,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:44,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:45,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421719871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:45,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:45,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2022-03-19 23:25:45,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124512564] [2022-03-19 23:25:45,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:45,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-19 23:25:45,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:45,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-19 23:25:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2022-03-19 23:25:45,041 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:45,933 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2022-03-19 23:25:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 23:25:45,933 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-03-19 23:25:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:45,934 INFO L225 Difference]: With dead ends: 105 [2022-03-19 23:25:45,934 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 23:25:45,935 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7038 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2413, Invalid=13589, Unknown=0, NotChecked=0, Total=16002 [2022-03-19 23:25:45,936 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:45,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 95 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:25:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 23:25:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-03-19 23:25:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.075) internal successors, (86), 82 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2022-03-19 23:25:45,942 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 77 [2022-03-19 23:25:45,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:45,943 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2022-03-19 23:25:45,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.956989247311828) internal successors, (182), 92 states have internal predecessors, (182), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:45,943 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2022-03-19 23:25:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 23:25:45,943 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:45,943 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:45,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:46,159 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,SelfDestructingSolverStorable48 [2022-03-19 23:25:46,159 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:46,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:46,160 INFO L85 PathProgramCache]: Analyzing trace with hash -781499979, now seen corresponding path program 22 times [2022-03-19 23:25:46,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:46,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656026024] [2022-03-19 23:25:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:46,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:46,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:46,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:46,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 23:25:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:46,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:46,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656026024] [2022-03-19 23:25:46,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656026024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:46,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490020733] [2022-03-19 23:25:46,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:25:46,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:46,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:46,648 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) [2022-03-19 23:25:46,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 23:25:46,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:25:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:46,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 23:25:46,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:47,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:48,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490020733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:48,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:48,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2022-03-19 23:25:48,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766529277] [2022-03-19 23:25:48,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:48,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-19 23:25:48,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:48,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-19 23:25:48,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 23:25:48,508 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:49,430 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2022-03-19 23:25:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:25:49,430 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 79 [2022-03-19 23:25:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:49,431 INFO L225 Difference]: With dead ends: 107 [2022-03-19 23:25:49,431 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 23:25:49,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6894 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2401, Invalid=12851, Unknown=0, NotChecked=0, Total=15252 [2022-03-19 23:25:49,432 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 164 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:49,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 92 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:25:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 23:25:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-03-19 23:25:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 81 states have internal predecessors, (84), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-03-19 23:25:49,442 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 79 [2022-03-19 23:25:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:49,442 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-03-19 23:25:49,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-03-19 23:25:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 23:25:49,443 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:49,443 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:49,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:49,667 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,SelfDestructingSolverStorable49 [2022-03-19 23:25:49,668 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:49,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1521074453, now seen corresponding path program 22 times [2022-03-19 23:25:49,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:49,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966674364] [2022-03-19 23:25:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:49,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:49,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:49,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:49,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 23:25:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:50,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:50,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966674364] [2022-03-19 23:25:50,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966674364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:50,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99785910] [2022-03-19 23:25:50,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:25:50,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:50,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:50,129 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) [2022-03-19 23:25:50,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 23:25:50,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:25:50,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 23:25:50,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:50,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:51,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99785910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:51,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:51,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2022-03-19 23:25:51,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736979156] [2022-03-19 23:25:51,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:51,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-19 23:25:51,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:51,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-19 23:25:51,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 23:25:51,782 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:52,594 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-03-19 23:25:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:25:52,594 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 79 [2022-03-19 23:25:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:52,594 INFO L225 Difference]: With dead ends: 101 [2022-03-19 23:25:52,594 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 23:25:52,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6817 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2401, Invalid=12851, Unknown=0, NotChecked=0, Total=15252 [2022-03-19 23:25:52,596 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 193 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:52,596 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 95 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:25:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 23:25:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-03-19 23:25:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 80 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-03-19 23:25:52,605 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 79 [2022-03-19 23:25:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:52,605 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-03-19 23:25:52,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-03-19 23:25:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 23:25:52,606 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:52,606 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:52,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:52,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:52,815 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash -284558569, now seen corresponding path program 23 times [2022-03-19 23:25:52,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:52,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033315954] [2022-03-19 23:25:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:52,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:52,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:52,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:53,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 23:25:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:53,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:53,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033315954] [2022-03-19 23:25:53,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033315954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:53,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967785942] [2022-03-19 23:25:53,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:25:53,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:53,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:53,212 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) [2022-03-19 23:25:53,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 23:25:53,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-19 23:25:53,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:53,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 23:25:53,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:54,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:55,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967785942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:55,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:55,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2022-03-19 23:25:55,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717518569] [2022-03-19 23:25:55,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:55,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-19 23:25:55,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:55,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-19 23:25:55,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 23:25:55,115 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:56,112 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2022-03-19 23:25:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 23:25:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 81 [2022-03-19 23:25:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:56,113 INFO L225 Difference]: With dead ends: 114 [2022-03-19 23:25:56,113 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 23:25:56,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8031 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2729, Invalid=15361, Unknown=0, NotChecked=0, Total=18090 [2022-03-19 23:25:56,115 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 168 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:56,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 102 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:25:56,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 23:25:56,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2022-03-19 23:25:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:56,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-03-19 23:25:56,122 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 81 [2022-03-19 23:25:56,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:56,122 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-03-19 23:25:56,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-03-19 23:25:56,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 23:25:56,123 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:56,123 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:56,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-19 23:25:56,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:56,323 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:56,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:56,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1280962515, now seen corresponding path program 23 times [2022-03-19 23:25:56,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:56,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796463043] [2022-03-19 23:25:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:56,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:56,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:56,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:56,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 23:25:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:56,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796463043] [2022-03-19 23:25:56,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796463043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004464503] [2022-03-19 23:25:56,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:25:56,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:56,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:56,803 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) [2022-03-19 23:25:56,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 23:25:56,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-19 23:25:56,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:56,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 23:25:56,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:57,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:58,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004464503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:58,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:58,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2022-03-19 23:25:58,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576197041] [2022-03-19 23:25:58,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:58,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-19 23:25:58,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-19 23:25:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 23:25:58,729 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:59,646 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2022-03-19 23:25:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 23:25:59,647 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 81 [2022-03-19 23:25:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:59,647 INFO L225 Difference]: With dead ends: 109 [2022-03-19 23:25:59,647 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 23:25:59,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8045 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2729, Invalid=15361, Unknown=0, NotChecked=0, Total=18090 [2022-03-19 23:25:59,649 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 223 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:59,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 65 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 23:25:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-03-19 23:25:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 86 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:25:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2022-03-19 23:25:59,656 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 81 [2022-03-19 23:25:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:59,657 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2022-03-19 23:25:59,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9595959595959596) internal successors, (194), 98 states have internal predecessors, (194), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:25:59,657 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2022-03-19 23:25:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 23:25:59,657 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:59,657 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:59,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:59,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:59,874 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:59,874 INFO L85 PathProgramCache]: Analyzing trace with hash 917109205, now seen corresponding path program 24 times [2022-03-19 23:25:59,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:59,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20233482] [2022-03-19 23:25:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:59,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:59,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:59,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:25:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:00,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 23:26:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:00,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:00,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20233482] [2022-03-19 23:26:00,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20233482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:00,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633014086] [2022-03-19 23:26:00,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:26:00,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:00,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:00,269 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) [2022-03-19 23:26:00,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 23:26:00,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-03-19 23:26:00,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:00,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 23:26:00,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:01,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:02,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633014086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:02,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:02,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2022-03-19 23:26:02,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384482503] [2022-03-19 23:26:02,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:02,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-19 23:26:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:02,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-19 23:26:02,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 23:26:02,076 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:02,946 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2022-03-19 23:26:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 23:26:02,946 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 83 [2022-03-19 23:26:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:02,947 INFO L225 Difference]: With dead ends: 111 [2022-03-19 23:26:02,947 INFO L226 Difference]: Without dead ends: 99 [2022-03-19 23:26:02,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7890 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2719, Invalid=14573, Unknown=0, NotChecked=0, Total=17292 [2022-03-19 23:26:02,949 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 160 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:02,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 72 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:26:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-19 23:26:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-03-19 23:26:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 85 states have internal predecessors, (88), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2022-03-19 23:26:02,956 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 83 [2022-03-19 23:26:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:02,956 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2022-03-19 23:26:02,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:02,957 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2022-03-19 23:26:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 23:26:02,957 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:02,957 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:02,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-19 23:26:03,157 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-19 23:26:03,158 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:03,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:03,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1761974709, now seen corresponding path program 24 times [2022-03-19 23:26:03,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:03,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264464370] [2022-03-19 23:26:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:03,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:03,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:03,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:03,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 23:26:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:03,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:03,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264464370] [2022-03-19 23:26:03,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264464370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:03,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076264896] [2022-03-19 23:26:03,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:26:03,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:03,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:03,608 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) [2022-03-19 23:26:03,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 23:26:03,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-03-19 23:26:03,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:03,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 23:26:03,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:04,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:05,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076264896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:05,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:05,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2022-03-19 23:26:05,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853799948] [2022-03-19 23:26:05,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:05,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-19 23:26:05,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:05,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-19 23:26:05,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 23:26:05,414 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:06,320 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2022-03-19 23:26:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 23:26:06,321 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 83 [2022-03-19 23:26:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:06,321 INFO L225 Difference]: With dead ends: 105 [2022-03-19 23:26:06,321 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 23:26:06,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7807 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2719, Invalid=14573, Unknown=0, NotChecked=0, Total=17292 [2022-03-19 23:26:06,322 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:06,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 100 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:26:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 23:26:06,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-19 23:26:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.048780487804878) internal successors, (86), 84 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-03-19 23:26:06,330 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 83 [2022-03-19 23:26:06,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:06,330 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-03-19 23:26:06,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:06,330 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-03-19 23:26:06,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 23:26:06,331 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:06,331 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:06,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:06,539 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,SelfDestructingSolverStorable54 [2022-03-19 23:26:06,539 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash -707646537, now seen corresponding path program 25 times [2022-03-19 23:26:06,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:06,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931021390] [2022-03-19 23:26:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:06,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:06,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:06,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:06,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 23:26:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:07,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:07,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931021390] [2022-03-19 23:26:07,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931021390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:07,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058656909] [2022-03-19 23:26:07,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:26:07,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:07,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:07,006 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) [2022-03-19 23:26:07,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 23:26:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:07,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 23:26:07,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:07,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:09,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058656909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:09,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:09,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2022-03-19 23:26:09,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488117294] [2022-03-19 23:26:09,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:09,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-19 23:26:09,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:09,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-19 23:26:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2022-03-19 23:26:09,072 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:10,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:10,185 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-03-19 23:26:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 23:26:10,186 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2022-03-19 23:26:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:10,186 INFO L225 Difference]: With dead ends: 118 [2022-03-19 23:26:10,186 INFO L226 Difference]: Without dead ends: 107 [2022-03-19 23:26:10,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9104 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3065, Invalid=17241, Unknown=0, NotChecked=0, Total=20306 [2022-03-19 23:26:10,187 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 195 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:10,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 92 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:26:10,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-19 23:26:10,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2022-03-19 23:26:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 87 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-03-19 23:26:10,195 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 85 [2022-03-19 23:26:10,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:10,195 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-03-19 23:26:10,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:10,195 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-03-19 23:26:10,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 23:26:10,196 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:10,196 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:10,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:10,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-19 23:26:10,403 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash 540567795, now seen corresponding path program 25 times [2022-03-19 23:26:10,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:10,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917300904] [2022-03-19 23:26:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:10,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:10,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:10,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:10,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 23:26:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:10,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:10,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917300904] [2022-03-19 23:26:10,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917300904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:10,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221066522] [2022-03-19 23:26:10,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:26:10,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:10,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:10,915 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) [2022-03-19 23:26:10,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 23:26:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:11,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 23:26:11,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:11,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:12,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221066522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:12,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:12,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2022-03-19 23:26:12,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753160397] [2022-03-19 23:26:12,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:12,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-19 23:26:12,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:12,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-19 23:26:12,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2022-03-19 23:26:12,884 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:13,942 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2022-03-19 23:26:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 23:26:13,942 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2022-03-19 23:26:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:13,943 INFO L225 Difference]: With dead ends: 113 [2022-03-19 23:26:13,943 INFO L226 Difference]: Without dead ends: 104 [2022-03-19 23:26:13,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9119 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3065, Invalid=17241, Unknown=0, NotChecked=0, Total=20306 [2022-03-19 23:26:13,945 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 191 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:13,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 85 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:26:13,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-19 23:26:13,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-03-19 23:26:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 90 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2022-03-19 23:26:13,954 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 85 [2022-03-19 23:26:13,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:13,954 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2022-03-19 23:26:13,955 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 104 states have internal predecessors, (206), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:13,955 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2022-03-19 23:26:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 23:26:13,955 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:13,955 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:13,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:14,167 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,SelfDestructingSolverStorable56 [2022-03-19 23:26:14,167 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:14,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:14,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1932612875, now seen corresponding path program 26 times [2022-03-19 23:26:14,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:14,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957135376] [2022-03-19 23:26:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:14,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:14,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:14,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:14,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 23:26:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:14,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:14,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957135376] [2022-03-19 23:26:14,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957135376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:14,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980863372] [2022-03-19 23:26:14,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:26:14,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:14,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:14,566 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) [2022-03-19 23:26:14,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 23:26:14,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:26:14,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:14,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 23:26:14,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:15,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:16,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980863372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:16,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:16,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2022-03-19 23:26:16,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678308040] [2022-03-19 23:26:16,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:16,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-19 23:26:16,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:16,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-19 23:26:16,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 23:26:16,567 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:17,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:17,556 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2022-03-19 23:26:17,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 23:26:17,557 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2022-03-19 23:26:17,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:17,557 INFO L225 Difference]: With dead ends: 115 [2022-03-19 23:26:17,557 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 23:26:17,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8953 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3057, Invalid=16403, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 23:26:17,559 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 146 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:17,559 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 102 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:26:17,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 23:26:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2022-03-19 23:26:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 89 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:17,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2022-03-19 23:26:17,570 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 87 [2022-03-19 23:26:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:17,570 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2022-03-19 23:26:17,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2022-03-19 23:26:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 23:26:17,570 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:17,570 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:17,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:17,787 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,SelfDestructingSolverStorable57 [2022-03-19 23:26:17,787 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:17,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1786688683, now seen corresponding path program 26 times [2022-03-19 23:26:17,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:17,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444463669] [2022-03-19 23:26:17,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:17,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:17,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:17,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:18,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 23:26:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:18,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:18,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444463669] [2022-03-19 23:26:18,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444463669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:18,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243627714] [2022-03-19 23:26:18,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:26:18,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:18,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:18,282 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) [2022-03-19 23:26:18,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 23:26:18,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:26:18,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:18,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 23:26:18,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:19,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:20,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243627714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:20,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:20,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2022-03-19 23:26:20,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677681963] [2022-03-19 23:26:20,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:20,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-19 23:26:20,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:20,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-19 23:26:20,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 23:26:20,117 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:21,151 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2022-03-19 23:26:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 23:26:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2022-03-19 23:26:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:21,152 INFO L225 Difference]: With dead ends: 109 [2022-03-19 23:26:21,152 INFO L226 Difference]: Without dead ends: 99 [2022-03-19 23:26:21,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8864 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3057, Invalid=16403, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 23:26:21,155 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 142 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:21,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 130 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:26:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-19 23:26:21,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-03-19 23:26:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 88 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-03-19 23:26:21,164 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 87 [2022-03-19 23:26:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:21,164 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-03-19 23:26:21,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-03-19 23:26:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 23:26:21,164 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:21,164 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:21,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-19 23:26:21,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-19 23:26:21,380 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:21,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:21,380 INFO L85 PathProgramCache]: Analyzing trace with hash -769133225, now seen corresponding path program 27 times [2022-03-19 23:26:21,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:21,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298983424] [2022-03-19 23:26:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:21,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:21,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:21,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:21,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 23:26:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:21,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:21,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298983424] [2022-03-19 23:26:21,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298983424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:21,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062111547] [2022-03-19 23:26:21,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:26:21,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:21,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:21,897 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) [2022-03-19 23:26:21,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 23:26:22,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-19 23:26:22,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:22,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 23:26:22,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:22,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:24,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062111547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:24,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:24,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2022-03-19 23:26:24,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365997604] [2022-03-19 23:26:24,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:24,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-19 23:26:24,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:24,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-19 23:26:24,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2022-03-19 23:26:24,146 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:25,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:25,356 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-03-19 23:26:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 23:26:25,357 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 89 [2022-03-19 23:26:25,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:25,357 INFO L225 Difference]: With dead ends: 122 [2022-03-19 23:26:25,357 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 23:26:25,358 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10244 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3421, Invalid=19229, Unknown=0, NotChecked=0, Total=22650 [2022-03-19 23:26:25,371 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 182 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:25,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 122 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:26:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 23:26:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2022-03-19 23:26:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 91 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:25,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-03-19 23:26:25,380 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 89 [2022-03-19 23:26:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:25,380 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-03-19 23:26:25,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-03-19 23:26:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 23:26:25,380 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:25,380 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:25,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:25,581 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:25,581 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash 489970451, now seen corresponding path program 27 times [2022-03-19 23:26:25,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:25,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640513640] [2022-03-19 23:26:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:25,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:25,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:25,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:25,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 23:26:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:26,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:26,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640513640] [2022-03-19 23:26:26,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640513640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:26,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634866422] [2022-03-19 23:26:26,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:26:26,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:26,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:26,109 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) [2022-03-19 23:26:26,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 23:26:26,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-19 23:26:26,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 23:26:26,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:27,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:28,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634866422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:28,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:28,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2022-03-19 23:26:28,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942006587] [2022-03-19 23:26:28,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:28,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-19 23:26:28,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:28,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-19 23:26:28,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2022-03-19 23:26:28,236 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:29,375 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-03-19 23:26:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 23:26:29,375 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 89 [2022-03-19 23:26:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:29,375 INFO L225 Difference]: With dead ends: 117 [2022-03-19 23:26:29,376 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 23:26:29,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10260 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3421, Invalid=19229, Unknown=0, NotChecked=0, Total=22650 [2022-03-19 23:26:29,377 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 215 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:29,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 90 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:26:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 23:26:29,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2022-03-19 23:26:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.065217391304348) internal successors, (98), 94 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2022-03-19 23:26:29,386 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 89 [2022-03-19 23:26:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:29,386 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2022-03-19 23:26:29,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.9639639639639639) internal successors, (218), 110 states have internal predecessors, (218), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2022-03-19 23:26:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 23:26:29,386 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:29,386 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:29,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-19 23:26:29,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:29,587 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:29,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:29,587 INFO L85 PathProgramCache]: Analyzing trace with hash 982947093, now seen corresponding path program 28 times [2022-03-19 23:26:29,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:29,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726959263] [2022-03-19 23:26:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:29,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:29,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:29,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:29,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 23:26:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:30,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:30,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726959263] [2022-03-19 23:26:30,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726959263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:30,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330370680] [2022-03-19 23:26:30,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:26:30,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:30,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:30,028 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) [2022-03-19 23:26:30,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 23:26:30,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:26:30,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:30,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 23:26:30,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:30,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:32,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330370680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:32,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:32,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2022-03-19 23:26:32,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449189305] [2022-03-19 23:26:32,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:32,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-19 23:26:32,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-19 23:26:32,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2022-03-19 23:26:32,181 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:33,156 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2022-03-19 23:26:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 23:26:33,156 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 91 [2022-03-19 23:26:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:33,156 INFO L225 Difference]: With dead ends: 119 [2022-03-19 23:26:33,157 INFO L226 Difference]: Without dead ends: 107 [2022-03-19 23:26:33,158 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3415, Invalid=18341, Unknown=0, NotChecked=0, Total=21756 [2022-03-19 23:26:33,159 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 172 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:33,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 77 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:26:33,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-19 23:26:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-03-19 23:26:33,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.054945054945055) internal successors, (96), 93 states have internal predecessors, (96), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-03-19 23:26:33,168 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 91 [2022-03-19 23:26:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:33,168 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-03-19 23:26:33,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-03-19 23:26:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 23:26:33,169 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:33,169 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:33,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:33,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:33,371 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -538831371, now seen corresponding path program 28 times [2022-03-19 23:26:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:33,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833501849] [2022-03-19 23:26:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:33,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:33,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:33,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:33,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 23:26:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:33,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:33,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833501849] [2022-03-19 23:26:33,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833501849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:33,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429759106] [2022-03-19 23:26:33,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:26:33,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:33,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:33,896 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) [2022-03-19 23:26:33,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 23:26:34,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:26:34,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:34,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 23:26:34,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:34,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:36,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429759106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:36,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:36,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2022-03-19 23:26:36,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059508578] [2022-03-19 23:26:36,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:36,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-19 23:26:36,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:36,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-19 23:26:36,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2022-03-19 23:26:36,004 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:37,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:37,034 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-03-19 23:26:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 23:26:37,034 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 91 [2022-03-19 23:26:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:37,035 INFO L225 Difference]: With dead ends: 113 [2022-03-19 23:26:37,035 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 23:26:37,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9988 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3415, Invalid=18341, Unknown=0, NotChecked=0, Total=21756 [2022-03-19 23:26:37,037 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 178 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:37,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 105 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:26:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 23:26:37,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-03-19 23:26:37,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 92 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-03-19 23:26:37,046 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 91 [2022-03-19 23:26:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:37,046 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-03-19 23:26:37,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:37,046 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-03-19 23:26:37,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 23:26:37,046 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:37,046 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:37,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-19 23:26:37,264 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,SelfDestructingSolverStorable62 [2022-03-19 23:26:37,264 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:37,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash 125868023, now seen corresponding path program 29 times [2022-03-19 23:26:37,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:37,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903602493] [2022-03-19 23:26:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:37,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:37,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:37,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:37,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 23:26:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:37,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:37,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903602493] [2022-03-19 23:26:37,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903602493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:37,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284685246] [2022-03-19 23:26:37,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:26:37,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:37,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:37,767 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) [2022-03-19 23:26:37,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 23:26:37,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-03-19 23:26:37,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:37,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 23:26:37,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:38,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:40,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284685246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:40,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:40,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2022-03-19 23:26:40,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902899868] [2022-03-19 23:26:40,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:40,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-19 23:26:40,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:40,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-19 23:26:40,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2022-03-19 23:26:40,227 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:41,477 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-03-19 23:26:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 23:26:41,479 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 93 [2022-03-19 23:26:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:41,479 INFO L225 Difference]: With dead ends: 126 [2022-03-19 23:26:41,479 INFO L226 Difference]: Without dead ends: 115 [2022-03-19 23:26:41,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11451 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3797, Invalid=21325, Unknown=0, NotChecked=0, Total=25122 [2022-03-19 23:26:41,481 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:41,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 102 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:26:41,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-19 23:26:41,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-03-19 23:26:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 93 states have (on average 1.053763440860215) internal successors, (98), 95 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-03-19 23:26:41,496 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 93 [2022-03-19 23:26:41,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:41,497 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-03-19 23:26:41,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:41,497 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-03-19 23:26:41,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 23:26:41,497 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:41,497 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:41,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:41,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-03-19 23:26:41,698 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1035270605, now seen corresponding path program 29 times [2022-03-19 23:26:41,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:41,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144193750] [2022-03-19 23:26:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:41,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:41,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:41,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:41,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 23:26:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:42,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:42,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144193750] [2022-03-19 23:26:42,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144193750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:42,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988064326] [2022-03-19 23:26:42,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:26:42,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:42,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:42,266 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) [2022-03-19 23:26:42,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 23:26:42,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-03-19 23:26:42,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:42,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 23:26:42,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:43,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:44,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988064326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:44,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:44,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2022-03-19 23:26:44,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199280357] [2022-03-19 23:26:44,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:44,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-19 23:26:44,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:44,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-19 23:26:44,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2022-03-19 23:26:44,574 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:45,890 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2022-03-19 23:26:45,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 23:26:45,890 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 93 [2022-03-19 23:26:45,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:45,891 INFO L225 Difference]: With dead ends: 121 [2022-03-19 23:26:45,891 INFO L226 Difference]: Without dead ends: 112 [2022-03-19 23:26:45,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11468 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3797, Invalid=21325, Unknown=0, NotChecked=0, Total=25122 [2022-03-19 23:26:45,892 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 149 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:45,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 110 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:26:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-19 23:26:45,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2022-03-19 23:26:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.0625) internal successors, (102), 98 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2022-03-19 23:26:45,902 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 93 [2022-03-19 23:26:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:45,902 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2022-03-19 23:26:45,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9658119658119657) internal successors, (230), 116 states have internal predecessors, (230), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:45,902 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2022-03-19 23:26:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 23:26:45,903 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:45,903 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:45,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:46,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:46,109 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:46,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:46,109 INFO L85 PathProgramCache]: Analyzing trace with hash -189859787, now seen corresponding path program 30 times [2022-03-19 23:26:46,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:46,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300462927] [2022-03-19 23:26:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:46,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:46,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:46,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:46,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 23:26:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:46,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:46,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300462927] [2022-03-19 23:26:46,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300462927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:46,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064299631] [2022-03-19 23:26:46,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:26:46,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:46,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:46,574 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) [2022-03-19 23:26:46,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 23:26:46,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-19 23:26:46,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:46,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 23:26:46,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:47,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:48,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064299631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:48,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:48,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2022-03-19 23:26:48,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284001217] [2022-03-19 23:26:48,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:48,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-19 23:26:48,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-19 23:26:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2022-03-19 23:26:48,877 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:50,069 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-03-19 23:26:50,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 23:26:50,069 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 95 [2022-03-19 23:26:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:50,070 INFO L225 Difference]: With dead ends: 123 [2022-03-19 23:26:50,070 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 23:26:50,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11280 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3793, Invalid=20387, Unknown=0, NotChecked=0, Total=24180 [2022-03-19 23:26:50,071 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 197 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:50,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 92 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:26:50,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 23:26:50,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2022-03-19 23:26:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 97 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2022-03-19 23:26:50,089 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 95 [2022-03-19 23:26:50,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:50,089 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2022-03-19 23:26:50,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2022-03-19 23:26:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 23:26:50,089 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:50,090 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:50,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-19 23:26:50,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:50,309 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:50,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1943878037, now seen corresponding path program 30 times [2022-03-19 23:26:50,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:50,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000366740] [2022-03-19 23:26:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:50,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:50,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:50,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:50,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 23:26:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:50,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:50,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000366740] [2022-03-19 23:26:50,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000366740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:50,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930863680] [2022-03-19 23:26:50,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:26:50,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:50,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:50,882 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) [2022-03-19 23:26:50,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 23:26:51,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-19 23:26:51,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:26:51,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 23:26:51,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:51,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 289 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:53,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930863680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:53,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:53,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2022-03-19 23:26:53,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342139588] [2022-03-19 23:26:53,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:53,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-19 23:26:53,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-19 23:26:53,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2022-03-19 23:26:53,079 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:54,242 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2022-03-19 23:26:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 23:26:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 95 [2022-03-19 23:26:54,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:54,243 INFO L225 Difference]: With dead ends: 117 [2022-03-19 23:26:54,243 INFO L226 Difference]: Without dead ends: 107 [2022-03-19 23:26:54,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11179 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3793, Invalid=20387, Unknown=0, NotChecked=0, Total=24180 [2022-03-19 23:26:54,244 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 152 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:54,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 95 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:26:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-19 23:26:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-03-19 23:26:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 96 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2022-03-19 23:26:54,254 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 95 [2022-03-19 23:26:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:54,254 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2022-03-19 23:26:54,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2022-03-19 23:26:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 23:26:54,255 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:54,255 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:54,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-19 23:26:54,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-19 23:26:54,464 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:54,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1992207465, now seen corresponding path program 31 times [2022-03-19 23:26:54,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:54,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817007737] [2022-03-19 23:26:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:54,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:54,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:54,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:54,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 23:26:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:55,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:55,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817007737] [2022-03-19 23:26:55,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817007737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:55,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814507607] [2022-03-19 23:26:55,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:26:55,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:55,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:55,002 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) [2022-03-19 23:26:55,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 23:26:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 23:26:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:26:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:56,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:26:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:57,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814507607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:26:57,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:26:57,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2022-03-19 23:26:57,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574467277] [2022-03-19 23:26:57,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:26:57,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-03-19 23:26:57,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:26:57,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-03-19 23:26:57,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2022-03-19 23:26:57,629 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:26:59,066 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2022-03-19 23:26:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 23:26:59,067 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 97 [2022-03-19 23:26:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:26:59,071 INFO L225 Difference]: With dead ends: 130 [2022-03-19 23:26:59,071 INFO L226 Difference]: Without dead ends: 119 [2022-03-19 23:26:59,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12725 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4193, Invalid=23529, Unknown=0, NotChecked=0, Total=27722 [2022-03-19 23:26:59,073 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:26:59,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 127 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:26:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-19 23:26:59,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-03-19 23:26:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 99 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:26:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2022-03-19 23:26:59,084 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 97 [2022-03-19 23:26:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:26:59,084 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2022-03-19 23:26:59,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:26:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2022-03-19 23:26:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 23:26:59,084 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:26:59,084 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:26:59,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-19 23:26:59,291 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,SelfDestructingSolverStorable67 [2022-03-19 23:26:59,291 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:26:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:26:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1133925805, now seen corresponding path program 31 times [2022-03-19 23:26:59,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:26:59,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366096203] [2022-03-19 23:26:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:26:59,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:26:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:59,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:26:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:59,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:26:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:59,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 23:26:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:26:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:26:59,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:26:59,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366096203] [2022-03-19 23:26:59,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366096203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:26:59,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925128408] [2022-03-19 23:26:59,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:26:59,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:26:59,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:26:59,902 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) [2022-03-19 23:26:59,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 23:27:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:00,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 23:27:00,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:00,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:02,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925128408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:02,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:02,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2022-03-19 23:27:02,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204609257] [2022-03-19 23:27:02,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:02,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-03-19 23:27:02,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:02,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-03-19 23:27:02,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2022-03-19 23:27:02,397 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:03,713 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2022-03-19 23:27:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 23:27:03,713 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 97 [2022-03-19 23:27:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:03,714 INFO L225 Difference]: With dead ends: 125 [2022-03-19 23:27:03,714 INFO L226 Difference]: Without dead ends: 116 [2022-03-19 23:27:03,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12743 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4193, Invalid=23529, Unknown=0, NotChecked=0, Total=27722 [2022-03-19 23:27:03,715 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 222 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:03,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 90 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:27:03,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-19 23:27:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-03-19 23:27:03,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 100 states have (on average 1.06) internal successors, (106), 102 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:27:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2022-03-19 23:27:03,727 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 97 [2022-03-19 23:27:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:03,727 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2022-03-19 23:27:03,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.967479674796748) internal successors, (242), 122 states have internal predecessors, (242), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2022-03-19 23:27:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 23:27:03,728 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:03,728 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:03,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:03,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:03,935 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:03,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash -508226475, now seen corresponding path program 32 times [2022-03-19 23:27:03,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:03,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912945734] [2022-03-19 23:27:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:03,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:03,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:03,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:04,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 23:27:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:04,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:04,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912945734] [2022-03-19 23:27:04,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912945734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:04,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108216638] [2022-03-19 23:27:04,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:27:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:04,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:04,430 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) [2022-03-19 23:27:04,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-19 23:27:04,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:27:04,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 23:27:04,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:05,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:06,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108216638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:06,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:06,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2022-03-19 23:27:06,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131501919] [2022-03-19 23:27:06,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:06,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-03-19 23:27:06,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:06,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-03-19 23:27:06,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2022-03-19 23:27:06,899 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:08,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:08,123 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2022-03-19 23:27:08,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 23:27:08,124 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 99 [2022-03-19 23:27:08,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:08,124 INFO L225 Difference]: With dead ends: 127 [2022-03-19 23:27:08,124 INFO L226 Difference]: Without dead ends: 115 [2022-03-19 23:27:08,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12544 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4191, Invalid=22541, Unknown=0, NotChecked=0, Total=26732 [2022-03-19 23:27:08,127 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 157 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:08,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 102 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:27:08,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-19 23:27:08,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-03-19 23:27:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 101 states have internal predecessors, (104), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:27:08,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-03-19 23:27:08,138 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 99 [2022-03-19 23:27:08,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:08,138 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-03-19 23:27:08,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:08,138 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-03-19 23:27:08,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 23:27:08,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:08,139 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:08,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:08,358 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,SelfDestructingSolverStorable69 [2022-03-19 23:27:08,358 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1293415989, now seen corresponding path program 32 times [2022-03-19 23:27:08,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:08,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798585542] [2022-03-19 23:27:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:08,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:08,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:08,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:08,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 23:27:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:09,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:09,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798585542] [2022-03-19 23:27:09,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798585542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:09,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574236553] [2022-03-19 23:27:09,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:27:09,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:09,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:09,008 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) [2022-03-19 23:27:09,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-19 23:27:09,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:27:09,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:09,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 23:27:09,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:10,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 324 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:11,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574236553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:11,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:11,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2022-03-19 23:27:11,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568034952] [2022-03-19 23:27:11,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:11,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-03-19 23:27:11,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:11,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-03-19 23:27:11,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2022-03-19 23:27:11,481 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:12,741 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2022-03-19 23:27:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 23:27:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 99 [2022-03-19 23:27:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:12,742 INFO L225 Difference]: With dead ends: 121 [2022-03-19 23:27:12,742 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 23:27:12,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12437 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4191, Invalid=22541, Unknown=0, NotChecked=0, Total=26732 [2022-03-19 23:27:12,744 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 140 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:12,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 125 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:27:12,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 23:27:12,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-03-19 23:27:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 100 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:27:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-03-19 23:27:12,755 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 99 [2022-03-19 23:27:12,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:12,755 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-03-19 23:27:12,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:12,755 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-03-19 23:27:12,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-19 23:27:12,755 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:12,756 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:12,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:12,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:12,973 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:12,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:12,973 INFO L85 PathProgramCache]: Analyzing trace with hash -21010377, now seen corresponding path program 33 times [2022-03-19 23:27:12,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:12,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733882760] [2022-03-19 23:27:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:12,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:12,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:13,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:13,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 23:27:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:13,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:13,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733882760] [2022-03-19 23:27:13,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733882760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:13,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400226799] [2022-03-19 23:27:13,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:27:13,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:13,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:13,548 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) [2022-03-19 23:27:13,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-19 23:27:13,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-03-19 23:27:13,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:13,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 23:27:13,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:14,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:16,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400226799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:16,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:16,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2022-03-19 23:27:16,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405479065] [2022-03-19 23:27:16,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:16,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-03-19 23:27:16,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:16,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-03-19 23:27:16,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2022-03-19 23:27:16,320 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:17,856 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-03-19 23:27:17,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 23:27:17,857 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 101 [2022-03-19 23:27:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:17,858 INFO L225 Difference]: With dead ends: 134 [2022-03-19 23:27:17,858 INFO L226 Difference]: Without dead ends: 123 [2022-03-19 23:27:17,859 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14066 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4609, Invalid=25841, Unknown=0, NotChecked=0, Total=30450 [2022-03-19 23:27:17,859 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:17,859 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 112 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:27:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-19 23:27:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2022-03-19 23:27:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 103 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:27:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2022-03-19 23:27:17,870 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 101 [2022-03-19 23:27:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:17,870 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2022-03-19 23:27:17,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2022-03-19 23:27:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-19 23:27:17,871 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:17,871 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:17,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:18,084 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:18,084 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:18,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:18,085 INFO L85 PathProgramCache]: Analyzing trace with hash 174950259, now seen corresponding path program 33 times [2022-03-19 23:27:18,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:18,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172593742] [2022-03-19 23:27:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:18,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:18,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:18,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:18,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 23:27:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:18,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:18,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172593742] [2022-03-19 23:27:18,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172593742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:18,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936840221] [2022-03-19 23:27:18,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:27:18,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:18,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:18,747 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) [2022-03-19 23:27:18,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-19 23:27:18,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-03-19 23:27:18,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 23:27:18,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:19,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:21,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936840221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:21,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:21,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2022-03-19 23:27:21,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802901359] [2022-03-19 23:27:21,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:21,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-03-19 23:27:21,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-03-19 23:27:21,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2022-03-19 23:27:21,452 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:23,004 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2022-03-19 23:27:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 23:27:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 101 [2022-03-19 23:27:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:23,005 INFO L225 Difference]: With dead ends: 129 [2022-03-19 23:27:23,005 INFO L226 Difference]: Without dead ends: 120 [2022-03-19 23:27:23,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14085 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4609, Invalid=25841, Unknown=0, NotChecked=0, Total=30450 [2022-03-19 23:27:23,007 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:23,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 120 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:27:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-19 23:27:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2022-03-19 23:27:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 104 states have (on average 1.0576923076923077) internal successors, (110), 106 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:27:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2022-03-19 23:27:23,018 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 101 [2022-03-19 23:27:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:23,019 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2022-03-19 23:27:23,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9689922480620154) internal successors, (254), 128 states have internal predecessors, (254), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2022-03-19 23:27:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 23:27:23,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:23,020 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:23,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:23,235 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,SelfDestructingSolverStorable72 [2022-03-19 23:27:23,236 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:23,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1103746699, now seen corresponding path program 34 times [2022-03-19 23:27:23,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:23,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261413314] [2022-03-19 23:27:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:23,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:23,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:23,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:23,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 23:27:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:23,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:23,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261413314] [2022-03-19 23:27:23,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261413314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:23,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555455776] [2022-03-19 23:27:23,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:27:23,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:23,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:23,806 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) [2022-03-19 23:27:23,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-19 23:27:23,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:27:23,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:23,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 23:27:24,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:25,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:26,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555455776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:26,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:26,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2022-03-19 23:27:26,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183550905] [2022-03-19 23:27:26,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:26,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-03-19 23:27:26,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:26,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-03-19 23:27:26,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2022-03-19 23:27:26,573 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:27,934 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2022-03-19 23:27:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 23:27:27,934 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-03-19 23:27:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:27,935 INFO L225 Difference]: With dead ends: 131 [2022-03-19 23:27:27,935 INFO L226 Difference]: Without dead ends: 119 [2022-03-19 23:27:27,937 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13875 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4609, Invalid=24803, Unknown=0, NotChecked=0, Total=29412 [2022-03-19 23:27:27,937 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 148 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:27,937 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 112 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:27:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-19 23:27:27,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2022-03-19 23:27:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 105 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:27:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-03-19 23:27:27,948 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 103 [2022-03-19 23:27:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:27,948 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-03-19 23:27:27,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:27,949 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-03-19 23:27:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 23:27:27,949 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:27,949 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:27,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:28,166 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:28,166 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:28,166 INFO L85 PathProgramCache]: Analyzing trace with hash -618165291, now seen corresponding path program 34 times [2022-03-19 23:27:28,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:28,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092742022] [2022-03-19 23:27:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:28,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:28,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:28,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:28,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 23:27:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:28,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:28,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092742022] [2022-03-19 23:27:28,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092742022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:28,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027715984] [2022-03-19 23:27:28,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:27:28,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:28,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:28,851 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) [2022-03-19 23:27:28,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-19 23:27:29,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:27:29,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:29,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 23:27:29,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:29,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 361 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:31,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027715984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:31,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:31,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2022-03-19 23:27:31,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750546101] [2022-03-19 23:27:31,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:31,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-03-19 23:27:31,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:31,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-03-19 23:27:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2022-03-19 23:27:31,416 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:32,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:32,728 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-03-19 23:27:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 23:27:32,728 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-03-19 23:27:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:32,729 INFO L225 Difference]: With dead ends: 125 [2022-03-19 23:27:32,729 INFO L226 Difference]: Without dead ends: 115 [2022-03-19 23:27:32,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13762 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4609, Invalid=24803, Unknown=0, NotChecked=0, Total=29412 [2022-03-19 23:27:32,730 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:32,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 100 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:27:32,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-19 23:27:32,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-03-19 23:27:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 104 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:27:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-03-19 23:27:32,742 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 103 [2022-03-19 23:27:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:32,743 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-03-19 23:27:32,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:32,743 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-03-19 23:27:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 23:27:32,744 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:32,744 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:32,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:32,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:32,959 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:32,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1195382231, now seen corresponding path program 35 times [2022-03-19 23:27:32,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:32,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420282370] [2022-03-19 23:27:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:32,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:32,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:32,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:33,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 23:27:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:33,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:33,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420282370] [2022-03-19 23:27:33,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420282370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:33,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686362829] [2022-03-19 23:27:33,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:27:33,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:33,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:33,526 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) [2022-03-19 23:27:33,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-19 23:27:33,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-03-19 23:27:33,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:33,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 23:27:33,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:34,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:36,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686362829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:36,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:36,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2022-03-19 23:27:36,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545210513] [2022-03-19 23:27:36,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:36,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-03-19 23:27:36,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:36,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-03-19 23:27:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2022-03-19 23:27:36,510 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:38,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:38,129 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2022-03-19 23:27:38,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 23:27:38,129 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2022-03-19 23:27:38,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:38,129 INFO L225 Difference]: With dead ends: 138 [2022-03-19 23:27:38,129 INFO L226 Difference]: Without dead ends: 127 [2022-03-19 23:27:38,131 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15474 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5045, Invalid=28261, Unknown=0, NotChecked=0, Total=33306 [2022-03-19 23:27:38,131 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 209 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:38,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 127 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:27:38,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-19 23:27:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-03-19 23:27:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 107 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:27:38,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-03-19 23:27:38,150 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 105 [2022-03-19 23:27:38,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:38,150 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-03-19 23:27:38,151 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:38,151 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-03-19 23:27:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 23:27:38,151 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:38,151 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:38,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:38,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:38,367 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:38,368 INFO L85 PathProgramCache]: Analyzing trace with hash 555998611, now seen corresponding path program 35 times [2022-03-19 23:27:38,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:38,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476073988] [2022-03-19 23:27:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:38,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:38,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:38,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:38,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 23:27:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:39,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:39,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476073988] [2022-03-19 23:27:39,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476073988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:39,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20865014] [2022-03-19 23:27:39,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:27:39,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:39,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:39,132 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) [2022-03-19 23:27:39,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-19 23:27:39,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-03-19 23:27:39,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:39,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 23:27:39,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:40,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:41,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20865014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:41,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:41,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2022-03-19 23:27:41,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179477187] [2022-03-19 23:27:41,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:41,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-03-19 23:27:41,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:41,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-03-19 23:27:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2022-03-19 23:27:41,999 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:43,587 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2022-03-19 23:27:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 23:27:43,588 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2022-03-19 23:27:43,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:43,588 INFO L225 Difference]: With dead ends: 133 [2022-03-19 23:27:43,588 INFO L226 Difference]: Without dead ends: 124 [2022-03-19 23:27:43,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15494 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5045, Invalid=28261, Unknown=0, NotChecked=0, Total=33306 [2022-03-19 23:27:43,590 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:43,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 120 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:27:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-19 23:27:43,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2022-03-19 23:27:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 110 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:27:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2022-03-19 23:27:43,603 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 105 [2022-03-19 23:27:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:43,603 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2022-03-19 23:27:43,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 134 states have internal predecessors, (266), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2022-03-19 23:27:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 23:27:43,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:43,604 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:43,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:43,821 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,SelfDestructingSolverStorable76 [2022-03-19 23:27:43,821 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:43,821 INFO L85 PathProgramCache]: Analyzing trace with hash 11499413, now seen corresponding path program 36 times [2022-03-19 23:27:43,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:43,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129665102] [2022-03-19 23:27:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:43,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:43,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:43,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:44,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 23:27:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:44,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:44,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129665102] [2022-03-19 23:27:44,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129665102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:44,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889241298] [2022-03-19 23:27:44,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:27:44,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:44,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:44,395 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) [2022-03-19 23:27:44,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-19 23:27:44,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-03-19 23:27:44,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:44,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-19 23:27:44,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:45,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:47,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889241298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:47,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:47,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2022-03-19 23:27:47,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111070190] [2022-03-19 23:27:47,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:47,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-19 23:27:47,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:47,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-19 23:27:47,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2022-03-19 23:27:47,262 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:48,630 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2022-03-19 23:27:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 23:27:48,630 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 107 [2022-03-19 23:27:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:48,631 INFO L225 Difference]: With dead ends: 135 [2022-03-19 23:27:48,631 INFO L226 Difference]: Without dead ends: 123 [2022-03-19 23:27:48,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15273 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5047, Invalid=27173, Unknown=0, NotChecked=0, Total=32220 [2022-03-19 23:27:48,633 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:48,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 107 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:27:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-19 23:27:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2022-03-19 23:27:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 109 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:27:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2022-03-19 23:27:48,647 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 107 [2022-03-19 23:27:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:48,647 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2022-03-19 23:27:48,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2022-03-19 23:27:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 23:27:48,648 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:48,648 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:48,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:48,865 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:48,865 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:48,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1517208971, now seen corresponding path program 36 times [2022-03-19 23:27:48,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:48,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918849785] [2022-03-19 23:27:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:48,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:48,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:48,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:49,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 23:27:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:49,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918849785] [2022-03-19 23:27:49,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918849785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:49,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483238609] [2022-03-19 23:27:49,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:27:49,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:49,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:49,582 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) [2022-03-19 23:27:49,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-19 23:27:49,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-03-19 23:27:49,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:49,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-19 23:27:49,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:50,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 400 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:52,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483238609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:52,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:52,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2022-03-19 23:27:52,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893361446] [2022-03-19 23:27:52,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:52,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-19 23:27:52,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:52,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-19 23:27:52,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2022-03-19 23:27:52,484 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:54,020 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2022-03-19 23:27:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 23:27:54,020 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 107 [2022-03-19 23:27:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:54,021 INFO L225 Difference]: With dead ends: 129 [2022-03-19 23:27:54,021 INFO L226 Difference]: Without dead ends: 119 [2022-03-19 23:27:54,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15154 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5047, Invalid=27173, Unknown=0, NotChecked=0, Total=32220 [2022-03-19 23:27:54,023 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 213 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:54,023 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 110 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:27:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-19 23:27:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-03-19 23:27:54,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 108 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:27:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-03-19 23:27:54,035 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 107 [2022-03-19 23:27:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:54,036 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-03-19 23:27:54,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-03-19 23:27:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-19 23:27:54,036 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:54,036 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:54,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:54,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:54,254 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash 502832247, now seen corresponding path program 37 times [2022-03-19 23:27:54,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:54,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750155061] [2022-03-19 23:27:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:54,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:54,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:54,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:27:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:54,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 23:27:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:54,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:54,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750155061] [2022-03-19 23:27:54,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750155061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:54,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290475625] [2022-03-19 23:27:54,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:27:54,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:54,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:54,979 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) [2022-03-19 23:27:54,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-19 23:27:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:55,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 23:27:55,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:56,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:58,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290475625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:58,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:58,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2022-03-19 23:27:58,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48081870] [2022-03-19 23:27:58,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:58,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-03-19 23:27:58,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:58,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-03-19 23:27:58,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2022-03-19 23:27:58,245 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:27:59,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:59,993 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2022-03-19 23:27:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 23:27:59,994 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 109 [2022-03-19 23:27:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:59,994 INFO L225 Difference]: With dead ends: 142 [2022-03-19 23:27:59,994 INFO L226 Difference]: Without dead ends: 131 [2022-03-19 23:27:59,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16949 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5501, Invalid=30789, Unknown=0, NotChecked=0, Total=36290 [2022-03-19 23:27:59,996 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 207 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:59,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 132 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:27:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-19 23:28:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2022-03-19 23:28:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 111 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:28:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-03-19 23:28:00,010 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 109 [2022-03-19 23:28:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:00,010 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-03-19 23:28:00,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-03-19 23:28:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-19 23:28:00,011 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:00,011 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:00,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:00,224 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,SelfDestructingSolverStorable79 [2022-03-19 23:28:00,224 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:00,225 INFO L85 PathProgramCache]: Analyzing trace with hash 256502963, now seen corresponding path program 37 times [2022-03-19 23:28:00,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:00,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471487600] [2022-03-19 23:28:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:00,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:00,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:00,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:00,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 23:28:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:00,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:00,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471487600] [2022-03-19 23:28:00,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471487600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:00,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744535587] [2022-03-19 23:28:00,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:28:00,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:00,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:00,993 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) [2022-03-19 23:28:00,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-19 23:28:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:01,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 23:28:01,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:02,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:04,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744535587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:04,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:04,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2022-03-19 23:28:04,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877114505] [2022-03-19 23:28:04,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:04,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-03-19 23:28:04,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:04,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-03-19 23:28:04,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2022-03-19 23:28:04,071 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:05,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:05,661 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2022-03-19 23:28:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 23:28:05,661 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 109 [2022-03-19 23:28:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:05,662 INFO L225 Difference]: With dead ends: 137 [2022-03-19 23:28:05,662 INFO L226 Difference]: Without dead ends: 128 [2022-03-19 23:28:05,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16970 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5501, Invalid=30789, Unknown=0, NotChecked=0, Total=36290 [2022-03-19 23:28:05,664 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 293 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:05,664 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 90 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:28:05,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-19 23:28:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2022-03-19 23:28:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.0535714285714286) internal successors, (118), 114 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:28:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2022-03-19 23:28:05,677 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 109 [2022-03-19 23:28:05,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:05,677 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2022-03-19 23:28:05,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9716312056737588) internal successors, (278), 140 states have internal predecessors, (278), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2022-03-19 23:28:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 23:28:05,678 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:05,678 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:05,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-19 23:28:05,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:05,883 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash -41009483, now seen corresponding path program 38 times [2022-03-19 23:28:05,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:05,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395960845] [2022-03-19 23:28:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:05,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:05,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:05,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:06,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 23:28:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:06,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:06,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395960845] [2022-03-19 23:28:06,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395960845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:06,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53861488] [2022-03-19 23:28:06,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:28:06,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:06,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:06,516 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) [2022-03-19 23:28:06,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-19 23:28:06,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:28:06,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:06,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 23:28:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:07,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:09,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53861488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:09,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:09,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 140 [2022-03-19 23:28:09,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295762608] [2022-03-19 23:28:09,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:09,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-19 23:28:09,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:09,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-19 23:28:09,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3233, Invalid=16227, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 23:28:09,684 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:11,245 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2022-03-19 23:28:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 23:28:11,245 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2022-03-19 23:28:11,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:11,246 INFO L225 Difference]: With dead ends: 139 [2022-03-19 23:28:11,246 INFO L226 Difference]: Without dead ends: 127 [2022-03-19 23:28:11,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16738 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5505, Invalid=29651, Unknown=0, NotChecked=0, Total=35156 [2022-03-19 23:28:11,248 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:11,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 122 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:28:11,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-19 23:28:11,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2022-03-19 23:28:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 111 states have (on average 1.045045045045045) internal successors, (116), 113 states have internal predecessors, (116), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:28:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2022-03-19 23:28:11,262 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 111 [2022-03-19 23:28:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:11,262 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2022-03-19 23:28:11,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2022-03-19 23:28:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 23:28:11,262 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:11,263 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:11,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:11,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:11,480 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:11,480 INFO L85 PathProgramCache]: Analyzing trace with hash -271957483, now seen corresponding path program 38 times [2022-03-19 23:28:11,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:11,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747303716] [2022-03-19 23:28:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:11,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:11,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:11,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:11,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 23:28:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:12,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:12,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747303716] [2022-03-19 23:28:12,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747303716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:12,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339411967] [2022-03-19 23:28:12,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:28:12,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:12,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:12,262 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) [2022-03-19 23:28:12,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-19 23:28:12,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:28:12,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:12,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 23:28:12,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:13,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 441 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:15,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339411967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:15,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:15,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 49] total 140 [2022-03-19 23:28:15,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502938107] [2022-03-19 23:28:15,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:15,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-19 23:28:15,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:15,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-19 23:28:15,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3233, Invalid=16227, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 23:28:15,313 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:16,714 INFO L93 Difference]: Finished difference Result 133 states and 136 transitions. [2022-03-19 23:28:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 23:28:16,714 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2022-03-19 23:28:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:16,714 INFO L225 Difference]: With dead ends: 133 [2022-03-19 23:28:16,715 INFO L226 Difference]: Without dead ends: 123 [2022-03-19 23:28:16,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16613 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5505, Invalid=29651, Unknown=0, NotChecked=0, Total=35156 [2022-03-19 23:28:16,717 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 190 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:16,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 85 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:28:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-19 23:28:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-03-19 23:28:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 112 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:28:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-03-19 23:28:16,737 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 111 [2022-03-19 23:28:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:16,737 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-03-19 23:28:16,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:16,737 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-03-19 23:28:16,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 23:28:16,737 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:16,737 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:16,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:16,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:16,948 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:16,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:16,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1106363369, now seen corresponding path program 39 times [2022-03-19 23:28:16,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:16,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699393220] [2022-03-19 23:28:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:16,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:16,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:16,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:17,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 23:28:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:17,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:17,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699393220] [2022-03-19 23:28:17,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699393220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:17,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606478731] [2022-03-19 23:28:17,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:28:17,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:17,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:17,633 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) [2022-03-19 23:28:17,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-19 23:28:17,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-19 23:28:17,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:17,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 23:28:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:19,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:21,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606478731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:21,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:21,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 147 [2022-03-19 23:28:21,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007351951] [2022-03-19 23:28:21,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:21,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-03-19 23:28:21,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:21,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-03-19 23:28:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=17983, Unknown=0, NotChecked=0, Total=21462 [2022-03-19 23:28:21,084 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:22,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:22,887 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2022-03-19 23:28:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 23:28:22,887 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 113 [2022-03-19 23:28:22,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:22,888 INFO L225 Difference]: With dead ends: 146 [2022-03-19 23:28:22,888 INFO L226 Difference]: Without dead ends: 135 [2022-03-19 23:28:22,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18491 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5977, Invalid=33425, Unknown=0, NotChecked=0, Total=39402 [2022-03-19 23:28:22,890 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 229 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:22,890 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 112 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:28:22,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-19 23:28:22,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 125. [2022-03-19 23:28:22,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 115 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:28:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-03-19 23:28:22,903 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 113 [2022-03-19 23:28:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:22,904 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-03-19 23:28:22,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-03-19 23:28:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 23:28:22,904 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:22,904 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:22,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:23,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-19 23:28:23,119 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:23,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1584597805, now seen corresponding path program 39 times [2022-03-19 23:28:23,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:23,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911675855] [2022-03-19 23:28:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:23,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 23:28:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:23,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:23,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911675855] [2022-03-19 23:28:23,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911675855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:23,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146778089] [2022-03-19 23:28:23,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:28:23,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:23,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:23,990 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) [2022-03-19 23:28:23,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-19 23:28:24,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-19 23:28:24,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 23:28:24,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:25,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 441 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:27,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146778089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:27,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:27,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 147 [2022-03-19 23:28:27,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130199317] [2022-03-19 23:28:27,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:27,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-03-19 23:28:27,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:27,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-03-19 23:28:27,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=17983, Unknown=0, NotChecked=0, Total=21462 [2022-03-19 23:28:27,362 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:29,105 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2022-03-19 23:28:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 23:28:29,105 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 113 [2022-03-19 23:28:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:29,106 INFO L225 Difference]: With dead ends: 141 [2022-03-19 23:28:29,106 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 23:28:29,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18513 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5977, Invalid=33425, Unknown=0, NotChecked=0, Total=39402 [2022-03-19 23:28:29,109 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 239 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:29,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 120 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:28:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 23:28:29,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2022-03-19 23:28:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 116 states have (on average 1.0517241379310345) internal successors, (122), 118 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:28:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2022-03-19 23:28:29,123 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 113 [2022-03-19 23:28:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:29,123 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2022-03-19 23:28:29,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9727891156462585) internal successors, (290), 146 states have internal predecessors, (290), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2022-03-19 23:28:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 23:28:29,124 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:29,124 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:29,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:29,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:29,327 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:29,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:29,328 INFO L85 PathProgramCache]: Analyzing trace with hash 187678421, now seen corresponding path program 40 times [2022-03-19 23:28:29,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:29,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304463408] [2022-03-19 23:28:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:29,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:29,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:29,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:29,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 23:28:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:30,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:30,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304463408] [2022-03-19 23:28:30,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304463408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:30,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57090107] [2022-03-19 23:28:30,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:28:30,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:30,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:30,015 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) [2022-03-19 23:28:30,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-19 23:28:30,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:28:30,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:30,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-19 23:28:30,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:31,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:33,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57090107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:33,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:33,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 51] total 146 [2022-03-19 23:28:33,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287801131] [2022-03-19 23:28:33,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:33,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-03-19 23:28:33,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:33,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-03-19 23:28:33,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3517, Invalid=17653, Unknown=0, NotChecked=0, Total=21170 [2022-03-19 23:28:33,299 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:34,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:34,894 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2022-03-19 23:28:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 23:28:34,894 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 115 [2022-03-19 23:28:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:34,895 INFO L225 Difference]: With dead ends: 143 [2022-03-19 23:28:34,895 INFO L226 Difference]: Without dead ends: 131 [2022-03-19 23:28:34,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18270 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5983, Invalid=32237, Unknown=0, NotChecked=0, Total=38220 [2022-03-19 23:28:34,897 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 174 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:34,897 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 102 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:28:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-19 23:28:34,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2022-03-19 23:28:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 117 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:28:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-03-19 23:28:34,911 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 115 [2022-03-19 23:28:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:34,911 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-03-19 23:28:34,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-03-19 23:28:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 23:28:34,911 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:34,911 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:34,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-19 23:28:35,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:35,113 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:35,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1563943605, now seen corresponding path program 40 times [2022-03-19 23:28:35,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:35,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761785839] [2022-03-19 23:28:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:35,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:35,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:35,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:35,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 23:28:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:35,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761785839] [2022-03-19 23:28:35,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761785839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484897848] [2022-03-19 23:28:35,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:28:35,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:35,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:35,938 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) [2022-03-19 23:28:35,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-19 23:28:36,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:28:36,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:36,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-19 23:28:36,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:37,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 484 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:39,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484897848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:39,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:39,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 51] total 146 [2022-03-19 23:28:39,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940204758] [2022-03-19 23:28:39,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:39,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-03-19 23:28:39,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:39,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-03-19 23:28:39,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3517, Invalid=17653, Unknown=0, NotChecked=0, Total=21170 [2022-03-19 23:28:39,105 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:40,653 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-03-19 23:28:40,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 23:28:40,653 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 115 [2022-03-19 23:28:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:40,654 INFO L225 Difference]: With dead ends: 137 [2022-03-19 23:28:40,654 INFO L226 Difference]: Without dead ends: 127 [2022-03-19 23:28:40,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18139 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5983, Invalid=32237, Unknown=0, NotChecked=0, Total=38220 [2022-03-19 23:28:40,656 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 196 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:40,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 105 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:28:40,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-19 23:28:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-03-19 23:28:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 116 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:28:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-03-19 23:28:40,670 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 115 [2022-03-19 23:28:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:40,670 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-03-19 23:28:40,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-03-19 23:28:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-19 23:28:40,670 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:40,670 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:40,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-19 23:28:40,883 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,SelfDestructingSolverStorable86 [2022-03-19 23:28:40,883 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2036976457, now seen corresponding path program 41 times [2022-03-19 23:28:40,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:40,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304935555] [2022-03-19 23:28:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:40,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:40,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:40,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:41,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 23:28:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:41,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:41,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304935555] [2022-03-19 23:28:41,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304935555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:41,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484028367] [2022-03-19 23:28:41,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:28:41,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:41,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:41,605 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) [2022-03-19 23:28:41,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-19 23:28:41,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-03-19 23:28:41,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:41,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 23:28:41,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:43,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:45,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484028367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:45,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:45,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 153 [2022-03-19 23:28:45,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459028944] [2022-03-19 23:28:45,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:45,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-03-19 23:28:45,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:45,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-03-19 23:28:45,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3773, Invalid=19483, Unknown=0, NotChecked=0, Total=23256 [2022-03-19 23:28:45,314 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:47,190 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2022-03-19 23:28:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 23:28:47,191 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 117 [2022-03-19 23:28:47,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:47,191 INFO L225 Difference]: With dead ends: 150 [2022-03-19 23:28:47,191 INFO L226 Difference]: Without dead ends: 139 [2022-03-19 23:28:47,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20100 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6473, Invalid=36169, Unknown=0, NotChecked=0, Total=42642 [2022-03-19 23:28:47,193 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:47,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 102 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:28:47,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-19 23:28:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2022-03-19 23:28:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 119 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:28:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2022-03-19 23:28:47,210 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 117 [2022-03-19 23:28:47,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:47,210 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2022-03-19 23:28:47,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2022-03-19 23:28:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-19 23:28:47,210 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:47,211 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:47,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-19 23:28:47,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:47,414 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:47,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2037762573, now seen corresponding path program 41 times [2022-03-19 23:28:47,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:47,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170252250] [2022-03-19 23:28:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:47,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:47,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:47,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:47,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 23:28:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:48,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:48,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170252250] [2022-03-19 23:28:48,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170252250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:48,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445571931] [2022-03-19 23:28:48,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:28:48,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:48,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:48,302 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) [2022-03-19 23:28:48,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-19 23:28:48,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-03-19 23:28:48,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:48,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 23:28:48,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:49,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:51,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445571931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:51,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:51,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 153 [2022-03-19 23:28:51,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481491586] [2022-03-19 23:28:51,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:51,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-03-19 23:28:51,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:51,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-03-19 23:28:51,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3773, Invalid=19483, Unknown=0, NotChecked=0, Total=23256 [2022-03-19 23:28:51,862 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:53,784 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2022-03-19 23:28:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 23:28:53,784 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 117 [2022-03-19 23:28:53,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:53,785 INFO L225 Difference]: With dead ends: 145 [2022-03-19 23:28:53,785 INFO L226 Difference]: Without dead ends: 136 [2022-03-19 23:28:53,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20123 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6473, Invalid=36169, Unknown=0, NotChecked=0, Total=42642 [2022-03-19 23:28:53,788 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 227 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:53,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 130 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:28:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-19 23:28:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2022-03-19 23:28:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.05) internal successors, (126), 122 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:28:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2022-03-19 23:28:53,803 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 117 [2022-03-19 23:28:53,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:53,803 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2022-03-19 23:28:53,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.973856209150327) internal successors, (302), 152 states have internal predecessors, (302), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:28:53,803 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2022-03-19 23:28:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-19 23:28:53,804 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:53,804 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:53,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:54,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:54,021 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:54,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:54,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1511966731, now seen corresponding path program 42 times [2022-03-19 23:28:54,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:54,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023165555] [2022-03-19 23:28:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:54,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:54,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:54,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:28:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:54,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 23:28:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:54,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:54,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023165555] [2022-03-19 23:28:54,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023165555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:54,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020766933] [2022-03-19 23:28:54,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:28:54,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:54,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:54,747 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) [2022-03-19 23:28:54,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-19 23:28:55,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-03-19 23:28:55,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:55,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 23:28:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:56,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:58,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020766933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:58,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:58,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 53, 53] total 152 [2022-03-19 23:28:58,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553893725] [2022-03-19 23:28:58,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:58,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-03-19 23:28:58,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-03-19 23:28:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3813, Invalid=19139, Unknown=0, NotChecked=0, Total=22952 [2022-03-19 23:28:58,336 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:00,025 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2022-03-19 23:29:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 23:29:00,026 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 119 [2022-03-19 23:29:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:00,026 INFO L225 Difference]: With dead ends: 147 [2022-03-19 23:29:00,026 INFO L226 Difference]: Without dead ends: 135 [2022-03-19 23:29:00,028 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19869 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6481, Invalid=34931, Unknown=0, NotChecked=0, Total=41412 [2022-03-19 23:29:00,029 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:00,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 92 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:29:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-19 23:29:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-03-19 23:29:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 121 states have internal predecessors, (124), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:29:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-03-19 23:29:00,044 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 119 [2022-03-19 23:29:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:00,044 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-03-19 23:29:00,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-03-19 23:29:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-19 23:29:00,045 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:00,045 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:00,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-19 23:29:00,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-19 23:29:00,251 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1792058283, now seen corresponding path program 42 times [2022-03-19 23:29:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:00,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420327917] [2022-03-19 23:29:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:00,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:00,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:00,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 23:29:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:01,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420327917] [2022-03-19 23:29:01,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420327917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61156945] [2022-03-19 23:29:01,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:29:01,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:01,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:01,189 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) [2022-03-19 23:29:01,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-19 23:29:01,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-03-19 23:29:01,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 23:29:01,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:02,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 529 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:04,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61156945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:04,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:04,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 53, 53] total 152 [2022-03-19 23:29:04,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459566883] [2022-03-19 23:29:04,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:04,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-03-19 23:29:04,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-03-19 23:29:04,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3813, Invalid=19139, Unknown=0, NotChecked=0, Total=22952 [2022-03-19 23:29:04,538 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:06,181 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2022-03-19 23:29:06,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 23:29:06,181 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 119 [2022-03-19 23:29:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:06,182 INFO L225 Difference]: With dead ends: 141 [2022-03-19 23:29:06,182 INFO L226 Difference]: Without dead ends: 131 [2022-03-19 23:29:06,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19732 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6481, Invalid=34931, Unknown=0, NotChecked=0, Total=41412 [2022-03-19 23:29:06,185 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 223 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:06,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 100 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:29:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-19 23:29:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-03-19 23:29:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 120 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:29:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-03-19 23:29:06,205 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 119 [2022-03-19 23:29:06,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:06,205 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-03-19 23:29:06,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:06,206 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-03-19 23:29:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-19 23:29:06,206 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:06,206 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:06,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-19 23:29:06,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:06,407 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:06,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1634351529, now seen corresponding path program 43 times [2022-03-19 23:29:06,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:06,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609069804] [2022-03-19 23:29:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:06,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:06,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:06,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:06,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 23:29:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:07,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:07,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609069804] [2022-03-19 23:29:07,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609069804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:07,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057531084] [2022-03-19 23:29:07,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:29:07,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:07,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:07,204 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) [2022-03-19 23:29:07,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-19 23:29:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:07,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 23:29:07,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:08,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:11,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057531084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:11,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:11,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 159 [2022-03-19 23:29:11,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270009100] [2022-03-19 23:29:11,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:11,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-03-19 23:29:11,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:11,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-03-19 23:29:11,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4079, Invalid=21043, Unknown=0, NotChecked=0, Total=25122 [2022-03-19 23:29:11,149 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:13,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:13,189 INFO L93 Difference]: Finished difference Result 154 states and 161 transitions. [2022-03-19 23:29:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 23:29:13,189 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2022-03-19 23:29:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:13,190 INFO L225 Difference]: With dead ends: 154 [2022-03-19 23:29:13,190 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 23:29:13,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21776 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6989, Invalid=39021, Unknown=0, NotChecked=0, Total=46010 [2022-03-19 23:29:13,193 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 170 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:13,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 112 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:29:13,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 23:29:13,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2022-03-19 23:29:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 123 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:29:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2022-03-19 23:29:13,220 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 121 [2022-03-19 23:29:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:13,221 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2022-03-19 23:29:13,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2022-03-19 23:29:13,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-19 23:29:13,221 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:13,221 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:13,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-19 23:29:13,422 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:13,422 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:13,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:13,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1926164499, now seen corresponding path program 43 times [2022-03-19 23:29:13,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:13,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389974470] [2022-03-19 23:29:13,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:13,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:13,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:13,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:13,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 23:29:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:14,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:14,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389974470] [2022-03-19 23:29:14,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389974470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:14,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115561358] [2022-03-19 23:29:14,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:29:14,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:14,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:14,370 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) [2022-03-19 23:29:14,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-19 23:29:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:14,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 23:29:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:16,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:18,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115561358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:18,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:18,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 159 [2022-03-19 23:29:18,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490499600] [2022-03-19 23:29:18,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:18,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-03-19 23:29:18,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:18,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-03-19 23:29:18,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4079, Invalid=21043, Unknown=0, NotChecked=0, Total=25122 [2022-03-19 23:29:18,075 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:19,965 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2022-03-19 23:29:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 23:29:19,966 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2022-03-19 23:29:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:19,966 INFO L225 Difference]: With dead ends: 149 [2022-03-19 23:29:19,966 INFO L226 Difference]: Without dead ends: 140 [2022-03-19 23:29:19,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21800 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6989, Invalid=39021, Unknown=0, NotChecked=0, Total=46010 [2022-03-19 23:29:19,969 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 210 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:19,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 80 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:29:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-19 23:29:19,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2022-03-19 23:29:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.0483870967741935) internal successors, (130), 126 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:29:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2022-03-19 23:29:19,997 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 121 [2022-03-19 23:29:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:19,997 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2022-03-19 23:29:19,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.9748427672955975) internal successors, (314), 158 states have internal predecessors, (314), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:19,997 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2022-03-19 23:29:19,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-19 23:29:19,998 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:19,998 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:20,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-19 23:29:20,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:20,215 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:20,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1814042091, now seen corresponding path program 44 times [2022-03-19 23:29:20,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:20,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715490567] [2022-03-19 23:29:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:20,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:20,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:20,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 23:29:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:20,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:20,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715490567] [2022-03-19 23:29:20,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715490567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:20,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689635647] [2022-03-19 23:29:20,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:29:20,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:20,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:20,993 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) [2022-03-19 23:29:20,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-19 23:29:21,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:29:21,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:21,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-19 23:29:21,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:22,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:24,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689635647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:24,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:24,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 55, 55] total 158 [2022-03-19 23:29:24,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425124919] [2022-03-19 23:29:24,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:24,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-03-19 23:29:24,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:24,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-03-19 23:29:24,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4121, Invalid=20685, Unknown=0, NotChecked=0, Total=24806 [2022-03-19 23:29:24,826 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:26,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:26,664 INFO L93 Difference]: Finished difference Result 151 states and 156 transitions. [2022-03-19 23:29:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 23:29:26,665 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2022-03-19 23:29:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:26,665 INFO L225 Difference]: With dead ends: 151 [2022-03-19 23:29:26,665 INFO L226 Difference]: Without dead ends: 139 [2022-03-19 23:29:26,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21535 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6999, Invalid=37733, Unknown=0, NotChecked=0, Total=44732 [2022-03-19 23:29:26,669 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:26,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 92 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:29:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-19 23:29:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2022-03-19 23:29:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 125 states have internal predecessors, (128), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:29:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-03-19 23:29:26,689 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 123 [2022-03-19 23:29:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:26,689 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-03-19 23:29:26,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-03-19 23:29:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-19 23:29:26,690 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:26,690 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:26,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-19 23:29:26,897 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-03-19 23:29:26,898 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash -420090123, now seen corresponding path program 44 times [2022-03-19 23:29:26,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:26,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083445564] [2022-03-19 23:29:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:26,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:26,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:26,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:27,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 23:29:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:27,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:27,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083445564] [2022-03-19 23:29:27,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083445564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393216466] [2022-03-19 23:29:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:29:27,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:27,853 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) [2022-03-19 23:29:27,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-19 23:29:28,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:29:28,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:28,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-19 23:29:28,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:29,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 576 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:31,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393216466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:31,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:31,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 55, 55] total 158 [2022-03-19 23:29:31,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2790815] [2022-03-19 23:29:31,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:31,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-03-19 23:29:31,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:31,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-03-19 23:29:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4121, Invalid=20685, Unknown=0, NotChecked=0, Total=24806 [2022-03-19 23:29:31,506 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:33,187 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2022-03-19 23:29:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 23:29:33,188 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2022-03-19 23:29:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:33,188 INFO L225 Difference]: With dead ends: 145 [2022-03-19 23:29:33,188 INFO L226 Difference]: Without dead ends: 135 [2022-03-19 23:29:33,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21392 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6999, Invalid=37733, Unknown=0, NotChecked=0, Total=44732 [2022-03-19 23:29:33,191 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 254 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:33,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 70 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:29:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-19 23:29:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-03-19 23:29:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 124 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:29:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-03-19 23:29:33,207 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 123 [2022-03-19 23:29:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:33,208 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-03-19 23:29:33,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:33,208 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-03-19 23:29:33,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-19 23:29:33,208 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:33,208 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:33,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-19 23:29:33,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:33,409 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:33,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:33,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1727909641, now seen corresponding path program 45 times [2022-03-19 23:29:33,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:33,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574109029] [2022-03-19 23:29:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:33,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:33,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:33,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:33,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 23:29:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:34,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:34,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574109029] [2022-03-19 23:29:34,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574109029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:34,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913405638] [2022-03-19 23:29:34,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:29:34,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:34,239 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) [2022-03-19 23:29:34,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-19 23:29:34,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-03-19 23:29:34,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:34,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 23:29:34,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:36,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:38,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913405638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:38,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:38,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 165 [2022-03-19 23:29:38,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123696731] [2022-03-19 23:29:38,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:38,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-03-19 23:29:38,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-03-19 23:29:38,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4397, Invalid=22663, Unknown=0, NotChecked=0, Total=27060 [2022-03-19 23:29:38,474 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:40,714 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2022-03-19 23:29:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-19 23:29:40,715 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 125 [2022-03-19 23:29:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:40,715 INFO L225 Difference]: With dead ends: 158 [2022-03-19 23:29:40,715 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 23:29:40,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23519 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7525, Invalid=41981, Unknown=0, NotChecked=0, Total=49506 [2022-03-19 23:29:40,717 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:40,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 127 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:29:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 23:29:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2022-03-19 23:29:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 125 states have (on average 1.04) internal successors, (130), 127 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:29:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-03-19 23:29:40,734 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 125 [2022-03-19 23:29:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:40,734 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-03-19 23:29:40,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-03-19 23:29:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-19 23:29:40,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:40,734 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:40,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-19 23:29:40,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:40,935 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:40,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:40,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1155031859, now seen corresponding path program 45 times [2022-03-19 23:29:40,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:40,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981554898] [2022-03-19 23:29:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:40,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:40,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:40,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:41,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 23:29:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:41,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:41,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981554898] [2022-03-19 23:29:41,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981554898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:41,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324498931] [2022-03-19 23:29:41,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:29:41,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:41,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:41,920 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) [2022-03-19 23:29:41,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-19 23:29:42,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-03-19 23:29:42,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:42,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 23:29:42,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:43,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:45,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324498931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:45,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:45,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 165 [2022-03-19 23:29:45,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142661819] [2022-03-19 23:29:45,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:45,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-03-19 23:29:45,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:45,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-03-19 23:29:45,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4397, Invalid=22663, Unknown=0, NotChecked=0, Total=27060 [2022-03-19 23:29:45,847 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:47,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:47,804 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-03-19 23:29:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-19 23:29:47,804 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 125 [2022-03-19 23:29:47,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:47,805 INFO L225 Difference]: With dead ends: 153 [2022-03-19 23:29:47,805 INFO L226 Difference]: Without dead ends: 144 [2022-03-19 23:29:47,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23544 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7525, Invalid=41981, Unknown=0, NotChecked=0, Total=49506 [2022-03-19 23:29:47,807 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 259 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:47,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 75 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:29:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-19 23:29:47,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-03-19 23:29:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 128 states have (on average 1.046875) internal successors, (134), 130 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:29:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 145 transitions. [2022-03-19 23:29:47,824 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 145 transitions. Word has length 125 [2022-03-19 23:29:47,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:47,824 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 145 transitions. [2022-03-19 23:29:47,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 164 states have internal predecessors, (326), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 145 transitions. [2022-03-19 23:29:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 23:29:47,825 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:47,825 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:47,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-19 23:29:48,042 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:48,042 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash 156833077, now seen corresponding path program 46 times [2022-03-19 23:29:48,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:48,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503606307] [2022-03-19 23:29:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:48,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:48,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:48,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:48,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 23:29:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:48,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:48,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503606307] [2022-03-19 23:29:48,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503606307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:48,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663338852] [2022-03-19 23:29:48,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:29:48,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:48,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:48,915 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) [2022-03-19 23:29:48,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-19 23:29:49,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:29:49,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:49,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 23:29:49,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:50,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:29:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:52,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663338852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:29:52,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:29:52,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 57, 57] total 164 [2022-03-19 23:29:52,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171312750] [2022-03-19 23:29:52,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:29:52,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-03-19 23:29:52,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:29:52,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-03-19 23:29:52,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4441, Invalid=22291, Unknown=0, NotChecked=0, Total=26732 [2022-03-19 23:29:52,877 INFO L87 Difference]: Start difference. First operand 140 states and 145 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:29:54,833 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2022-03-19 23:29:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 23:29:54,834 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 127 [2022-03-19 23:29:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:29:54,834 INFO L225 Difference]: With dead ends: 155 [2022-03-19 23:29:54,835 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 23:29:54,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23268 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7537, Invalid=40643, Unknown=0, NotChecked=0, Total=48180 [2022-03-19 23:29:54,838 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 166 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:29:54,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 117 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:29:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 23:29:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2022-03-19 23:29:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 129 states have internal predecessors, (132), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:29:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2022-03-19 23:29:54,855 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 127 [2022-03-19 23:29:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:29:54,855 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2022-03-19 23:29:54,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:29:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2022-03-19 23:29:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 23:29:54,856 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:29:54,856 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:29:54,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-19 23:29:55,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:55,057 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:29:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:29:55,057 INFO L85 PathProgramCache]: Analyzing trace with hash -306128235, now seen corresponding path program 46 times [2022-03-19 23:29:55,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:29:55,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913732408] [2022-03-19 23:29:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:29:55,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:55,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:55,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:29:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:55,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 23:29:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:56,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:56,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913732408] [2022-03-19 23:29:56,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913732408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:56,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377500443] [2022-03-19 23:29:56,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:29:56,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:56,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:56,083 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) [2022-03-19 23:29:56,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-19 23:29:56,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:29:56,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:29:56,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 23:29:56,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:29:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:29:57,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 625 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:00,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377500443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:00,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:00,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 57, 57] total 164 [2022-03-19 23:30:00,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220475702] [2022-03-19 23:30:00,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:00,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-03-19 23:30:00,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:00,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-03-19 23:30:00,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4441, Invalid=22291, Unknown=0, NotChecked=0, Total=26732 [2022-03-19 23:30:00,208 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:02,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:02,177 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-03-19 23:30:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 23:30:02,178 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 127 [2022-03-19 23:30:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:02,178 INFO L225 Difference]: With dead ends: 149 [2022-03-19 23:30:02,179 INFO L226 Difference]: Without dead ends: 139 [2022-03-19 23:30:02,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23119 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7537, Invalid=40643, Unknown=0, NotChecked=0, Total=48180 [2022-03-19 23:30:02,181 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 173 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:02,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 110 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:30:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-19 23:30:02,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-03-19 23:30:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 128 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:30:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-03-19 23:30:02,198 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 127 [2022-03-19 23:30:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:02,198 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-03-19 23:30:02,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-03-19 23:30:02,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 23:30:02,199 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:02,199 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:02,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-19 23:30:02,399 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,SelfDestructingSolverStorable98 [2022-03-19 23:30:02,399 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash 415282327, now seen corresponding path program 47 times [2022-03-19 23:30:02,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:02,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873275339] [2022-03-19 23:30:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:02,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:02,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:02,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:02,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 23:30:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:03,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:03,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873275339] [2022-03-19 23:30:03,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873275339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:03,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036466055] [2022-03-19 23:30:03,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:30:03,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:03,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:03,268 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) [2022-03-19 23:30:03,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-19 23:30:03,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-03-19 23:30:03,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:30:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 23:30:03,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:05,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:07,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036466055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:07,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:07,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 171 [2022-03-19 23:30:07,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525341615] [2022-03-19 23:30:07,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:07,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-03-19 23:30:07,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:07,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-03-19 23:30:07,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=24343, Unknown=0, NotChecked=0, Total=29070 [2022-03-19 23:30:07,712 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:10,025 INFO L93 Difference]: Finished difference Result 162 states and 169 transitions. [2022-03-19 23:30:10,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 23:30:10,026 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 129 [2022-03-19 23:30:10,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:10,026 INFO L225 Difference]: With dead ends: 162 [2022-03-19 23:30:10,026 INFO L226 Difference]: Without dead ends: 151 [2022-03-19 23:30:10,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25329 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8081, Invalid=45049, Unknown=0, NotChecked=0, Total=53130 [2022-03-19 23:30:10,030 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:10,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 112 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:30:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-19 23:30:10,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2022-03-19 23:30:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 131 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:30:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-03-19 23:30:10,047 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 129 [2022-03-19 23:30:10,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:10,048 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-03-19 23:30:10,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:10,048 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-03-19 23:30:10,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 23:30:10,048 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:10,048 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:10,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-19 23:30:10,249 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,SelfDestructingSolverStorable99 [2022-03-19 23:30:10,249 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:10,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:10,249 INFO L85 PathProgramCache]: Analyzing trace with hash 689164115, now seen corresponding path program 47 times [2022-03-19 23:30:10,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:10,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226945655] [2022-03-19 23:30:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:10,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:10,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:10,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:10,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 23:30:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:11,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:11,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226945655] [2022-03-19 23:30:11,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226945655] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:11,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583439190] [2022-03-19 23:30:11,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:30:11,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:11,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:11,330 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) [2022-03-19 23:30:11,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-19 23:30:11,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-03-19 23:30:11,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:30:11,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 23:30:11,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:13,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:15,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583439190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:15,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:15,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 171 [2022-03-19 23:30:15,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98981271] [2022-03-19 23:30:15,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:15,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-03-19 23:30:15,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:15,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-03-19 23:30:15,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=24343, Unknown=0, NotChecked=0, Total=29070 [2022-03-19 23:30:15,560 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:17,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:17,925 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2022-03-19 23:30:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 23:30:17,925 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 129 [2022-03-19 23:30:17,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:17,926 INFO L225 Difference]: With dead ends: 157 [2022-03-19 23:30:17,926 INFO L226 Difference]: Without dead ends: 148 [2022-03-19 23:30:17,928 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25355 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8081, Invalid=45049, Unknown=0, NotChecked=0, Total=53130 [2022-03-19 23:30:17,928 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:17,928 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 155 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:30:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-19 23:30:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2022-03-19 23:30:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 132 states have (on average 1.0454545454545454) internal successors, (138), 134 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:30:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2022-03-19 23:30:17,947 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 129 [2022-03-19 23:30:17,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:17,947 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2022-03-19 23:30:17,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.976608187134503) internal successors, (338), 170 states have internal predecessors, (338), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:17,947 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2022-03-19 23:30:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 23:30:17,948 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:17,948 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:17,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-19 23:30:18,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-19 23:30:18,148 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:18,149 INFO L85 PathProgramCache]: Analyzing trace with hash -865470123, now seen corresponding path program 48 times [2022-03-19 23:30:18,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:18,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642858491] [2022-03-19 23:30:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:18,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:18,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:18,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:18,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 23:30:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:19,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:19,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642858491] [2022-03-19 23:30:19,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642858491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:19,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273118485] [2022-03-19 23:30:19,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:30:19,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:19,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:19,013 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) [2022-03-19 23:30:19,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-19 23:30:19,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-19 23:30:19,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:30:19,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 23:30:19,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:20,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:23,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273118485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:23,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:23,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 59, 59] total 170 [2022-03-19 23:30:23,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447734689] [2022-03-19 23:30:23,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:23,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-03-19 23:30:23,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:23,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-03-19 23:30:23,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4773, Invalid=23957, Unknown=0, NotChecked=0, Total=28730 [2022-03-19 23:30:23,557 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:25,666 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2022-03-19 23:30:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-19 23:30:25,667 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 131 [2022-03-19 23:30:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:25,667 INFO L225 Difference]: With dead ends: 159 [2022-03-19 23:30:25,667 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 23:30:25,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25068 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8095, Invalid=43661, Unknown=0, NotChecked=0, Total=51756 [2022-03-19 23:30:25,670 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:25,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 97 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:30:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 23:30:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2022-03-19 23:30:25,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 133 states have internal predecessors, (136), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:30:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2022-03-19 23:30:25,695 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 131 [2022-03-19 23:30:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:25,695 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2022-03-19 23:30:25,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:25,696 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2022-03-19 23:30:25,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 23:30:25,696 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:25,696 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:25,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-19 23:30:25,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:25,900 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:25,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:25,900 INFO L85 PathProgramCache]: Analyzing trace with hash 884301621, now seen corresponding path program 48 times [2022-03-19 23:30:25,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:25,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614793796] [2022-03-19 23:30:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:25,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:25,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:25,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:26,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 23:30:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:26,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:26,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614793796] [2022-03-19 23:30:26,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614793796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:26,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390524131] [2022-03-19 23:30:26,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:30:26,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:26,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:26,992 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) [2022-03-19 23:30:26,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-19 23:30:27,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-19 23:30:27,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:30:27,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 23:30:27,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:28,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 676 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:31,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390524131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:31,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:31,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 59, 59] total 170 [2022-03-19 23:30:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327389901] [2022-03-19 23:30:31,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:31,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-03-19 23:30:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:31,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-03-19 23:30:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4773, Invalid=23957, Unknown=0, NotChecked=0, Total=28730 [2022-03-19 23:30:31,170 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:33,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:33,137 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2022-03-19 23:30:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-19 23:30:33,137 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 131 [2022-03-19 23:30:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:33,138 INFO L225 Difference]: With dead ends: 153 [2022-03-19 23:30:33,138 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 23:30:33,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24913 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8095, Invalid=43661, Unknown=0, NotChecked=0, Total=51756 [2022-03-19 23:30:33,140 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 174 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:33,140 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 105 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:30:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 23:30:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-03-19 23:30:33,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 132 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:30:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2022-03-19 23:30:33,159 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 131 [2022-03-19 23:30:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:33,159 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2022-03-19 23:30:33,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2022-03-19 23:30:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 23:30:33,159 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:33,160 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:33,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-19 23:30:33,360 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,SelfDestructingSolverStorable102 [2022-03-19 23:30:33,360 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:33,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:33,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1957073207, now seen corresponding path program 49 times [2022-03-19 23:30:33,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:33,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5095827] [2022-03-19 23:30:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:33,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:33,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:33,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:33,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 23:30:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:34,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:34,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5095827] [2022-03-19 23:30:34,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5095827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:34,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954845407] [2022-03-19 23:30:34,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:30:34,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:34,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:34,307 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) [2022-03-19 23:30:34,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-19 23:30:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:34,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 23:30:34,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:36,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:39,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954845407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:39,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:39,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 177 [2022-03-19 23:30:39,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990919365] [2022-03-19 23:30:39,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:39,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-03-19 23:30:39,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:39,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-03-19 23:30:39,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5069, Invalid=26083, Unknown=0, NotChecked=0, Total=31152 [2022-03-19 23:30:39,011 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:41,472 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2022-03-19 23:30:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 23:30:41,483 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-03-19 23:30:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:41,487 INFO L225 Difference]: With dead ends: 166 [2022-03-19 23:30:41,487 INFO L226 Difference]: Without dead ends: 155 [2022-03-19 23:30:41,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27206 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8657, Invalid=48225, Unknown=0, NotChecked=0, Total=56882 [2022-03-19 23:30:41,490 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 213 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:41,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 137 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:30:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-19 23:30:41,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2022-03-19 23:30:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 133 states have (on average 1.037593984962406) internal successors, (138), 135 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:30:41,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2022-03-19 23:30:41,510 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 133 [2022-03-19 23:30:41,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:41,510 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2022-03-19 23:30:41,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:41,510 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2022-03-19 23:30:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 23:30:41,511 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:41,511 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:41,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-19 23:30:41,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-19 23:30:41,717 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:41,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1109494669, now seen corresponding path program 49 times [2022-03-19 23:30:41,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:41,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844217954] [2022-03-19 23:30:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:41,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:41,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:41,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:42,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 23:30:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:42,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:42,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844217954] [2022-03-19 23:30:42,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844217954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:42,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836611959] [2022-03-19 23:30:42,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:30:42,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:42,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:42,885 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) [2022-03-19 23:30:42,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-19 23:30:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 23:30:43,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:44,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:47,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836611959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:47,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:47,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 177 [2022-03-19 23:30:47,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582149929] [2022-03-19 23:30:47,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:47,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-03-19 23:30:47,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:47,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-03-19 23:30:47,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5069, Invalid=26083, Unknown=0, NotChecked=0, Total=31152 [2022-03-19 23:30:47,363 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:49,603 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2022-03-19 23:30:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 23:30:49,603 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-03-19 23:30:49,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:49,604 INFO L225 Difference]: With dead ends: 161 [2022-03-19 23:30:49,604 INFO L226 Difference]: Without dead ends: 152 [2022-03-19 23:30:49,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27233 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8657, Invalid=48225, Unknown=0, NotChecked=0, Total=56882 [2022-03-19 23:30:49,607 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 198 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:49,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 90 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:30:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-19 23:30:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2022-03-19 23:30:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 136 states have (on average 1.0441176470588236) internal successors, (142), 138 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:30:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2022-03-19 23:30:49,627 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 133 [2022-03-19 23:30:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:49,627 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2022-03-19 23:30:49,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.9774011299435028) internal successors, (350), 176 states have internal predecessors, (350), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2022-03-19 23:30:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 23:30:49,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:49,628 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:49,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-19 23:30:49,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:49,828 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1495258741, now seen corresponding path program 50 times [2022-03-19 23:30:49,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:49,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43466109] [2022-03-19 23:30:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:49,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:49,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:49,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:50,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 23:30:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:50,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:50,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43466109] [2022-03-19 23:30:50,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43466109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:50,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179379033] [2022-03-19 23:30:50,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:30:50,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:50,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:50,760 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) [2022-03-19 23:30:50,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-19 23:30:51,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:30:51,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:30:51,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-19 23:30:51,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:52,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:55,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179379033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:55,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:55,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 61, 61] total 176 [2022-03-19 23:30:55,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392558212] [2022-03-19 23:30:55,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:55,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-03-19 23:30:55,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:55,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-03-19 23:30:55,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5117, Invalid=25683, Unknown=0, NotChecked=0, Total=30800 [2022-03-19 23:30:55,354 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:57,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:57,621 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2022-03-19 23:30:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 23:30:57,621 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 135 [2022-03-19 23:30:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:57,622 INFO L225 Difference]: With dead ends: 163 [2022-03-19 23:30:57,622 INFO L226 Difference]: Without dead ends: 151 [2022-03-19 23:30:57,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26935 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8673, Invalid=46787, Unknown=0, NotChecked=0, Total=55460 [2022-03-19 23:30:57,624 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 195 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:57,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 127 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:30:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-19 23:30:57,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2022-03-19 23:30:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 135 states have (on average 1.037037037037037) internal successors, (140), 137 states have internal predecessors, (140), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:30:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2022-03-19 23:30:57,644 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 135 [2022-03-19 23:30:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:57,644 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2022-03-19 23:30:57,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:30:57,644 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2022-03-19 23:30:57,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 23:30:57,645 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:57,645 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:57,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-19 23:30:57,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:57,845 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:57,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:57,846 INFO L85 PathProgramCache]: Analyzing trace with hash -622281515, now seen corresponding path program 50 times [2022-03-19 23:30:57,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:57,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708322393] [2022-03-19 23:30:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:57,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:57,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:57,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:30:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:58,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 23:30:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:30:58,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:58,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708322393] [2022-03-19 23:30:58,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708322393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:58,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941983245] [2022-03-19 23:30:58,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:30:58,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:58,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:58,979 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) [2022-03-19 23:30:58,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-19 23:30:59,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:30:59,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:30:59,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-19 23:30:59,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:00,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 729 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:03,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941983245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:03,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:03,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 61, 61] total 176 [2022-03-19 23:31:03,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771116210] [2022-03-19 23:31:03,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:03,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-03-19 23:31:03,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:03,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-03-19 23:31:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5117, Invalid=25683, Unknown=0, NotChecked=0, Total=30800 [2022-03-19 23:31:03,260 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:05,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:05,475 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2022-03-19 23:31:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 23:31:05,476 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 135 [2022-03-19 23:31:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:05,476 INFO L225 Difference]: With dead ends: 157 [2022-03-19 23:31:05,476 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 23:31:05,480 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26774 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8673, Invalid=46787, Unknown=0, NotChecked=0, Total=55460 [2022-03-19 23:31:05,480 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 200 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:05,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 125 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:31:05,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 23:31:05,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-03-19 23:31:05,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 136 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:31:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2022-03-19 23:31:05,500 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 135 [2022-03-19 23:31:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:05,500 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2022-03-19 23:31:05,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2022-03-19 23:31:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-19 23:31:05,500 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:05,500 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:05,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:05,715 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,SelfDestructingSolverStorable106 [2022-03-19 23:31:05,715 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:05,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1534658263, now seen corresponding path program 51 times [2022-03-19 23:31:05,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:05,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129465464] [2022-03-19 23:31:05,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:05,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:05,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:05,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:06,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 23:31:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:06,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:06,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129465464] [2022-03-19 23:31:06,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129465464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:06,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915418816] [2022-03-19 23:31:06,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:31:06,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:06,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:06,671 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) [2022-03-19 23:31:06,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-19 23:31:07,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-19 23:31:07,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:07,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 23:31:07,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:08,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:11,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915418816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:11,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:11,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 183 [2022-03-19 23:31:11,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454261101] [2022-03-19 23:31:11,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:11,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-03-19 23:31:11,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:11,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-03-19 23:31:11,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5423, Invalid=27883, Unknown=0, NotChecked=0, Total=33306 [2022-03-19 23:31:11,684 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:14,250 INFO L93 Difference]: Finished difference Result 170 states and 177 transitions. [2022-03-19 23:31:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 23:31:14,251 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 137 [2022-03-19 23:31:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:14,251 INFO L225 Difference]: With dead ends: 170 [2022-03-19 23:31:14,251 INFO L226 Difference]: Without dead ends: 159 [2022-03-19 23:31:14,255 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29150 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9253, Invalid=51509, Unknown=0, NotChecked=0, Total=60762 [2022-03-19 23:31:14,255 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 234 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:14,255 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 142 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:31:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-19 23:31:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 149. [2022-03-19 23:31:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 139 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:31:14,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2022-03-19 23:31:14,276 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 137 [2022-03-19 23:31:14,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:14,276 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2022-03-19 23:31:14,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2022-03-19 23:31:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-19 23:31:14,277 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:14,277 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:14,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-19 23:31:14,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:14,477 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:14,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:14,478 INFO L85 PathProgramCache]: Analyzing trace with hash 931500691, now seen corresponding path program 51 times [2022-03-19 23:31:14,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:14,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607338609] [2022-03-19 23:31:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:14,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:14,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:14,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:14,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 23:31:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:15,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607338609] [2022-03-19 23:31:15,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607338609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158793694] [2022-03-19 23:31:15,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:31:15,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:15,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:15,664 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) [2022-03-19 23:31:15,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-19 23:31:16,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-19 23:31:16,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:16,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 23:31:16,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:17,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 729 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:20,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158793694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:20,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:20,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 183 [2022-03-19 23:31:20,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385209876] [2022-03-19 23:31:20,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:20,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-03-19 23:31:20,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:20,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-03-19 23:31:20,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5423, Invalid=27883, Unknown=0, NotChecked=0, Total=33306 [2022-03-19 23:31:20,281 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:22,666 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2022-03-19 23:31:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 23:31:22,667 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 137 [2022-03-19 23:31:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:22,667 INFO L225 Difference]: With dead ends: 165 [2022-03-19 23:31:22,667 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 23:31:22,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29178 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9253, Invalid=51509, Unknown=0, NotChecked=0, Total=60762 [2022-03-19 23:31:22,671 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 262 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:22,671 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 110 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:31:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 23:31:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2022-03-19 23:31:22,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 140 states have (on average 1.042857142857143) internal successors, (146), 142 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:31:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 157 transitions. [2022-03-19 23:31:22,706 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 157 transitions. Word has length 137 [2022-03-19 23:31:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:22,706 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 157 transitions. [2022-03-19 23:31:22,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.9781420765027322) internal successors, (362), 182 states have internal predecessors, (362), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 157 transitions. [2022-03-19 23:31:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-19 23:31:22,707 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:22,708 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:22,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:22,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:22,923 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash 91745429, now seen corresponding path program 52 times [2022-03-19 23:31:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:22,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028574979] [2022-03-19 23:31:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:22,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:22,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:23,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 23:31:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:23,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:23,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028574979] [2022-03-19 23:31:23,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028574979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:23,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397641590] [2022-03-19 23:31:23,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:31:23,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:23,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:23,866 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) [2022-03-19 23:31:23,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-19 23:31:24,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:31:24,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:24,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-19 23:31:24,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:25,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:28,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397641590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:28,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:28,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 63, 63] total 182 [2022-03-19 23:31:28,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117935604] [2022-03-19 23:31:28,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:28,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-03-19 23:31:28,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:28,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-03-19 23:31:28,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5473, Invalid=27469, Unknown=0, NotChecked=0, Total=32942 [2022-03-19 23:31:28,763 INFO L87 Difference]: Start difference. First operand 152 states and 157 transitions. Second operand has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:31,029 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2022-03-19 23:31:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 23:31:31,030 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 139 [2022-03-19 23:31:31,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:31,030 INFO L225 Difference]: With dead ends: 167 [2022-03-19 23:31:31,030 INFO L226 Difference]: Without dead ends: 155 [2022-03-19 23:31:31,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28869 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9271, Invalid=50021, Unknown=0, NotChecked=0, Total=59292 [2022-03-19 23:31:31,033 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 179 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:31,033 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 127 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:31:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-19 23:31:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-03-19 23:31:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 141 states have internal predecessors, (144), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:31:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2022-03-19 23:31:31,061 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 139 [2022-03-19 23:31:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:31,062 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2022-03-19 23:31:31,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2022-03-19 23:31:31,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-19 23:31:31,062 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:31,063 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:31,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-19 23:31:31,263 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,SelfDestructingSolverStorable109 [2022-03-19 23:31:31,263 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash 929051509, now seen corresponding path program 52 times [2022-03-19 23:31:31,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:31,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724181441] [2022-03-19 23:31:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:31,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:31,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:31,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:31,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 23:31:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:32,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:32,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724181441] [2022-03-19 23:31:32,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724181441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:32,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415642404] [2022-03-19 23:31:32,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:31:32,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:32,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:32,466 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) [2022-03-19 23:31:32,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-19 23:31:32,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:31:32,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:32,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-19 23:31:32,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 729 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:34,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 784 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:37,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415642404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:37,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:37,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 63, 63] total 182 [2022-03-19 23:31:37,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653270428] [2022-03-19 23:31:37,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:37,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-03-19 23:31:37,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-03-19 23:31:37,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5473, Invalid=27469, Unknown=0, NotChecked=0, Total=32942 [2022-03-19 23:31:37,066 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:39,506 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-03-19 23:31:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 23:31:39,506 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 139 [2022-03-19 23:31:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:39,507 INFO L225 Difference]: With dead ends: 161 [2022-03-19 23:31:39,507 INFO L226 Difference]: Without dead ends: 151 [2022-03-19 23:31:39,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28702 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9271, Invalid=50021, Unknown=0, NotChecked=0, Total=59292 [2022-03-19 23:31:39,510 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 217 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:39,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 135 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:31:39,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-19 23:31:39,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-03-19 23:31:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 140 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:31:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-03-19 23:31:39,532 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 139 [2022-03-19 23:31:39,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:39,532 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-03-19 23:31:39,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.0) internal successors, (364), 181 states have internal predecessors, (364), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-03-19 23:31:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 23:31:39,533 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:39,533 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:39,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-19 23:31:39,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:39,735 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:39,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:39,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2012042615, now seen corresponding path program 53 times [2022-03-19 23:31:39,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:39,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772772880] [2022-03-19 23:31:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:39,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:39,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:39,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:40,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 23:31:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:40,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:40,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772772880] [2022-03-19 23:31:40,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772772880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:40,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269545906] [2022-03-19 23:31:40,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:31:40,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:40,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:40,773 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) [2022-03-19 23:31:40,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-19 23:31:41,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-03-19 23:31:41,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:41,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 23:31:41,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:42,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:45,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269545906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:45,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:45,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 189 [2022-03-19 23:31:45,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660208795] [2022-03-19 23:31:45,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:45,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-03-19 23:31:45,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:45,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-03-19 23:31:45,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5789, Invalid=29743, Unknown=0, NotChecked=0, Total=35532 [2022-03-19 23:31:45,955 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:48,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:48,715 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2022-03-19 23:31:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 23:31:48,715 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 141 [2022-03-19 23:31:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:48,716 INFO L225 Difference]: With dead ends: 174 [2022-03-19 23:31:48,716 INFO L226 Difference]: Without dead ends: 163 [2022-03-19 23:31:48,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31161 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9869, Invalid=54901, Unknown=0, NotChecked=0, Total=64770 [2022-03-19 23:31:48,721 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 233 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:48,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 122 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 23:31:48,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-19 23:31:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 153. [2022-03-19 23:31:48,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.0354609929078014) internal successors, (146), 143 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:31:48,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2022-03-19 23:31:48,754 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 141 [2022-03-19 23:31:48,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:48,754 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2022-03-19 23:31:48,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2022-03-19 23:31:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 23:31:48,754 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:48,755 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:48,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-19 23:31:48,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-19 23:31:48,955 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:48,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:48,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2075760205, now seen corresponding path program 53 times [2022-03-19 23:31:48,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:48,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633843329] [2022-03-19 23:31:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:48,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:48,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:48,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:49,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 23:31:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:50,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:50,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633843329] [2022-03-19 23:31:50,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633843329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:50,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126399608] [2022-03-19 23:31:50,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:31:50,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:50,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:50,256 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) [2022-03-19 23:31:50,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-19 23:31:50,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-03-19 23:31:50,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:50,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 23:31:50,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:52,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 784 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:55,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126399608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:55,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:55,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 189 [2022-03-19 23:31:55,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484993152] [2022-03-19 23:31:55,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:55,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-03-19 23:31:55,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:55,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-03-19 23:31:55,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5789, Invalid=29743, Unknown=0, NotChecked=0, Total=35532 [2022-03-19 23:31:55,217 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:57,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:57,801 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2022-03-19 23:31:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 23:31:57,801 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 141 [2022-03-19 23:31:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:57,802 INFO L225 Difference]: With dead ends: 169 [2022-03-19 23:31:57,802 INFO L226 Difference]: Without dead ends: 160 [2022-03-19 23:31:57,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31190 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9869, Invalid=54901, Unknown=0, NotChecked=0, Total=64770 [2022-03-19 23:31:57,805 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 221 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:57,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 105 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:31:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-19 23:31:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2022-03-19 23:31:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 144 states have (on average 1.0416666666666667) internal successors, (150), 146 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:31:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2022-03-19 23:31:57,827 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 141 [2022-03-19 23:31:57,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:57,828 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2022-03-19 23:31:57,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.9788359788359788) internal successors, (374), 188 states have internal predecessors, (374), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:31:57,828 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2022-03-19 23:31:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 23:31:57,828 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:31:57,828 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:31:57,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-19 23:31:58,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:58,029 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:31:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:31:58,029 INFO L85 PathProgramCache]: Analyzing trace with hash 627014581, now seen corresponding path program 54 times [2022-03-19 23:31:58,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:31:58,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125358053] [2022-03-19 23:31:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:31:58,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:58,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:31:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:58,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:31:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:58,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 23:31:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:31:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:31:59,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:31:59,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125358053] [2022-03-19 23:31:59,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125358053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:31:59,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559667093] [2022-03-19 23:31:59,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:31:59,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:31:59,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:31:59,045 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:31:59,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-19 23:31:59,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-03-19 23:31:59,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:31:59,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 23:31:59,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:01,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:04,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559667093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:04,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:32:04,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 65, 65] total 188 [2022-03-19 23:32:04,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560049507] [2022-03-19 23:32:04,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:04,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-03-19 23:32:04,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:04,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-03-19 23:32:04,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5841, Invalid=29315, Unknown=0, NotChecked=0, Total=35156 [2022-03-19 23:32:04,320 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:06,718 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2022-03-19 23:32:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 23:32:06,718 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2022-03-19 23:32:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:06,719 INFO L225 Difference]: With dead ends: 171 [2022-03-19 23:32:06,719 INFO L226 Difference]: Without dead ends: 159 [2022-03-19 23:32:06,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30870 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9889, Invalid=53363, Unknown=0, NotChecked=0, Total=63252 [2022-03-19 23:32:06,723 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:06,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 92 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:32:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-19 23:32:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2022-03-19 23:32:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 143 states have (on average 1.034965034965035) internal successors, (148), 145 states have internal predecessors, (148), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:32:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2022-03-19 23:32:06,746 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 143 [2022-03-19 23:32:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:06,746 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2022-03-19 23:32:06,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2022-03-19 23:32:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 23:32:06,746 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:06,746 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:06,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:06,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-19 23:32:06,966 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:06,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2098266901, now seen corresponding path program 54 times [2022-03-19 23:32:06,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:06,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247794805] [2022-03-19 23:32:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:06,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:07,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:32:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:07,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:32:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:07,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 23:32:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:08,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:08,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247794805] [2022-03-19 23:32:08,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247794805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:08,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482107313] [2022-03-19 23:32:08,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:32:08,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:08,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:08,247 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:32:08,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-19 23:32:08,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-03-19 23:32:08,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:32:08,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 23:32:08,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 784 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:10,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 841 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:13,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482107313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:13,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:32:13,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 65, 65] total 188 [2022-03-19 23:32:13,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550262572] [2022-03-19 23:32:13,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:13,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-03-19 23:32:13,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:13,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-03-19 23:32:13,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5841, Invalid=29315, Unknown=0, NotChecked=0, Total=35156 [2022-03-19 23:32:13,073 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:15,461 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2022-03-19 23:32:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 23:32:15,462 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2022-03-19 23:32:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:15,462 INFO L225 Difference]: With dead ends: 165 [2022-03-19 23:32:15,462 INFO L226 Difference]: Without dead ends: 155 [2022-03-19 23:32:15,465 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30697 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9889, Invalid=53363, Unknown=0, NotChecked=0, Total=63252 [2022-03-19 23:32:15,465 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:15,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 120 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:32:15,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-19 23:32:15,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-03-19 23:32:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.028169014084507) internal successors, (146), 144 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:32:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2022-03-19 23:32:15,487 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 143 [2022-03-19 23:32:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:15,487 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2022-03-19 23:32:15,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.0) internal successors, (376), 187 states have internal predecessors, (376), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2022-03-19 23:32:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-19 23:32:15,488 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:15,488 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:15,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:15,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-19 23:32:15,689 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:15,689 INFO L85 PathProgramCache]: Analyzing trace with hash 346602775, now seen corresponding path program 55 times [2022-03-19 23:32:15,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:15,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031972166] [2022-03-19 23:32:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:15,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:15,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:32:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:15,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:32:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:16,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 23:32:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:16,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:16,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031972166] [2022-03-19 23:32:16,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031972166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:16,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513810512] [2022-03-19 23:32:16,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:32:16,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:16,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:16,732 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:32:16,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-19 23:32:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:17,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 23:32:17,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:19,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:22,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513810512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:22,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:32:22,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 195 [2022-03-19 23:32:22,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596914487] [2022-03-19 23:32:22,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:22,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-03-19 23:32:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:22,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-03-19 23:32:22,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6167, Invalid=31663, Unknown=0, NotChecked=0, Total=37830 [2022-03-19 23:32:22,183 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:24,872 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2022-03-19 23:32:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-19 23:32:24,872 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2022-03-19 23:32:24,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:24,873 INFO L225 Difference]: With dead ends: 178 [2022-03-19 23:32:24,873 INFO L226 Difference]: Without dead ends: 167 [2022-03-19 23:32:24,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33239 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=10505, Invalid=58401, Unknown=0, NotChecked=0, Total=68906 [2022-03-19 23:32:24,877 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 280 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:24,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 107 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:32:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-19 23:32:24,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 157. [2022-03-19 23:32:24,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 147 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:32:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2022-03-19 23:32:24,919 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 145 [2022-03-19 23:32:24,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:24,919 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2022-03-19 23:32:24,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:24,919 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2022-03-19 23:32:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-19 23:32:24,919 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:24,919 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:24,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-19 23:32:25,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-19 23:32:25,120 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1884174803, now seen corresponding path program 55 times [2022-03-19 23:32:25,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:25,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261280742] [2022-03-19 23:32:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:25,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:25,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:32:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:25,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:32:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:25,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 23:32:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:26,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:26,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261280742] [2022-03-19 23:32:26,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261280742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:26,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708073935] [2022-03-19 23:32:26,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:32:26,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:26,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:26,442 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:32:26,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-19 23:32:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:26,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 23:32:26,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:28,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 841 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:31,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708073935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:31,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:32:31,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 195 [2022-03-19 23:32:31,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180178564] [2022-03-19 23:32:31,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:31,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-03-19 23:32:31,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-03-19 23:32:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6167, Invalid=31663, Unknown=0, NotChecked=0, Total=37830 [2022-03-19 23:32:31,626 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:34,243 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2022-03-19 23:32:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-19 23:32:34,244 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2022-03-19 23:32:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:34,244 INFO L225 Difference]: With dead ends: 173 [2022-03-19 23:32:34,244 INFO L226 Difference]: Without dead ends: 164 [2022-03-19 23:32:34,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33269 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=10505, Invalid=58401, Unknown=0, NotChecked=0, Total=68906 [2022-03-19 23:32:34,248 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 257 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:34,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 95 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:32:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-19 23:32:34,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-03-19 23:32:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 150 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:32:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 165 transitions. [2022-03-19 23:32:34,272 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 165 transitions. Word has length 145 [2022-03-19 23:32:34,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:34,272 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 165 transitions. [2022-03-19 23:32:34,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 194 states have internal predecessors, (386), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 165 transitions. [2022-03-19 23:32:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-19 23:32:34,272 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:34,272 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:34,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:34,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-19 23:32:34,473 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash 783533013, now seen corresponding path program 56 times [2022-03-19 23:32:34,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:34,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958443829] [2022-03-19 23:32:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:34,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:34,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:32:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:34,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:32:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:34,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 23:32:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:35,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:35,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958443829] [2022-03-19 23:32:35,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958443829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:35,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232542415] [2022-03-19 23:32:35,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:32:35,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:35,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:35,541 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:32:35,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-19 23:32:35,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:32:35,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:32:35,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-19 23:32:35,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:37,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:40,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232542415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:40,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:32:40,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 67, 67] total 194 [2022-03-19 23:32:40,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159203207] [2022-03-19 23:32:40,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:40,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-03-19 23:32:40,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-03-19 23:32:40,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6221, Invalid=31221, Unknown=0, NotChecked=0, Total=37442 [2022-03-19 23:32:40,837 INFO L87 Difference]: Start difference. First operand 160 states and 165 transitions. Second operand has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:43,356 INFO L93 Difference]: Finished difference Result 175 states and 180 transitions. [2022-03-19 23:32:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 23:32:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 147 [2022-03-19 23:32:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:43,357 INFO L225 Difference]: With dead ends: 175 [2022-03-19 23:32:43,357 INFO L226 Difference]: Without dead ends: 163 [2022-03-19 23:32:43,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32938 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10527, Invalid=56813, Unknown=0, NotChecked=0, Total=67340 [2022-03-19 23:32:43,360 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 178 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:43,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 122 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:32:43,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-19 23:32:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2022-03-19 23:32:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 147 states have (on average 1.034013605442177) internal successors, (152), 149 states have internal predecessors, (152), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:32:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2022-03-19 23:32:43,384 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 147 [2022-03-19 23:32:43,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:43,384 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2022-03-19 23:32:43,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:43,385 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2022-03-19 23:32:43,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-19 23:32:43,385 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:43,385 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:43,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:43,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:43,586 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:43,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:43,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1591765941, now seen corresponding path program 56 times [2022-03-19 23:32:43,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:43,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373243433] [2022-03-19 23:32:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:43,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:43,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:32:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:43,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:32:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:44,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 23:32:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:44,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:44,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373243433] [2022-03-19 23:32:44,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373243433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:44,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935555919] [2022-03-19 23:32:44,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:32:44,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:44,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:44,957 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:32:44,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-19 23:32:45,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:32:45,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:32:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-19 23:32:45,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 841 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:47,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 900 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:49,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935555919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:49,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:32:49,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 67, 67] total 194 [2022-03-19 23:32:49,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323456711] [2022-03-19 23:32:49,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:49,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-03-19 23:32:49,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-03-19 23:32:49,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6221, Invalid=31221, Unknown=0, NotChecked=0, Total=37442 [2022-03-19 23:32:49,954 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:32:52,419 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2022-03-19 23:32:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 23:32:52,419 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 147 [2022-03-19 23:32:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:32:52,433 INFO L225 Difference]: With dead ends: 169 [2022-03-19 23:32:52,434 INFO L226 Difference]: Without dead ends: 159 [2022-03-19 23:32:52,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32759 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10527, Invalid=56813, Unknown=0, NotChecked=0, Total=67340 [2022-03-19 23:32:52,436 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 266 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:32:52,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 95 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:32:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-19 23:32:52,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-03-19 23:32:52,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 148 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:32:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2022-03-19 23:32:52,461 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 147 [2022-03-19 23:32:52,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:32:52,461 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2022-03-19 23:32:52,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0) internal successors, (388), 193 states have internal predecessors, (388), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:32:52,461 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2022-03-19 23:32:52,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 23:32:52,461 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:52,462 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:52,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-19 23:32:52,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:52,662 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:52,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:52,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1069515337, now seen corresponding path program 57 times [2022-03-19 23:32:52,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:52,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951621708] [2022-03-19 23:32:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:52,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:32:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:52,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:32:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:52,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:32:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:53,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 23:32:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:32:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:53,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:32:53,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951621708] [2022-03-19 23:32:53,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951621708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:32:53,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451458327] [2022-03-19 23:32:53,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:32:53,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:32:53,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:32:53,795 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:32:53,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-19 23:32:54,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-03-19 23:32:54,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:32:54,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 23:32:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:32:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:56,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:32:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:32:59,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451458327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:32:59,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:32:59,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 201 [2022-03-19 23:32:59,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599391835] [2022-03-19 23:32:59,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:32:59,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-03-19 23:32:59,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:32:59,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-03-19 23:32:59,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=33643, Unknown=0, NotChecked=0, Total=40200 [2022-03-19 23:32:59,653 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:33:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:02,386 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2022-03-19 23:33:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 23:33:02,386 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 149 [2022-03-19 23:33:02,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:02,387 INFO L225 Difference]: With dead ends: 182 [2022-03-19 23:33:02,387 INFO L226 Difference]: Without dead ends: 171 [2022-03-19 23:33:02,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35384 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=11161, Invalid=62009, Unknown=0, NotChecked=0, Total=73170 [2022-03-19 23:33:02,390 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 252 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:02,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 87 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:33:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-19 23:33:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2022-03-19 23:33:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 151 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:33:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-03-19 23:33:02,415 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 149 [2022-03-19 23:33:02,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:02,415 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-03-19 23:33:02,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:33:02,415 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-03-19 23:33:02,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 23:33:02,416 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:02,416 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:02,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-19 23:33:02,617 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:02,617 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:02,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:02,617 INFO L85 PathProgramCache]: Analyzing trace with hash -910540045, now seen corresponding path program 57 times [2022-03-19 23:33:02,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:02,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868914682] [2022-03-19 23:33:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:02,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:02,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:02,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:03,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 23:33:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:04,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:04,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868914682] [2022-03-19 23:33:04,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868914682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:04,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104230305] [2022-03-19 23:33:04,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:33:04,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:04,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:04,032 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:04,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-19 23:33:04,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-03-19 23:33:04,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:04,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 23:33:04,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:06,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 900 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:09,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104230305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:09,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:09,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 201 [2022-03-19 23:33:09,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913796620] [2022-03-19 23:33:09,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:09,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-03-19 23:33:09,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:09,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-03-19 23:33:09,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=33643, Unknown=0, NotChecked=0, Total=40200 [2022-03-19 23:33:09,434 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:33:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:12,148 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2022-03-19 23:33:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 23:33:12,148 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 149 [2022-03-19 23:33:12,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:12,149 INFO L225 Difference]: With dead ends: 177 [2022-03-19 23:33:12,149 INFO L226 Difference]: Without dead ends: 168 [2022-03-19 23:33:12,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35415 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=11161, Invalid=62009, Unknown=0, NotChecked=0, Total=73170 [2022-03-19 23:33:12,153 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 265 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:12,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 80 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:33:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-19 23:33:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2022-03-19 23:33:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.0394736842105263) internal successors, (158), 154 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:33:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 169 transitions. [2022-03-19 23:33:12,180 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 169 transitions. Word has length 149 [2022-03-19 23:33:12,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:12,180 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 169 transitions. [2022-03-19 23:33:12,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.9800995024875623) internal successors, (398), 200 states have internal predecessors, (398), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:33:12,180 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 169 transitions. [2022-03-19 23:33:12,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 23:33:12,181 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:12,181 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:12,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-19 23:33:12,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:12,381 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:12,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:12,382 INFO L85 PathProgramCache]: Analyzing trace with hash -582875915, now seen corresponding path program 58 times [2022-03-19 23:33:12,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:12,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324789069] [2022-03-19 23:33:12,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:12,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:12,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:12,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:12,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 23:33:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:13,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:13,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324789069] [2022-03-19 23:33:13,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324789069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:13,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227062851] [2022-03-19 23:33:13,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:33:13,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:13,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:13,499 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:13,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-19 23:33:13,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:33:13,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:13,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-19 23:33:13,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:15,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:19,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227062851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:19,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:19,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 69, 69] total 200 [2022-03-19 23:33:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386528790] [2022-03-19 23:33:19,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:19,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-03-19 23:33:19,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-03-19 23:33:19,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6613, Invalid=33187, Unknown=0, NotChecked=0, Total=39800 [2022-03-19 23:33:19,047 INFO L87 Difference]: Start difference. First operand 164 states and 169 transitions. Second operand has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:33:21,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:21,542 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2022-03-19 23:33:21,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-19 23:33:21,542 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 151 [2022-03-19 23:33:21,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:21,543 INFO L225 Difference]: With dead ends: 179 [2022-03-19 23:33:21,543 INFO L226 Difference]: Without dead ends: 167 [2022-03-19 23:33:21,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35073 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=11185, Invalid=60371, Unknown=0, NotChecked=0, Total=71556 [2022-03-19 23:33:21,546 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 198 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:21,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 82 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:33:21,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-19 23:33:21,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2022-03-19 23:33:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 151 states have (on average 1.033112582781457) internal successors, (156), 153 states have internal predecessors, (156), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:33:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2022-03-19 23:33:21,571 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 151 [2022-03-19 23:33:21,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:21,572 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2022-03-19 23:33:21,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:33:21,572 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2022-03-19 23:33:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 23:33:21,572 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:21,572 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:21,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-19 23:33:21,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:21,773 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:21,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:21,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1281118891, now seen corresponding path program 58 times [2022-03-19 23:33:21,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:21,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983346114] [2022-03-19 23:33:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:21,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:21,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:21,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:22,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 23:33:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:23,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:23,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983346114] [2022-03-19 23:33:23,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983346114] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:23,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680136101] [2022-03-19 23:33:23,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:33:23,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:23,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:23,180 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:23,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-19 23:33:23,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:33:23,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:23,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-19 23:33:23,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 900 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:25,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 961 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:28,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680136101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:28,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:28,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 69, 69] total 200 [2022-03-19 23:33:28,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223890235] [2022-03-19 23:33:28,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:28,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-03-19 23:33:28,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:28,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-03-19 23:33:28,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6613, Invalid=33187, Unknown=0, NotChecked=0, Total=39800 [2022-03-19 23:33:28,517 INFO L87 Difference]: Start difference. First operand 163 states and 167 transitions. Second operand has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:33:31,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:31,110 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2022-03-19 23:33:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-19 23:33:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 151 [2022-03-19 23:33:31,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:31,111 INFO L225 Difference]: With dead ends: 173 [2022-03-19 23:33:31,111 INFO L226 Difference]: Without dead ends: 163 [2022-03-19 23:33:31,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34888 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=11185, Invalid=60371, Unknown=0, NotChecked=0, Total=71556 [2022-03-19 23:33:31,114 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 232 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:31,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 110 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:33:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-19 23:33:31,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-03-19 23:33:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 152 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:33:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2022-03-19 23:33:31,139 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 151 [2022-03-19 23:33:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:31,139 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2022-03-19 23:33:31,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.0) internal successors, (400), 199 states have internal predecessors, (400), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:33:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2022-03-19 23:33:31,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-19 23:33:31,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:31,140 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:31,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-19 23:33:31,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-19 23:33:31,340 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:31,341 INFO L85 PathProgramCache]: Analyzing trace with hash -247867561, now seen corresponding path program 59 times [2022-03-19 23:33:31,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:31,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929966490] [2022-03-19 23:33:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:31,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:31,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:31,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:31,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 23:33:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:32,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:32,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929966490] [2022-03-19 23:33:32,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929966490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:32,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588556684] [2022-03-19 23:33:32,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:33:32,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:32,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:32,495 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:32,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-19 23:33:32,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-03-19 23:33:32,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:32,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 23:33:32,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:35,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:38,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588556684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:38,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:38,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 207 [2022-03-19 23:33:38,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671709254] [2022-03-19 23:33:38,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:38,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2022-03-19 23:33:38,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:38,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2022-03-19 23:33:38,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6959, Invalid=35683, Unknown=0, NotChecked=0, Total=42642 [2022-03-19 23:33:38,533 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:33:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:41,503 INFO L93 Difference]: Finished difference Result 186 states and 193 transitions. [2022-03-19 23:33:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 23:33:41,511 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 153 [2022-03-19 23:33:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:41,512 INFO L225 Difference]: With dead ends: 186 [2022-03-19 23:33:41,512 INFO L226 Difference]: Without dead ends: 175 [2022-03-19 23:33:41,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37596 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11837, Invalid=65725, Unknown=0, NotChecked=0, Total=77562 [2022-03-19 23:33:41,515 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 250 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:41,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 97 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:33:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-19 23:33:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2022-03-19 23:33:41,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 155 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:33:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2022-03-19 23:33:41,542 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 153 [2022-03-19 23:33:41,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:41,542 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2022-03-19 23:33:41,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:33:41,542 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2022-03-19 23:33:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-19 23:33:41,542 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:41,542 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:41,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-19 23:33:41,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-19 23:33:41,762 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:41,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2070428397, now seen corresponding path program 59 times [2022-03-19 23:33:41,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:41,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128347738] [2022-03-19 23:33:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:41,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:41,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:41,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:42,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 23:33:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:43,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:43,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128347738] [2022-03-19 23:33:43,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128347738] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:43,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051569338] [2022-03-19 23:33:43,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:33:43,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:43,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:43,213 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:43,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-19 23:33:43,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-03-19 23:33:43,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:43,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 23:33:43,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:45,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 961 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:48,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051569338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:48,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:48,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 207 [2022-03-19 23:33:48,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347036699] [2022-03-19 23:33:48,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:48,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2022-03-19 23:33:48,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:48,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2022-03-19 23:33:48,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6959, Invalid=35683, Unknown=0, NotChecked=0, Total=42642 [2022-03-19 23:33:48,951 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:33:51,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:33:51,965 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2022-03-19 23:33:51,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 23:33:51,966 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 153 [2022-03-19 23:33:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:33:51,966 INFO L225 Difference]: With dead ends: 181 [2022-03-19 23:33:51,967 INFO L226 Difference]: Without dead ends: 172 [2022-03-19 23:33:51,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37628 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11837, Invalid=65725, Unknown=0, NotChecked=0, Total=77562 [2022-03-19 23:33:51,970 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 321 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:33:51,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 120 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:33:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-19 23:33:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2022-03-19 23:33:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.0384615384615385) internal successors, (162), 158 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:33:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2022-03-19 23:33:51,997 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 153 [2022-03-19 23:33:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:33:51,997 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2022-03-19 23:33:51,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.9806763285024154) internal successors, (410), 206 states have internal predecessors, (410), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:33:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2022-03-19 23:33:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 23:33:51,998 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:33:51,998 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:33:52,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-19 23:33:52,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-19 23:33:52,207 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:33:52,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:33:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1455914773, now seen corresponding path program 60 times [2022-03-19 23:33:52,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:33:52,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594619026] [2022-03-19 23:33:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:33:52,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:33:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:52,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:33:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:52,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:33:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:52,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 23:33:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:33:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:53,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:33:53,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594619026] [2022-03-19 23:33:53,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594619026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:33:53,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165210627] [2022-03-19 23:33:53,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:33:53,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:33:53,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:33:53,349 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:33:53,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-19 23:33:53,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-03-19 23:33:53,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:33:53,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-19 23:33:53,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:33:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:55,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:33:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:33:59,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165210627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:33:59,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:33:59,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 71, 71] total 206 [2022-03-19 23:33:59,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696382587] [2022-03-19 23:33:59,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:33:59,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-03-19 23:33:59,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:33:59,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-03-19 23:33:59,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7017, Invalid=35213, Unknown=0, NotChecked=0, Total=42230 [2022-03-19 23:33:59,278 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:01,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:34:01,977 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2022-03-19 23:34:01,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 23:34:01,978 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 155 [2022-03-19 23:34:01,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:34:01,978 INFO L225 Difference]: With dead ends: 183 [2022-03-19 23:34:01,978 INFO L226 Difference]: Without dead ends: 171 [2022-03-19 23:34:01,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37275 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11863, Invalid=64037, Unknown=0, NotChecked=0, Total=75900 [2022-03-19 23:34:01,981 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 301 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:34:01,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 97 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:34:01,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-19 23:34:02,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2022-03-19 23:34:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 155 states have (on average 1.032258064516129) internal successors, (160), 157 states have internal predecessors, (160), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:34:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 171 transitions. [2022-03-19 23:34:02,008 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 171 transitions. Word has length 155 [2022-03-19 23:34:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:34:02,008 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 171 transitions. [2022-03-19 23:34:02,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 171 transitions. [2022-03-19 23:34:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 23:34:02,009 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:34:02,009 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:34:02,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-19 23:34:02,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-19 23:34:02,209 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:34:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:34:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash 438306805, now seen corresponding path program 60 times [2022-03-19 23:34:02,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:34:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208295261] [2022-03-19 23:34:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:34:02,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:34:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:02,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:34:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:02,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:34:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:02,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 23:34:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:03,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:34:03,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208295261] [2022-03-19 23:34:03,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208295261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:34:03,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530645321] [2022-03-19 23:34:03,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:34:03,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:03,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:34:03,680 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:34:03,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-19 23:34:04,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2022-03-19 23:34:04,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:34:04,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-19 23:34:04,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:34:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 961 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:06,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:34:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1024 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:09,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530645321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:34:09,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:34:09,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 71, 71] total 206 [2022-03-19 23:34:09,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223483228] [2022-03-19 23:34:09,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:34:09,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-03-19 23:34:09,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:34:09,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-03-19 23:34:09,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7017, Invalid=35213, Unknown=0, NotChecked=0, Total=42230 [2022-03-19 23:34:09,507 INFO L87 Difference]: Start difference. First operand 167 states and 171 transitions. Second operand has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:34:12,394 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2022-03-19 23:34:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 23:34:12,394 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 155 [2022-03-19 23:34:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:34:12,395 INFO L225 Difference]: With dead ends: 177 [2022-03-19 23:34:12,395 INFO L226 Difference]: Without dead ends: 167 [2022-03-19 23:34:12,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37084 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=11863, Invalid=64037, Unknown=0, NotChecked=0, Total=75900 [2022-03-19 23:34:12,399 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 226 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:34:12,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 115 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:34:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-19 23:34:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-03-19 23:34:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 154 states have (on average 1.025974025974026) internal successors, (158), 156 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:34:12,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2022-03-19 23:34:12,426 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 155 [2022-03-19 23:34:12,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:34:12,426 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2022-03-19 23:34:12,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.0) internal successors, (412), 205 states have internal predecessors, (412), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:12,426 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2022-03-19 23:34:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-19 23:34:12,426 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:34:12,426 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:34:12,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-19 23:34:12,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:12,628 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:34:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:34:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1442182665, now seen corresponding path program 61 times [2022-03-19 23:34:12,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:34:12,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431351529] [2022-03-19 23:34:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:34:12,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:34:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:12,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:34:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:12,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:34:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:13,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 23:34:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:13,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:34:13,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431351529] [2022-03-19 23:34:13,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431351529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:34:13,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57965789] [2022-03-19 23:34:13,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:34:13,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:13,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:34:13,872 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:34:13,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-19 23:34:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:14,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-19 23:34:14,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:34:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:16,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:34:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:20,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57965789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:34:20,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:34:20,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 213 [2022-03-19 23:34:20,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745070512] [2022-03-19 23:34:20,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:34:20,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-03-19 23:34:20,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:34:20,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-03-19 23:34:20,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7373, Invalid=37783, Unknown=0, NotChecked=0, Total=45156 [2022-03-19 23:34:20,132 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:34:23,050 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2022-03-19 23:34:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-19 23:34:23,051 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 157 [2022-03-19 23:34:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:34:23,052 INFO L225 Difference]: With dead ends: 190 [2022-03-19 23:34:23,052 INFO L226 Difference]: Without dead ends: 179 [2022-03-19 23:34:23,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39875 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=12533, Invalid=69549, Unknown=0, NotChecked=0, Total=82082 [2022-03-19 23:34:23,055 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 346 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:34:23,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 77 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:34:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-19 23:34:23,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 169. [2022-03-19 23:34:23,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 159 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:34:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2022-03-19 23:34:23,083 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 157 [2022-03-19 23:34:23,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:34:23,083 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2022-03-19 23:34:23,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2022-03-19 23:34:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-19 23:34:23,084 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:34:23,084 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:34:23,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-19 23:34:23,285 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:23,285 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:34:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:34:23,285 INFO L85 PathProgramCache]: Analyzing trace with hash -555483085, now seen corresponding path program 61 times [2022-03-19 23:34:23,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:34:23,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680244583] [2022-03-19 23:34:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:34:23,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:34:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:23,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:34:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:23,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:34:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:23,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 23:34:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:24,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:34:24,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680244583] [2022-03-19 23:34:24,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680244583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:34:24,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426807949] [2022-03-19 23:34:24,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:34:24,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:24,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:34:24,864 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:34:24,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-19 23:34:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-19 23:34:25,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:34:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:27,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:34:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1024 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:30,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426807949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:34:30,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:34:30,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 213 [2022-03-19 23:34:30,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876586329] [2022-03-19 23:34:30,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:34:30,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-03-19 23:34:30,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:34:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-03-19 23:34:30,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7373, Invalid=37783, Unknown=0, NotChecked=0, Total=45156 [2022-03-19 23:34:30,827 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:34:33,887 INFO L93 Difference]: Finished difference Result 185 states and 190 transitions. [2022-03-19 23:34:33,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-19 23:34:33,888 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 157 [2022-03-19 23:34:33,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:34:33,888 INFO L225 Difference]: With dead ends: 185 [2022-03-19 23:34:33,888 INFO L226 Difference]: Without dead ends: 176 [2022-03-19 23:34:33,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39908 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=12533, Invalid=69549, Unknown=0, NotChecked=0, Total=82082 [2022-03-19 23:34:33,892 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 212 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:34:33,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 95 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:34:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-19 23:34:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2022-03-19 23:34:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.0375) internal successors, (166), 162 states have internal predecessors, (166), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:34:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 177 transitions. [2022-03-19 23:34:33,920 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 177 transitions. Word has length 157 [2022-03-19 23:34:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:34:33,921 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 177 transitions. [2022-03-19 23:34:33,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.9812206572769953) internal successors, (422), 212 states have internal predecessors, (422), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 177 transitions. [2022-03-19 23:34:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-19 23:34:33,921 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:34:33,921 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:34:33,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-19 23:34:34,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-19 23:34:34,133 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:34:34,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:34:34,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1324446261, now seen corresponding path program 62 times [2022-03-19 23:34:34,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:34:34,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745710564] [2022-03-19 23:34:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:34:34,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:34:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:34,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:34:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:34,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:34:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:34,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 23:34:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:35,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:34:35,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745710564] [2022-03-19 23:34:35,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745710564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:34:35,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304908067] [2022-03-19 23:34:35,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:34:35,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:35,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:34:35,343 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:34:35,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-19 23:34:35,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:34:35,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:34:35,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-19 23:34:35,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:34:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:37,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:34:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:41,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304908067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:34:41,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:34:41,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 73, 73] total 212 [2022-03-19 23:34:41,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283960437] [2022-03-19 23:34:41,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:34:41,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2022-03-19 23:34:41,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:34:41,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2022-03-19 23:34:41,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7433, Invalid=37299, Unknown=0, NotChecked=0, Total=44732 [2022-03-19 23:34:41,627 INFO L87 Difference]: Start difference. First operand 172 states and 177 transitions. Second operand has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:34:44,521 INFO L93 Difference]: Finished difference Result 187 states and 192 transitions. [2022-03-19 23:34:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 23:34:44,522 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 159 [2022-03-19 23:34:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:34:44,523 INFO L225 Difference]: With dead ends: 187 [2022-03-19 23:34:44,523 INFO L226 Difference]: Without dead ends: 175 [2022-03-19 23:34:44,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39544 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=12561, Invalid=67811, Unknown=0, NotChecked=0, Total=80372 [2022-03-19 23:34:44,528 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 156 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:34:44,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 112 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:34:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-19 23:34:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2022-03-19 23:34:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 161 states have internal predecessors, (164), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:34:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2022-03-19 23:34:44,561 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 159 [2022-03-19 23:34:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:34:44,561 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2022-03-19 23:34:44,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2022-03-19 23:34:44,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-19 23:34:44,562 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:34:44,562 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:34:44,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-19 23:34:44,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-19 23:34:44,763 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:34:44,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:34:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1660241003, now seen corresponding path program 62 times [2022-03-19 23:34:44,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:34:44,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619599080] [2022-03-19 23:34:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:34:44,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:34:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:44,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:34:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:44,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:34:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:45,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 23:34:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:46,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:34:46,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619599080] [2022-03-19 23:34:46,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619599080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:34:46,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972571702] [2022-03-19 23:34:46,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:34:46,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:46,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:34:46,335 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:34:46,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-19 23:34:46,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:34:46,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:34:46,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-19 23:34:46,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:34:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1024 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:48,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:34:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1089 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:52,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972571702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:34:52,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:34:52,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 73, 73] total 212 [2022-03-19 23:34:52,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641782566] [2022-03-19 23:34:52,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:34:52,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2022-03-19 23:34:52,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:34:52,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2022-03-19 23:34:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7433, Invalid=37299, Unknown=0, NotChecked=0, Total=44732 [2022-03-19 23:34:52,066 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:55,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:34:55,231 INFO L93 Difference]: Finished difference Result 181 states and 184 transitions. [2022-03-19 23:34:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 23:34:55,231 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 159 [2022-03-19 23:34:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:34:55,232 INFO L225 Difference]: With dead ends: 181 [2022-03-19 23:34:55,232 INFO L226 Difference]: Without dead ends: 171 [2022-03-19 23:34:55,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39347 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=12561, Invalid=67811, Unknown=0, NotChecked=0, Total=80372 [2022-03-19 23:34:55,236 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 224 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:34:55,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 145 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2414 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:34:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-19 23:34:55,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-03-19 23:34:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 160 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:34:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2022-03-19 23:34:55,263 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 159 [2022-03-19 23:34:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:34:55,263 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2022-03-19 23:34:55,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.0) internal successors, (424), 211 states have internal predecessors, (424), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:34:55,264 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2022-03-19 23:34:55,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-19 23:34:55,264 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:34:55,264 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:34:55,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-19 23:34:55,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:55,467 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:34:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:34:55,467 INFO L85 PathProgramCache]: Analyzing trace with hash 488002967, now seen corresponding path program 63 times [2022-03-19 23:34:55,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:34:55,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616844807] [2022-03-19 23:34:55,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:34:55,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:34:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:55,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:34:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:55,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:34:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:56,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 23:34:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:34:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:56,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:34:56,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616844807] [2022-03-19 23:34:56,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616844807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:34:56,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895141497] [2022-03-19 23:34:56,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:34:56,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:34:56,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:34:56,693 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:34:56,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-19 23:34:57,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-03-19 23:34:57,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:34:57,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 23:34:57,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:34:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:34:59,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:35:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:03,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895141497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:35:03,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:35:03,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 219 [2022-03-19 23:35:03,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169127070] [2022-03-19 23:35:03,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:35:03,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 219 states [2022-03-19 23:35:03,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:35:03,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2022-03-19 23:35:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7799, Invalid=39943, Unknown=0, NotChecked=0, Total=47742 [2022-03-19 23:35:03,096 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:35:06,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:35:06,364 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2022-03-19 23:35:06,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-19 23:35:06,365 INFO L78 Accepts]: Start accepts. Automaton has has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 161 [2022-03-19 23:35:06,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:35:06,365 INFO L225 Difference]: With dead ends: 194 [2022-03-19 23:35:06,365 INFO L226 Difference]: Without dead ends: 183 [2022-03-19 23:35:06,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42221 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=13249, Invalid=73481, Unknown=0, NotChecked=0, Total=86730 [2022-03-19 23:35:06,369 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 261 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:35:06,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 142 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:35:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-19 23:35:06,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 173. [2022-03-19 23:35:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.031055900621118) internal successors, (166), 163 states have internal predecessors, (166), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:35:06,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2022-03-19 23:35:06,397 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 161 [2022-03-19 23:35:06,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:35:06,397 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2022-03-19 23:35:06,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:35:06,397 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2022-03-19 23:35:06,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-19 23:35:06,397 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:35:06,397 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:35:06,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-19 23:35:06,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:35:06,598 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:35:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:35:06,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2071186349, now seen corresponding path program 63 times [2022-03-19 23:35:06,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:35:06,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989829170] [2022-03-19 23:35:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:35:06,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:35:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:06,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:35:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:06,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:35:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:07,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 23:35:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:08,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:35:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989829170] [2022-03-19 23:35:08,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989829170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:35:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512281825] [2022-03-19 23:35:08,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:35:08,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:35:08,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:35:08,177 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:35:08,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-19 23:35:08,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-03-19 23:35:08,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:35:08,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 23:35:08,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:35:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:10,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:35:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1089 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:14,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512281825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:35:14,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:35:14,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 219 [2022-03-19 23:35:14,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257059718] [2022-03-19 23:35:14,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:35:14,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 219 states [2022-03-19 23:35:14,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:35:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2022-03-19 23:35:14,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7799, Invalid=39943, Unknown=0, NotChecked=0, Total=47742 [2022-03-19 23:35:14,254 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:35:17,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:35:17,428 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2022-03-19 23:35:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-19 23:35:17,429 INFO L78 Accepts]: Start accepts. Automaton has has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 161 [2022-03-19 23:35:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:35:17,429 INFO L225 Difference]: With dead ends: 189 [2022-03-19 23:35:17,429 INFO L226 Difference]: Without dead ends: 180 [2022-03-19 23:35:17,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42255 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=13249, Invalid=73481, Unknown=0, NotChecked=0, Total=86730 [2022-03-19 23:35:17,433 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 319 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:35:17,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 120 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2063 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 23:35:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-19 23:35:17,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2022-03-19 23:35:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 164 states have (on average 1.0365853658536586) internal successors, (170), 166 states have internal predecessors, (170), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:35:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 181 transitions. [2022-03-19 23:35:17,470 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 181 transitions. Word has length 161 [2022-03-19 23:35:17,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:35:17,470 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 181 transitions. [2022-03-19 23:35:17,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 219 states, 219 states have (on average 1.9817351598173516) internal successors, (434), 218 states have internal predecessors, (434), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:35:17,470 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 181 transitions. [2022-03-19 23:35:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 23:35:17,471 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:35:17,471 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:35:17,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-19 23:35:17,690 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:35:17,690 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:35:17,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:35:17,690 INFO L85 PathProgramCache]: Analyzing trace with hash 727522901, now seen corresponding path program 64 times [2022-03-19 23:35:17,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:35:17,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753030454] [2022-03-19 23:35:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:35:17,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:35:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:17,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:35:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:17,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:35:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:18,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 23:35:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:18,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:35:18,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753030454] [2022-03-19 23:35:18,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753030454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:35:18,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570444630] [2022-03-19 23:35:18,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:35:18,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:35:18,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:35:18,929 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:35:18,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-19 23:35:19,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:35:19,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:35:19,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-19 23:35:19,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:35:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:21,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:35:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1156 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:25,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570444630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:35:25,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:35:25,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 75, 75] total 218 [2022-03-19 23:35:25,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807158164] [2022-03-19 23:35:25,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:35:25,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2022-03-19 23:35:25,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:35:25,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2022-03-19 23:35:25,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7861, Invalid=39445, Unknown=0, NotChecked=0, Total=47306 [2022-03-19 23:35:25,121 INFO L87 Difference]: Start difference. First operand 176 states and 181 transitions. Second operand has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:35:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:35:28,022 INFO L93 Difference]: Finished difference Result 191 states and 196 transitions. [2022-03-19 23:35:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-19 23:35:28,023 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 163 [2022-03-19 23:35:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:35:28,023 INFO L225 Difference]: With dead ends: 191 [2022-03-19 23:35:28,023 INFO L226 Difference]: Without dead ends: 179 [2022-03-19 23:35:28,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 185 SyntacticMatches, 5 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41880 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=13279, Invalid=71693, Unknown=0, NotChecked=0, Total=84972 [2022-03-19 23:35:28,027 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 275 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:35:28,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 142 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:35:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-19 23:35:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2022-03-19 23:35:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 163 states have (on average 1.030674846625767) internal successors, (168), 165 states have internal predecessors, (168), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:35:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 179 transitions. [2022-03-19 23:35:28,056 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 179 transitions. Word has length 163 [2022-03-19 23:35:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:35:28,057 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 179 transitions. [2022-03-19 23:35:28,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:35:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 179 transitions. [2022-03-19 23:35:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 23:35:28,057 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:35:28,057 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:35:28,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-19 23:35:28,257 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-19 23:35:28,258 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:35:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:35:28,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1460209717, now seen corresponding path program 64 times [2022-03-19 23:35:28,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:35:28,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867495797] [2022-03-19 23:35:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:35:28,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:35:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:28,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:35:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:28,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:35:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:28,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 23:35:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:29,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:35:29,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867495797] [2022-03-19 23:35:29,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867495797] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:35:29,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024614064] [2022-03-19 23:35:29,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:35:29,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:35:29,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:35:29,805 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:35:29,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-19 23:35:30,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:35:30,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:35:30,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-19 23:35:30,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:35:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1089 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:32,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:35:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1156 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:35,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024614064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:35:35,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:35:35,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 75, 75] total 218 [2022-03-19 23:35:35,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055371659] [2022-03-19 23:35:35,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:35:35,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2022-03-19 23:35:35,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:35:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2022-03-19 23:35:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7861, Invalid=39445, Unknown=0, NotChecked=0, Total=47306 [2022-03-19 23:35:35,724 INFO L87 Difference]: Start difference. First operand 175 states and 179 transitions. Second operand has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:35:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:35:38,509 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2022-03-19 23:35:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-19 23:35:38,510 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 163 [2022-03-19 23:35:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:35:38,510 INFO L225 Difference]: With dead ends: 185 [2022-03-19 23:35:38,510 INFO L226 Difference]: Without dead ends: 175 [2022-03-19 23:35:38,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 185 SyntacticMatches, 5 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41677 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=13279, Invalid=71693, Unknown=0, NotChecked=0, Total=84972 [2022-03-19 23:35:38,517 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 216 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:35:38,517 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 100 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:35:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-19 23:35:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-03-19 23:35:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 164 states have internal predecessors, (166), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:35:38,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 177 transitions. [2022-03-19 23:35:38,575 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 177 transitions. Word has length 163 [2022-03-19 23:35:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:35:38,575 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 177 transitions. [2022-03-19 23:35:38,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 2.0) internal successors, (436), 217 states have internal predecessors, (436), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:35:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 177 transitions. [2022-03-19 23:35:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-19 23:35:38,576 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:35:38,576 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:35:38,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-19 23:35:38,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-19 23:35:38,777 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:35:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:35:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1353972279, now seen corresponding path program 65 times [2022-03-19 23:35:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:35:38,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736612963] [2022-03-19 23:35:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:35:38,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:35:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:38,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:35:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:38,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:35:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:39,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 23:35:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:40,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:35:40,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736612963] [2022-03-19 23:35:40,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736612963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:35:40,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540146013] [2022-03-19 23:35:40,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:35:40,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:35:40,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:35:40,101 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:35:40,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-19 23:35:40,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-03-19 23:35:40,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:35:40,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 23:35:40,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:35:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:42,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:35:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:46,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540146013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:35:46,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:35:46,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 225 [2022-03-19 23:35:46,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139300386] [2022-03-19 23:35:46,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:35:46,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 225 states [2022-03-19 23:35:46,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:35:46,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2022-03-19 23:35:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8237, Invalid=42163, Unknown=0, NotChecked=0, Total=50400 [2022-03-19 23:35:46,783 INFO L87 Difference]: Start difference. First operand 174 states and 177 transitions. Second operand has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:35:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:35:50,178 INFO L93 Difference]: Finished difference Result 198 states and 205 transitions. [2022-03-19 23:35:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-19 23:35:50,178 INFO L78 Accepts]: Start accepts. Automaton has has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 165 [2022-03-19 23:35:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:35:50,179 INFO L225 Difference]: With dead ends: 198 [2022-03-19 23:35:50,179 INFO L226 Difference]: Without dead ends: 187 [2022-03-19 23:35:50,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44634 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=13985, Invalid=77521, Unknown=0, NotChecked=0, Total=91506 [2022-03-19 23:35:50,182 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 234 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:35:50,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 137 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 23:35:50,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-19 23:35:50,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2022-03-19 23:35:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 165 states have (on average 1.0303030303030303) internal successors, (170), 167 states have internal predecessors, (170), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:35:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-03-19 23:35:50,213 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 165 [2022-03-19 23:35:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:35:50,213 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-03-19 23:35:50,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:35:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-03-19 23:35:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-19 23:35:50,214 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:35:50,214 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:35:50,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-19 23:35:50,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-19 23:35:50,414 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:35:50,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:35:50,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1284660877, now seen corresponding path program 65 times [2022-03-19 23:35:50,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:35:50,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185247485] [2022-03-19 23:35:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:35:50,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:35:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:50,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:35:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:50,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:35:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:51,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 23:35:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:35:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:52,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:35:52,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185247485] [2022-03-19 23:35:52,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185247485] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:35:52,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309352710] [2022-03-19 23:35:52,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:35:52,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:35:52,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:35:52,143 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:35:52,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-19 23:35:52,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-03-19 23:35:52,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:35:52,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 23:35:52,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:35:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:55,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:35:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1156 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:35:58,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309352710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:35:58,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:35:58,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 225 [2022-03-19 23:35:58,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789607375] [2022-03-19 23:35:58,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:35:58,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 225 states [2022-03-19 23:35:58,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:35:58,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2022-03-19 23:35:58,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8237, Invalid=42163, Unknown=0, NotChecked=0, Total=50400 [2022-03-19 23:35:58,482 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:36:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:36:01,629 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2022-03-19 23:36:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-19 23:36:01,629 INFO L78 Accepts]: Start accepts. Automaton has has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 165 [2022-03-19 23:36:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:36:01,630 INFO L225 Difference]: With dead ends: 193 [2022-03-19 23:36:01,630 INFO L226 Difference]: Without dead ends: 184 [2022-03-19 23:36:01,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44669 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=13985, Invalid=77521, Unknown=0, NotChecked=0, Total=91506 [2022-03-19 23:36:01,634 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 315 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:36:01,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 115 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:36:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-19 23:36:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2022-03-19 23:36:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 168 states have (on average 1.0357142857142858) internal successors, (174), 170 states have internal predecessors, (174), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:36:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2022-03-19 23:36:01,664 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 165 [2022-03-19 23:36:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:36:01,664 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2022-03-19 23:36:01,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 225 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 224 states have internal predecessors, (446), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:36:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2022-03-19 23:36:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-19 23:36:01,664 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:36:01,664 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:36:01,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-19 23:36:01,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-19 23:36:01,866 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:36:01,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:36:01,867 INFO L85 PathProgramCache]: Analyzing trace with hash 664257397, now seen corresponding path program 66 times [2022-03-19 23:36:01,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:36:01,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156449896] [2022-03-19 23:36:01,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:36:01,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:36:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:36:01,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:36:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:36:01,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:36:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:36:02,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 23:36:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:36:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:36:03,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:36:03,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156449896] [2022-03-19 23:36:03,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156449896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:36:03,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308586126] [2022-03-19 23:36:03,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:36:03,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:36:03,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:36:03,124 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:36:03,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-19 23:36:03,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2022-03-19 23:36:03,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:36:03,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-19 23:36:03,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:36:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:36:05,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:36:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1225 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:36:09,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308586126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:36:09,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:36:09,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 77, 77] total 224 [2022-03-19 23:36:09,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618667950] [2022-03-19 23:36:09,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:36:09,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2022-03-19 23:36:09,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:36:09,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2022-03-19 23:36:09,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8301, Invalid=41651, Unknown=0, NotChecked=0, Total=49952 [2022-03-19 23:36:09,640 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:36:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:36:12,883 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2022-03-19 23:36:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-19 23:36:12,884 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 167 [2022-03-19 23:36:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:36:12,885 INFO L225 Difference]: With dead ends: 195 [2022-03-19 23:36:12,885 INFO L226 Difference]: Without dead ends: 183 [2022-03-19 23:36:12,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44283 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=14017, Invalid=75683, Unknown=0, NotChecked=0, Total=89700 [2022-03-19 23:36:12,890 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 169 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:36:12,890 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 132 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2276 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 23:36:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-19 23:36:12,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2022-03-19 23:36:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 167 states have (on average 1.029940119760479) internal successors, (172), 169 states have internal predecessors, (172), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:36:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 183 transitions. [2022-03-19 23:36:12,921 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 183 transitions. Word has length 167 [2022-03-19 23:36:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:36:12,921 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 183 transitions. [2022-03-19 23:36:12,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 224 states have (on average 2.0) internal successors, (448), 223 states have internal predecessors, (448), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 23:36:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 183 transitions. [2022-03-19 23:36:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-19 23:36:12,922 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:36:12,922 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:36:12,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-19 23:36:13,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:36:13,122 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:36:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:36:13,123 INFO L85 PathProgramCache]: Analyzing trace with hash 380644821, now seen corresponding path program 66 times [2022-03-19 23:36:13,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:36:13,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658776232] [2022-03-19 23:36:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:36:13,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:36:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:36:13,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:36:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:36:13,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 23:36:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:36:13,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 23:36:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:36:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1156 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:36:14,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:36:14,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658776232] [2022-03-19 23:36:14,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658776232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:36:14,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858515229] [2022-03-19 23:36:14,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:36:14,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:36:14,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:36:14,907 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:36:14,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process