/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/verifythis/duplets.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 08:50:17,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 08:50:17,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 08:50:17,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 08:50:17,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 08:50:17,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 08:50:17,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 08:50:17,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 08:50:17,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 08:50:17,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 08:50:17,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 08:50:17,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 08:50:17,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 08:50:18,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 08:50:18,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 08:50:18,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 08:50:18,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 08:50:18,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 08:50:18,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 08:50:18,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 08:50:18,011 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 08:50:18,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 08:50:18,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 08:50:18,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 08:50:18,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 08:50:18,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 08:50:18,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 08:50:18,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 08:50:18,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 08:50:18,025 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 08:50:18,032 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 08:50:18,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 08:50:18,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 08:50:18,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 08:50:18,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 08:50:18,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 08:50:18,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 08:50:18,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 08:50:18,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 08:50:18,034 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 08:50:18,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 08:50:18,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 08:50:18,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 08:50:18,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 08:50:18,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 08:50:18,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 08:50:18,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 08:50:18,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 08:50:18,035 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 08:50:18,035 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 08:50:18,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 08:50:18,036 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 08:50:18,036 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 08:50:18,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 08:50:18,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 08:50:18,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 08:50:18,264 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 08:50:18,264 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 08:50:18,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/duplets.c [2022-03-19 08:50:18,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8d1670ed/4bb099c9235d4a27bf7da48805fcaff5/FLAG3f3c10e3d [2022-03-19 08:50:18,670 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 08:50:18,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c [2022-03-19 08:50:18,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8d1670ed/4bb099c9235d4a27bf7da48805fcaff5/FLAG3f3c10e3d [2022-03-19 08:50:18,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8d1670ed/4bb099c9235d4a27bf7da48805fcaff5 [2022-03-19 08:50:18,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 08:50:18,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 08:50:18,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 08:50:18,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 08:50:18,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 08:50:18,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 08:50:18" (1/1) ... [2022-03-19 08:50:18,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5879420d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:50:18, skipping insertion in model container [2022-03-19 08:50:18,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 08:50:18" (1/1) ... [2022-03-19 08:50:18,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 08:50:18,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 08:50:18,839 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c[485,498] [2022-03-19 08:50:18,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 08:50:18,876 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 08:50:18,885 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c[485,498] [2022-03-19 08:50:18,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 08:50:18,918 INFO L208 MainTranslator]: Completed translation [2022-03-19 08:50:18,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:50:18 WrapperNode [2022-03-19 08:50:18,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 08:50:18,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 08:50:18,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 08:50:18,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 08:50:18,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:50:18" (1/1) ... [2022-03-19 08:50:18,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:50:18" (1/1) ... [2022-03-19 08:50:18,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:50:18" (1/1) ... [2022-03-19 08:50:18,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:50:18" (1/1) ... [2022-03-19 08:50:18,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:50:18" (1/1) ... [2022-03-19 08:50:18,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:50:18" (1/1) ... [2022-03-19 08:50:18,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:50:18" (1/1) ... [2022-03-19 08:50:18,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 08:50:18,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 08:50:18,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 08:50:18,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 08:50:18,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:50:18" (1/1) ... [2022-03-19 08:50:18,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 08:50:18,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:50:18,979 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 08:50:19,004 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 08:50:19,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 08:50:19,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 08:50:19,019 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 08:50:19,019 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 08:50:19,020 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 08:50:19,020 INFO L138 BoogieDeclarations]: Found implementation of procedure mkdup [2022-03-19 08:50:19,020 INFO L138 BoogieDeclarations]: Found implementation of procedure finddup [2022-03-19 08:50:19,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 08:50:19,020 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-03-19 08:50:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-03-19 08:50:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-03-19 08:50:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 08:50:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 08:50:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 08:50:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 08:50:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 08:50:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 08:50:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 08:50:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure mkdup [2022-03-19 08:50:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 08:50:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure finddup [2022-03-19 08:50:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 08:50:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 08:50:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-19 08:50:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 08:50:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-03-19 08:50:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 08:50:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 08:50:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 08:50:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 08:50:19,106 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 08:50:19,107 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 08:50:19,294 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 08:50:19,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 08:50:19,298 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 08:50:19,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 08:50:19 BoogieIcfgContainer [2022-03-19 08:50:19,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 08:50:19,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 08:50:19,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 08:50:19,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 08:50:19,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 08:50:18" (1/3) ... [2022-03-19 08:50:19,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c048f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 08:50:19, skipping insertion in model container [2022-03-19 08:50:19,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:50:18" (2/3) ... [2022-03-19 08:50:19,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c048f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 08:50:19, skipping insertion in model container [2022-03-19 08:50:19,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 08:50:19" (3/3) ... [2022-03-19 08:50:19,309 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-03-19 08:50:19,316 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 08:50:19,316 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 08:50:19,358 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 08:50:19,362 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 08:50:19,362 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 08:50:19,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 08:50:19,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 08:50:19,377 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:19,378 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:19,378 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:19,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1531213237, now seen corresponding path program 1 times [2022-03-19 08:50:19,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:19,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846809459] [2022-03-19 08:50:19,394 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1531213237, now seen corresponding path program 2 times [2022-03-19 08:50:19,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:19,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066277303] [2022-03-19 08:50:19,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:19,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:19,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:19,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:19,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:19,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:19,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:19,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:19,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:19,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 08:50:19,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:19,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066277303] [2022-03-19 08:50:19,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066277303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:19,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:19,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 08:50:19,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:19,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846809459] [2022-03-19 08:50:19,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846809459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:19,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:19,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 08:50:19,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311775796] [2022-03-19 08:50:19,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:19,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 08:50:19,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:19,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 08:50:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 08:50:19,571 INFO L87 Difference]: Start difference. First operand has 59 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 08:50:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:19,751 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2022-03-19 08:50:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 08:50:19,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-03-19 08:50:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:19,760 INFO L225 Difference]: With dead ends: 113 [2022-03-19 08:50:19,760 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 08:50:19,763 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 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 08:50:19,767 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:19,768 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 55 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:50:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 08:50:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-03-19 08:50:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 08:50:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-03-19 08:50:19,808 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 49 [2022-03-19 08:50:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:19,809 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-03-19 08:50:19,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 08:50:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-03-19 08:50:19,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 08:50:19,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:19,812 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:19,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 08:50:19,814 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1121655349, now seen corresponding path program 1 times [2022-03-19 08:50:19,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:19,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [45970225] [2022-03-19 08:50:19,817 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:19,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1121655349, now seen corresponding path program 2 times [2022-03-19 08:50:19,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:19,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516289227] [2022-03-19 08:50:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:19,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:19,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:19,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:20,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:20,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:20,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:20,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:20,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:20,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 08:50:20,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:20,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516289227] [2022-03-19 08:50:20,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516289227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:50:20,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825939573] [2022-03-19 08:50:20,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:50:20,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:20,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:50:20,154 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 08:50:20,155 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 08:50:20,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:50:20,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:50:20,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 08:50:20,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:50:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 08:50:20,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:50:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 08:50:20,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825939573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:50:20,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:50:20,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 17 [2022-03-19 08:50:20,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:20,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [45970225] [2022-03-19 08:50:20,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [45970225] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:20,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:20,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 08:50:20,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265418750] [2022-03-19 08:50:20,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:20,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 08:50:20,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:20,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 08:50:20,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-19 08:50:20,712 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 08:50:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:21,120 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2022-03-19 08:50:21,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 08:50:21,121 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 49 [2022-03-19 08:50:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:21,122 INFO L225 Difference]: With dead ends: 84 [2022-03-19 08:50:21,123 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 08:50:21,123 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-03-19 08:50:21,124 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 95 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:21,124 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 58 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:50:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 08:50:21,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-03-19 08:50:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 08:50:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-03-19 08:50:21,133 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 49 [2022-03-19 08:50:21,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:21,134 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-03-19 08:50:21,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 08:50:21,135 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-03-19 08:50:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 08:50:21,135 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:21,136 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:21,160 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 08:50:21,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:21,354 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:21,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2096379008, now seen corresponding path program 1 times [2022-03-19 08:50:21,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:21,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [56833934] [2022-03-19 08:50:21,355 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2096379008, now seen corresponding path program 2 times [2022-03-19 08:50:21,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:21,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408932681] [2022-03-19 08:50:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:21,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 08:50:21,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:21,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408932681] [2022-03-19 08:50:21,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408932681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:21,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:21,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 08:50:21,492 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:21,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [56833934] [2022-03-19 08:50:21,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [56833934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:21,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:21,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 08:50:21,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492347486] [2022-03-19 08:50:21,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:21,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 08:50:21,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:21,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 08:50:21,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-19 08:50:21,493 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 08:50:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:21,751 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-03-19 08:50:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 08:50:21,752 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 50 [2022-03-19 08:50:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:21,753 INFO L225 Difference]: With dead ends: 75 [2022-03-19 08:50:21,753 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 08:50:21,753 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-19 08:50:21,754 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 79 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:21,754 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 65 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:50:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 08:50:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-03-19 08:50:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 08:50:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-03-19 08:50:21,762 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 50 [2022-03-19 08:50:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:21,763 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-03-19 08:50:21,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 08:50:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-03-19 08:50:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 08:50:21,764 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:21,764 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:21,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 08:50:21,764 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:21,764 INFO L85 PathProgramCache]: Analyzing trace with hash 983031743, now seen corresponding path program 1 times [2022-03-19 08:50:21,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:21,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [974413056] [2022-03-19 08:50:21,765 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash 983031743, now seen corresponding path program 2 times [2022-03-19 08:50:21,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:21,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148920192] [2022-03-19 08:50:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:21,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:21,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:22,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:22,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 08:50:22,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:22,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148920192] [2022-03-19 08:50:22,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148920192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:50:22,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447468195] [2022-03-19 08:50:22,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:50:22,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:22,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:50:22,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:50:22,110 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 08:50:22,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:50:22,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:50:22,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 08:50:22,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:50:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 08:50:22,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:50:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 08:50:22,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447468195] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 08:50:22,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:50:22,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15, 12] total 25 [2022-03-19 08:50:22,778 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:22,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [974413056] [2022-03-19 08:50:22,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [974413056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:22,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:22,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 08:50:22,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999886684] [2022-03-19 08:50:22,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:22,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 08:50:22,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 08:50:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-19 08:50:22,780 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 08:50:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:22,892 INFO L93 Difference]: Finished difference Result 104 states and 126 transitions. [2022-03-19 08:50:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 08:50:22,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2022-03-19 08:50:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:22,893 INFO L225 Difference]: With dead ends: 104 [2022-03-19 08:50:22,893 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 08:50:22,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-03-19 08:50:22,894 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 44 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:22,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 410 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:50:22,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 08:50:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-03-19 08:50:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 08:50:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-19 08:50:22,901 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 52 [2022-03-19 08:50:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:22,902 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-19 08:50:22,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 08:50:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-19 08:50:22,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 08:50:22,903 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:22,903 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:22,920 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 08:50:23,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 08:50:23,120 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2045094069, now seen corresponding path program 1 times [2022-03-19 08:50:23,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:23,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [549642124] [2022-03-19 08:50:23,121 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:23,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2045094069, now seen corresponding path program 2 times [2022-03-19 08:50:23,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:23,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063819156] [2022-03-19 08:50:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:23,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 08:50:23,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:23,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063819156] [2022-03-19 08:50:23,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063819156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:50:23,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291325009] [2022-03-19 08:50:23,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:50:23,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:23,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:50:23,189 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 08:50:23,190 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 08:50:23,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:50:23,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:50:23,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:50:23,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:50:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 08:50:23,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:50:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 08:50:23,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291325009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:50:23,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:50:23,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 7 [2022-03-19 08:50:23,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:23,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [549642124] [2022-03-19 08:50:23,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [549642124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:23,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:23,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 08:50:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164244863] [2022-03-19 08:50:23,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:23,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 08:50:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 08:50:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-19 08:50:23,402 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 08:50:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:23,561 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-03-19 08:50:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 08:50:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 55 [2022-03-19 08:50:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:23,562 INFO L225 Difference]: With dead ends: 88 [2022-03-19 08:50:23,562 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 08:50:23,562 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-19 08:50:23,563 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:23,563 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 51 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:50:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 08:50:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-19 08:50:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 08:50:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-03-19 08:50:23,570 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 55 [2022-03-19 08:50:23,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:23,570 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-03-19 08:50:23,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 08:50:23,571 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-03-19 08:50:23,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 08:50:23,571 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:23,571 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:23,588 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 08:50:23,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:23,789 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:23,789 INFO L85 PathProgramCache]: Analyzing trace with hash 629236887, now seen corresponding path program 1 times [2022-03-19 08:50:23,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:23,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2111014759] [2022-03-19 08:50:23,790 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:23,790 INFO L85 PathProgramCache]: Analyzing trace with hash 629236887, now seen corresponding path program 2 times [2022-03-19 08:50:23,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:23,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303616620] [2022-03-19 08:50:23,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:23,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:23,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:24,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 08:50:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 08:50:24,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:24,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303616620] [2022-03-19 08:50:24,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303616620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:50:24,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924396685] [2022-03-19 08:50:24,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:50:24,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:24,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:50:24,050 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 08:50:24,051 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 08:50:24,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:50:24,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:50:24,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 08:50:24,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:50:24,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 08:50:24,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-03-19 08:50:24,257 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-03-19 08:50:24,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-03-19 08:50:24,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-03-19 08:50:24,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-19 08:50:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 08:50:24,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 08:50:24,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924396685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:24,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 08:50:24,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 24 [2022-03-19 08:50:24,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:24,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2111014759] [2022-03-19 08:50:24,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2111014759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:24,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:24,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 08:50:24,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765813378] [2022-03-19 08:50:24,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:24,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 08:50:24,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:24,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 08:50:24,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2022-03-19 08:50:24,369 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 10 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 08:50:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:24,536 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2022-03-19 08:50:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 08:50:24,537 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-03-19 08:50:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:24,538 INFO L225 Difference]: With dead ends: 85 [2022-03-19 08:50:24,538 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 08:50:24,538 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-19 08:50:24,539 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 45 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:24,539 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 446 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:50:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 08:50:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2022-03-19 08:50:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 50 states have internal predecessors, (56), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 08:50:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-03-19 08:50:24,547 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 57 [2022-03-19 08:50:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:24,547 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-03-19 08:50:24,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 08:50:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-03-19 08:50:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 08:50:24,548 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:24,548 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:24,567 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 08:50:24,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:24,763 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:24,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:24,763 INFO L85 PathProgramCache]: Analyzing trace with hash 631083929, now seen corresponding path program 1 times [2022-03-19 08:50:24,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:24,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [83312637] [2022-03-19 08:50:24,764 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:24,764 INFO L85 PathProgramCache]: Analyzing trace with hash 631083929, now seen corresponding path program 2 times [2022-03-19 08:50:24,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:24,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012503088] [2022-03-19 08:50:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:24,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:24,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:24,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:24,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:24,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:24,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:24,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:24,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:24,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:24,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 08:50:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 08:50:24,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:24,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012503088] [2022-03-19 08:50:24,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012503088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:24,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:24,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 08:50:24,896 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:24,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [83312637] [2022-03-19 08:50:24,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [83312637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:24,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:24,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 08:50:24,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269565311] [2022-03-19 08:50:24,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:24,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 08:50:24,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:24,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 08:50:24,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-19 08:50:24,898 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 08:50:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:25,267 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2022-03-19 08:50:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 08:50:25,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-03-19 08:50:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:25,269 INFO L225 Difference]: With dead ends: 106 [2022-03-19 08:50:25,269 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 08:50:25,270 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-19 08:50:25,270 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 100 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:25,270 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 58 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:50:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 08:50:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2022-03-19 08:50:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 57 states have internal predecessors, (65), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-03-19 08:50:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2022-03-19 08:50:25,280 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 57 [2022-03-19 08:50:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:25,280 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2022-03-19 08:50:25,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 08:50:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2022-03-19 08:50:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 08:50:25,281 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:25,281 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:25,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-19 08:50:25,281 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:25,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:25,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1636680555, now seen corresponding path program 3 times [2022-03-19 08:50:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:25,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1787762758] [2022-03-19 08:50:25,282 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:25,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1636680555, now seen corresponding path program 4 times [2022-03-19 08:50:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:25,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141602891] [2022-03-19 08:50:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:25,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:25,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:25,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:25,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:25,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:25,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:25,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:25,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:25,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-19 08:50:25,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:25,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141602891] [2022-03-19 08:50:25,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141602891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:50:25,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22335938] [2022-03-19 08:50:25,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:50:25,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:25,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:50:25,984 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 08:50:25,985 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 08:50:26,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:50:26,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:50:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 08:50:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:50:26,240 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-19 08:50:26,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-03-19 08:50:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-19 08:50:36,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:50:36,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22335938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:50:36,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:50:36,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2022-03-19 08:50:36,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:36,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1787762758] [2022-03-19 08:50:36,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1787762758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:36,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:36,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 08:50:36,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224427878] [2022-03-19 08:50:36,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:36,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 08:50:36,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:36,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 08:50:36,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1025, Unknown=5, NotChecked=0, Total=1122 [2022-03-19 08:50:36,880 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 21 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 08:50:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:44,045 INFO L93 Difference]: Finished difference Result 149 states and 184 transitions. [2022-03-19 08:50:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 08:50:44,046 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2022-03-19 08:50:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:44,047 INFO L225 Difference]: With dead ends: 149 [2022-03-19 08:50:44,047 INFO L226 Difference]: Without dead ends: 104 [2022-03-19 08:50:44,051 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=291, Invalid=2783, Unknown=6, NotChecked=0, Total=3080 [2022-03-19 08:50:44,051 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 144 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:44,052 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 68 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 08:50:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-19 08:50:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2022-03-19 08:50:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 60 states have internal predecessors, (69), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-03-19 08:50:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2022-03-19 08:50:44,062 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 58 [2022-03-19 08:50:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:44,063 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2022-03-19 08:50:44,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 08:50:44,063 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2022-03-19 08:50:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 08:50:44,063 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:44,063 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:44,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 08:50:44,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:44,275 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:44,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:44,275 INFO L85 PathProgramCache]: Analyzing trace with hash 596047115, now seen corresponding path program 5 times [2022-03-19 08:50:44,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:44,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1716081631] [2022-03-19 08:50:44,276 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash 596047115, now seen corresponding path program 6 times [2022-03-19 08:50:44,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:44,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418443456] [2022-03-19 08:50:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:44,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:44,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:44,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:44,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:44,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:44,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:44,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:44,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:44,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 08:50:44,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:44,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418443456] [2022-03-19 08:50:44,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418443456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:50:44,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452163542] [2022-03-19 08:50:44,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:50:44,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:44,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:50:44,368 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 08:50:44,396 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 08:50:44,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 08:50:44,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:50:44,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 08:50:44,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:50:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 08:50:44,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:50:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 08:50:44,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452163542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:50:44,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:50:44,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 10 [2022-03-19 08:50:44,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:44,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1716081631] [2022-03-19 08:50:44,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1716081631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:44,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:44,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 08:50:44,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377038892] [2022-03-19 08:50:44,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:44,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 08:50:44,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:44,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 08:50:44,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 08:50:44,648 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 08:50:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:44,976 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2022-03-19 08:50:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 08:50:44,976 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 61 [2022-03-19 08:50:44,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:44,978 INFO L225 Difference]: With dead ends: 140 [2022-03-19 08:50:44,978 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 08:50:44,979 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-03-19 08:50:44,980 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 73 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:44,980 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 57 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:50:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 08:50:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-03-19 08:50:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.203125) internal successors, (77), 66 states have internal predecessors, (77), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-03-19 08:50:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2022-03-19 08:50:44,997 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 61 [2022-03-19 08:50:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:44,997 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2022-03-19 08:50:44,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 08:50:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2022-03-19 08:50:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 08:50:44,999 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:44,999 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:45,018 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 08:50:45,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:45,216 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:45,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:45,217 INFO L85 PathProgramCache]: Analyzing trace with hash 645513954, now seen corresponding path program 1 times [2022-03-19 08:50:45,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:45,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [64970052] [2022-03-19 08:50:45,217 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:45,217 INFO L85 PathProgramCache]: Analyzing trace with hash 645513954, now seen corresponding path program 2 times [2022-03-19 08:50:45,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:45,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818633033] [2022-03-19 08:50:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:45,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 08:50:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 08:50:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 08:50:45,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:45,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818633033] [2022-03-19 08:50:45,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818633033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:45,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:45,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 08:50:45,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:45,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [64970052] [2022-03-19 08:50:45,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [64970052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:45,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:45,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 08:50:45,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521097026] [2022-03-19 08:50:45,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:45,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 08:50:45,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:45,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 08:50:45,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-19 08:50:45,338 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 08:50:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:45,596 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2022-03-19 08:50:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 08:50:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2022-03-19 08:50:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:45,597 INFO L225 Difference]: With dead ends: 111 [2022-03-19 08:50:45,597 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 08:50:45,598 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-19 08:50:45,598 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:45,598 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 49 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:50:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 08:50:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-03-19 08:50:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 18 states have call successors, (18), 9 states have call predecessors, (18), 10 states have return successors, (18), 17 states have call predecessors, (18), 16 states have call successors, (18) [2022-03-19 08:50:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2022-03-19 08:50:45,617 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 64 [2022-03-19 08:50:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:45,618 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2022-03-19 08:50:45,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 08:50:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2022-03-19 08:50:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 08:50:45,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:45,622 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:45,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-19 08:50:45,622 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash 643666912, now seen corresponding path program 1 times [2022-03-19 08:50:45,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:45,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [913923935] [2022-03-19 08:50:45,623 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash 643666912, now seen corresponding path program 2 times [2022-03-19 08:50:45,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:45,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168717618] [2022-03-19 08:50:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:45,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 08:50:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 08:50:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 08:50:45,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:45,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168717618] [2022-03-19 08:50:45,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168717618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:45,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:45,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 08:50:45,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:45,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [913923935] [2022-03-19 08:50:45,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [913923935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:45,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:45,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 08:50:45,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383946442] [2022-03-19 08:50:45,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:45,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 08:50:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:45,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 08:50:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-03-19 08:50:45,738 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 08:50:46,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:46,099 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2022-03-19 08:50:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 08:50:46,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2022-03-19 08:50:46,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:46,100 INFO L225 Difference]: With dead ends: 106 [2022-03-19 08:50:46,100 INFO L226 Difference]: Without dead ends: 104 [2022-03-19 08:50:46,100 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-19 08:50:46,101 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:46,101 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 56 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:50:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-19 08:50:46,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-03-19 08:50:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 72 states have internal predecessors, (82), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-03-19 08:50:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2022-03-19 08:50:46,112 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 64 [2022-03-19 08:50:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:46,113 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2022-03-19 08:50:46,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 08:50:46,113 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2022-03-19 08:50:46,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 08:50:46,113 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:46,113 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:46,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-19 08:50:46,114 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:46,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:46,114 INFO L85 PathProgramCache]: Analyzing trace with hash -779883059, now seen corresponding path program 1 times [2022-03-19 08:50:46,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:46,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [997889280] [2022-03-19 08:50:46,114 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:46,114 INFO L85 PathProgramCache]: Analyzing trace with hash -779883059, now seen corresponding path program 2 times [2022-03-19 08:50:46,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:46,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053235857] [2022-03-19 08:50:46,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:46,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:46,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:46,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:46,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:46,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:46,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:46,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:46,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:46,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:46,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 08:50:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 08:50:46,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:46,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053235857] [2022-03-19 08:50:46,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053235857] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:46,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:46,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 08:50:46,291 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:46,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [997889280] [2022-03-19 08:50:46,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [997889280] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:46,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:46,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 08:50:46,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819480025] [2022-03-19 08:50:46,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:46,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 08:50:46,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:46,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 08:50:46,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-03-19 08:50:46,293 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 08:50:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:46,877 INFO L93 Difference]: Finished difference Result 126 states and 149 transitions. [2022-03-19 08:50:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 08:50:46,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-03-19 08:50:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:46,878 INFO L225 Difference]: With dead ends: 126 [2022-03-19 08:50:46,878 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 08:50:46,878 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-03-19 08:50:46,879 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 82 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:46,879 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 67 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:50:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 08:50:46,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2022-03-19 08:50:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 64 states have internal predecessors, (72), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 08:50:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-03-19 08:50:46,895 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 66 [2022-03-19 08:50:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:46,895 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-03-19 08:50:46,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 08:50:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-03-19 08:50:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 08:50:46,896 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:46,896 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:46,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-19 08:50:46,896 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:46,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:46,896 INFO L85 PathProgramCache]: Analyzing trace with hash 297933182, now seen corresponding path program 1 times [2022-03-19 08:50:46,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:46,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1720281745] [2022-03-19 08:50:46,897 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:46,897 INFO L85 PathProgramCache]: Analyzing trace with hash 297933182, now seen corresponding path program 2 times [2022-03-19 08:50:46,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:46,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299632457] [2022-03-19 08:50:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:46,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:46,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:47,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:47,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:47,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:47,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:47,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:47,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:47,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:47,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 08:50:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:47,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 08:50:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:47,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 08:50:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 08:50:47,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:47,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299632457] [2022-03-19 08:50:47,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299632457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:50:47,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997113178] [2022-03-19 08:50:47,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:50:47,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:47,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:50:47,132 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 08:50:47,134 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 08:50:47,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:50:47,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:50:47,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 08:50:47,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:50:47,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 08:50:47,352 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-03-19 08:50:47,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-03-19 08:50:47,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-03-19 08:50:47,374 INFO L356 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2022-03-19 08:50:47,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 68 [2022-03-19 08:50:47,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 6 [2022-03-19 08:50:47,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2022-03-19 08:50:47,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-19 08:50:47,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-03-19 08:50:48,153 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 08:50:48,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2022-03-19 08:50:48,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-19 08:50:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 08:50:48,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:50:48,327 INFO L356 Elim1Store]: treesize reduction 28, result has 33.3 percent of original size [2022-03-19 08:50:48,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 52 [2022-03-19 08:50:48,338 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 08:50:48,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-03-19 08:50:48,343 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 08:50:48,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 63 [2022-03-19 08:50:48,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 75 [2022-03-19 08:50:48,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2022-03-19 08:50:48,380 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 08:50:48,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2022-03-19 08:50:48,443 INFO L356 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-03-19 08:50:48,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 87 [2022-03-19 08:50:48,468 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 08:50:48,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 215 [2022-03-19 08:50:48,480 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 08:50:48,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 216 [2022-03-19 08:50:48,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-19 08:50:48,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-19 08:50:48,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-03-19 08:50:48,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-03-19 08:50:48,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-03-19 08:50:48,736 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-03-19 08:50:48,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 143 [2022-03-19 08:50:48,821 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 08:50:48,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 126 [2022-03-19 08:50:48,922 INFO L356 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-03-19 08:50:48,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 1 [2022-03-19 08:50:49,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-03-19 08:50:49,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-19 08:50:49,241 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 08:50:49,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-19 08:50:49,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-19 08:50:49,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-19 08:50:49,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-03-19 08:50:49,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-03-19 08:50:49,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-19 08:50:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 08:50:49,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997113178] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 08:50:49,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:50:49,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16, 11] total 27 [2022-03-19 08:50:49,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:50:49,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1720281745] [2022-03-19 08:50:49,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1720281745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:50:49,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:50:49,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 08:50:49,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27200223] [2022-03-19 08:50:49,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:50:49,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 08:50:49,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:49,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 08:50:49,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=620, Unknown=5, NotChecked=0, Total=702 [2022-03-19 08:50:49,606 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 08:50:49,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:50:49,764 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2022-03-19 08:50:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 08:50:49,764 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2022-03-19 08:50:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:50:49,765 INFO L225 Difference]: With dead ends: 110 [2022-03-19 08:50:49,765 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 08:50:49,766 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=826, Unknown=5, NotChecked=0, Total=930 [2022-03-19 08:50:49,766 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:50:49,766 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 465 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:50:49,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 08:50:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-03-19 08:50:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 75 states have internal predecessors, (82), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-03-19 08:50:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2022-03-19 08:50:49,782 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 70 [2022-03-19 08:50:49,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:50:49,782 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2022-03-19 08:50:49,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 08:50:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2022-03-19 08:50:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 08:50:49,783 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:50:49,783 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:50:49,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 08:50:50,000 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:50,001 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:50:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:50:50,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1867983073, now seen corresponding path program 7 times [2022-03-19 08:50:50,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:50:50,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145404503] [2022-03-19 08:50:50,001 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:50:50,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1867983073, now seen corresponding path program 8 times [2022-03-19 08:50:50,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:50:50,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416706764] [2022-03-19 08:50:50,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:50:50,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:50:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:50,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:50:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:50,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:50,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:50:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:50,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:50:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:50:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:51,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:50:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:51,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:50:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:51,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:50:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:50:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-19 08:50:53,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:50:53,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416706764] [2022-03-19 08:50:53,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416706764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:50:53,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64711447] [2022-03-19 08:50:53,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:50:53,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:50:53,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:50:53,575 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 08:50:53,576 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 08:50:53,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:50:53,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:50:53,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 08:50:53,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:50:53,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-03-19 08:51:05,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-03-19 08:51:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 08:51:15,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:51:43,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64711447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:51:43,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:51:43,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 48 [2022-03-19 08:51:43,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:51:43,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145404503] [2022-03-19 08:51:43,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145404503] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:51:43,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:51:43,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 08:51:43,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696679564] [2022-03-19 08:51:43,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:51:43,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 08:51:43,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:51:43,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 08:51:43,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=3631, Unknown=36, NotChecked=0, Total=4032 [2022-03-19 08:51:43,215 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 27 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-19 08:51:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:51:50,863 INFO L93 Difference]: Finished difference Result 199 states and 239 transitions. [2022-03-19 08:51:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 08:51:50,863 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 67 [2022-03-19 08:51:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:51:50,865 INFO L225 Difference]: With dead ends: 199 [2022-03-19 08:51:50,865 INFO L226 Difference]: Without dead ends: 125 [2022-03-19 08:51:50,866 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2438 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=690, Invalid=7827, Unknown=39, NotChecked=0, Total=8556 [2022-03-19 08:51:50,867 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 199 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:51:50,867 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 67 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 08:51:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-19 08:51:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2022-03-19 08:51:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 84 states have internal predecessors, (94), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-03-19 08:51:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2022-03-19 08:51:50,891 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 67 [2022-03-19 08:51:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:51:50,891 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2022-03-19 08:51:50,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-19 08:51:50,891 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2022-03-19 08:51:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 08:51:50,892 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:51:50,892 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:51:50,913 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 08:51:51,107 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,SelfDestructingSolverStorable13 [2022-03-19 08:51:51,108 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:51:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:51:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1243098892, now seen corresponding path program 1 times [2022-03-19 08:51:51,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:51:51,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [826172519] [2022-03-19 08:51:51,109 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:51:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1243098892, now seen corresponding path program 2 times [2022-03-19 08:51:51,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:51:51,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960206918] [2022-03-19 08:51:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:51:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:51:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:51,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:51:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:51,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:51:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:51,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:51:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:51,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:51:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:51,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:51:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:51,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:51:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:51,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:51:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:51,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:51:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:51,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 08:51:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:51,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 08:51:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:51,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 08:51:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 08:51:51,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:51:51,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960206918] [2022-03-19 08:51:51,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960206918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:51:51,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915103131] [2022-03-19 08:51:51,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:51:51,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:51:51,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:51:51,420 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 08:51:51,421 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 08:51:51,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:51:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:51:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 08:51:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:51:51,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 08:51:51,704 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-03-19 08:51:51,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-03-19 08:51:52,028 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-19 08:51:52,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-19 08:51:52,083 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 08:51:52,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:51:52,267 INFO L356 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-03-19 08:51:52,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 670 treesize of output 606 [2022-03-19 08:51:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 08:51:52,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915103131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:51:52,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:51:52,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 31 [2022-03-19 08:51:52,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:51:52,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [826172519] [2022-03-19 08:51:52,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [826172519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:51:52,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:51:52,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 08:51:52,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028044997] [2022-03-19 08:51:52,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:51:52,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 08:51:52,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:51:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 08:51:52,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-19 08:51:52,788 INFO L87 Difference]: Start difference. First operand 115 states and 136 transitions. Second operand has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-19 08:51:53,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:51:53,383 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2022-03-19 08:51:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 08:51:53,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2022-03-19 08:51:53,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:51:53,389 INFO L225 Difference]: With dead ends: 135 [2022-03-19 08:51:53,389 INFO L226 Difference]: Without dead ends: 133 [2022-03-19 08:51:53,404 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 148 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=1676, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 08:51:53,405 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 102 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:51:53,405 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 68 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:51:53,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-19 08:51:53,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2022-03-19 08:51:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 93 states have internal predecessors, (103), 25 states have call successors, (25), 12 states have call predecessors, (25), 13 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-03-19 08:51:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2022-03-19 08:51:53,441 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 73 [2022-03-19 08:51:53,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:51:53,441 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2022-03-19 08:51:53,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-19 08:51:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2022-03-19 08:51:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-19 08:51:53,442 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:51:53,442 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 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, 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 08:51:53,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 08:51:53,671 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,SelfDestructingSolverStorable14 [2022-03-19 08:51:53,672 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:51:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:51:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash 680409498, now seen corresponding path program 1 times [2022-03-19 08:51:53,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:51:53,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1384810936] [2022-03-19 08:51:53,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:51:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash 680409498, now seen corresponding path program 2 times [2022-03-19 08:51:53,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:51:53,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298050644] [2022-03-19 08:51:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:51:53,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:51:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:53,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:51:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:53,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:51:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:53,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 08:51:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:53,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 08:51:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:53,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 08:51:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:53,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 08:51:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:53,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 08:51:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:53,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:51:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:54,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 08:51:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:54,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 08:51:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:54,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 08:51:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:54,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 08:51:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:51:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 08:51:54,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:51:54,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298050644] [2022-03-19 08:51:54,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298050644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:51:54,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256183934] [2022-03-19 08:51:54,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:51:54,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:51:54,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:51:54,140 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 08:51:54,159 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 08:51:54,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:51:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:51:54,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-19 08:51:54,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:51:54,308 INFO L356 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2022-03-19 08:51:54,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2022-03-19 08:51:54,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 08:51:54,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 08:51:54,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 08:51:54,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 08:51:54,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 34 [2022-03-19 08:51:59,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 08:51:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 08:51:59,636 INFO L356 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-03-19 08:51:59,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 36 [2022-03-19 08:51:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 08:51:59,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:52:10,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 08:52:10,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-19 08:52:14,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85436 treesize of output 84680 [2022-03-19 08:52:17,810 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-19 08:52:17,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75980 treesize of output 74684 [2022-03-19 08:52:18,243 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-03-19 08:52:18,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 08:52:18,460 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,SelfDestructingSolverStorable15 [2022-03-19 08:52:18,461 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:364) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.runStrategy(AcceleratedInterpolationCore.java:300) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:203) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-19 08:52:18,464 INFO L158 Benchmark]: Toolchain (without parser) took 119763.02ms. Allocated memory was 221.2MB in the beginning and 539.0MB in the end (delta: 317.7MB). Free memory was 197.2MB in the beginning and 289.9MB in the end (delta: -92.7MB). Peak memory consumption was 332.3MB. Max. memory is 8.0GB. [2022-03-19 08:52:18,464 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 221.2MB. Free memory is still 184.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 08:52:18,464 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.78ms. Allocated memory is still 221.2MB. Free memory was 197.2MB in the beginning and 193.6MB in the end (delta: 3.6MB). Peak memory consumption was 7.7MB. Max. memory is 8.0GB. [2022-03-19 08:52:18,464 INFO L158 Benchmark]: Boogie Preprocessor took 37.05ms. Allocated memory is still 221.2MB. Free memory was 193.6MB in the beginning and 191.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 08:52:18,464 INFO L158 Benchmark]: RCFGBuilder took 342.19ms. Allocated memory is still 221.2MB. Free memory was 191.7MB in the beginning and 177.6MB in the end (delta: 14.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-03-19 08:52:18,465 INFO L158 Benchmark]: TraceAbstraction took 119163.35ms. Allocated memory was 221.2MB in the beginning and 539.0MB in the end (delta: 317.7MB). Free memory was 177.1MB in the beginning and 289.9MB in the end (delta: -112.9MB). Peak memory consumption was 312.0MB. Max. memory is 8.0GB. [2022-03-19 08:52:18,465 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 221.2MB. Free memory is still 184.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 216.78ms. Allocated memory is still 221.2MB. Free memory was 197.2MB in the beginning and 193.6MB in the end (delta: 3.6MB). Peak memory consumption was 7.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.05ms. Allocated memory is still 221.2MB. Free memory was 193.6MB in the beginning and 191.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 342.19ms. Allocated memory is still 221.2MB. Free memory was 191.7MB in the beginning and 177.6MB in the end (delta: 14.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 119163.35ms. Allocated memory was 221.2MB in the beginning and 539.0MB in the end (delta: 317.7MB). Free memory was 177.1MB in the beginning and 289.9MB in the end (delta: -112.9MB). Peak memory consumption was 312.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-19 08:52:18,675 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-03-19 08:52:18,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...