/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-crafted/mapsum2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:47:04,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:47:04,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:47:04,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:47:04,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:47:04,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:47:04,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:47:04,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:47:04,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:47:04,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:47:04,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:47:04,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:47:04,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:47:04,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:47:04,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:47:04,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:47:04,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:47:04,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:47:04,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:47:04,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:47:04,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:47:04,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:47:04,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:47:04,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:47:04,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:47:04,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 09:47:04,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 09:47:04,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 09:47:04,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 09:47:04,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 09:47:04,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 09:47:04,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 09:47:04,708 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 09:47:04,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:47:04,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:47:04,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:47:04,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:47:04,723 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:47:04,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:47:04,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:47:04,730 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:47:04,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:47:04,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:47:04,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:47:04,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:47:04,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:47:04,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:47:04,731 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:47:04,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:47:04,732 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:47:04,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:47:04,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:47:04,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:47:04,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:47:04,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:47:04,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:47:04,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:47:04,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:47:04,734 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:47:04,734 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:47:04,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:47:04,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:47:04,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:47:04,986 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:47:04,987 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:47:04,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum2.i [2022-01-31 09:47:05,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8a162599/4ad0532d506d41c0a6c1573b1176a1cb/FLAG8d40dc7d0 [2022-01-31 09:47:05,428 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:47:05,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum2.i [2022-01-31 09:47:05,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8a162599/4ad0532d506d41c0a6c1573b1176a1cb/FLAG8d40dc7d0 [2022-01-31 09:47:05,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8a162599/4ad0532d506d41c0a6c1573b1176a1cb [2022-01-31 09:47:05,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:47:05,450 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:47:05,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:47:05,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:47:05,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:47:05,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:47:05" (1/1) ... [2022-01-31 09:47:05,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337ac213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:47:05, skipping insertion in model container [2022-01-31 09:47:05,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:47:05" (1/1) ... [2022-01-31 09:47:05,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:47:05,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:47:05,630 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum2.i[1306,1319] [2022-01-31 09:47:05,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:47:05,647 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:47:05,688 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum2.i[1306,1319] [2022-01-31 09:47:05,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:47:05,706 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:47:05,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:47:05 WrapperNode [2022-01-31 09:47:05,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:47:05,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:47:05,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:47:05,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:47:05,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:47:05" (1/1) ... [2022-01-31 09:47:05,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:47:05" (1/1) ... [2022-01-31 09:47:05,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:47:05" (1/1) ... [2022-01-31 09:47:05,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:47:05" (1/1) ... [2022-01-31 09:47:05,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:47:05" (1/1) ... [2022-01-31 09:47:05,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:47:05" (1/1) ... [2022-01-31 09:47:05,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:47:05" (1/1) ... [2022-01-31 09:47:05,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:47:05,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:47:05,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:47:05,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:47:05,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:47:05" (1/1) ... [2022-01-31 09:47:05,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:47:05,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:05,801 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) [2022-01-31 09:47:05,826 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 [2022-01-31 09:47:05,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:47:05,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:47:05,835 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:47:05,835 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2022-01-31 09:47:05,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:47:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:47:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:47:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 09:47:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 09:47:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:47:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:47:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:47:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2022-01-31 09:47:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:47:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:47:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:47:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:47:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:47:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:47:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:47:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:47:05,925 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:47:05,926 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:47:06,107 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:47:06,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:47:06,114 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 09:47:06,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:47:06 BoogieIcfgContainer [2022-01-31 09:47:06,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:47:06,117 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:47:06,117 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:47:06,118 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:47:06,120 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:47:06" (1/1) ... [2022-01-31 09:47:06,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:47:06 BasicIcfg [2022-01-31 09:47:06,137 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:47:06,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:47:06,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:47:06,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:47:06,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:47:05" (1/4) ... [2022-01-31 09:47:06,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172163a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:47:06, skipping insertion in model container [2022-01-31 09:47:06,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:47:05" (2/4) ... [2022-01-31 09:47:06,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172163a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:47:06, skipping insertion in model container [2022-01-31 09:47:06,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:47:06" (3/4) ... [2022-01-31 09:47:06,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172163a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:47:06, skipping insertion in model container [2022-01-31 09:47:06,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:47:06" (4/4) ... [2022-01-31 09:47:06,145 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum2.iJordan [2022-01-31 09:47:06,149 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:47:06,149 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:47:06,188 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:47:06,194 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 09:47:06,194 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:47:06,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:47:06,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 09:47:06,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:06,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:47:06,214 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:06,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:06,218 INFO L85 PathProgramCache]: Analyzing trace with hash 142417289, now seen corresponding path program 1 times [2022-01-31 09:47:06,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:06,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127696583] [2022-01-31 09:47:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:06,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:06,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:06,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 09:47:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:06,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 09:47:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:06,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 09:47:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 09:47:06,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:06,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127696583] [2022-01-31 09:47:06,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127696583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:47:06,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:47:06,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:47:06,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083248570] [2022-01-31 09:47:06,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:47:06,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:47:06,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:06,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:47:06,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:47:06,428 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:47:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:06,462 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-31 09:47:06,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:47:06,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 09:47:06,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:06,470 INFO L225 Difference]: With dead ends: 31 [2022-01-31 09:47:06,471 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 09:47:06,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:47:06,475 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:06,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:47:06,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 09:47:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 09:47:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-31 09:47:06,506 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2022-01-31 09:47:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:06,506 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-31 09:47:06,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:47:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-31 09:47:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 09:47:06,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:06,508 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:47:06,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:47:06,509 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:06,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1780278, now seen corresponding path program 1 times [2022-01-31 09:47:06,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:06,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190044242] [2022-01-31 09:47:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:06,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:06,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:06,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 09:47:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:06,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 09:47:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:06,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 09:47:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 09:47:06,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:06,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190044242] [2022-01-31 09:47:06,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190044242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:06,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719154944] [2022-01-31 09:47:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:06,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:06,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:06,630 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) [2022-01-31 09:47:06,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 09:47:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 09:47:06,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 09:47:06,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:47:06,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719154944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:47:06,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 09:47:06,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 09:47:06,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650798959] [2022-01-31 09:47:06,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:47:06,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:47:06,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:06,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:47:06,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:47:06,795 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:47:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:06,803 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 09:47:06,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:47:06,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 09:47:06,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:06,805 INFO L225 Difference]: With dead ends: 28 [2022-01-31 09:47:06,805 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 09:47:06,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:47:06,806 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:06,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:47:06,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 09:47:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 09:47:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 09:47:06,812 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2022-01-31 09:47:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:06,813 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 09:47:06,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:47:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 09:47:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 09:47:06,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:06,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:47:06,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 09:47:07,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:07,039 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:07,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash 561300940, now seen corresponding path program 1 times [2022-01-31 09:47:07,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:07,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124643882] [2022-01-31 09:47:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:07,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:07,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:07,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 09:47:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:07,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 09:47:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:07,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:47:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 09:47:07,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:07,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124643882] [2022-01-31 09:47:07,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124643882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:07,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057168433] [2022-01-31 09:47:07,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:07,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:07,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:07,196 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) [2022-01-31 09:47:07,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 09:47:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:07,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 09:47:07,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:47:07,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:47:07,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057168433] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:47:07,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 09:47:07,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-31 09:47:07,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032580952] [2022-01-31 09:47:07,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:47:07,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:47:07,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:07,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:47:07,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:47:07,373 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:47:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:07,390 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-01-31 09:47:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:47:07,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-31 09:47:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:07,392 INFO L225 Difference]: With dead ends: 29 [2022-01-31 09:47:07,392 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 09:47:07,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:47:07,396 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:07,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:47:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 09:47:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 09:47:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 09:47:07,411 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2022-01-31 09:47:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:07,411 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 09:47:07,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:47:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 09:47:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 09:47:07,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:07,415 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 09:47:07,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 09:47:07,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 09:47:07,633 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:07,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1061096375, now seen corresponding path program 1 times [2022-01-31 09:47:07,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:07,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775251728] [2022-01-31 09:47:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:07,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:07,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:07,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 09:47:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:07,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 09:47:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:07,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 09:47:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 09:47:07,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:07,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775251728] [2022-01-31 09:47:07,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775251728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:07,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526189734] [2022-01-31 09:47:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:07,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:07,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:07,737 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) [2022-01-31 09:47:07,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 09:47:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:07,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 09:47:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 09:47:07,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:47:07,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526189734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:47:07,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 09:47:07,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 09:47:07,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013276323] [2022-01-31 09:47:07,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:47:07,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:47:07,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:07,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:47:07,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:47:07,891 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:47:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:07,899 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-31 09:47:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:47:07,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-31 09:47:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:07,901 INFO L225 Difference]: With dead ends: 30 [2022-01-31 09:47:07,901 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 09:47:07,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:47:07,902 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:07,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:47:07,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 09:47:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 09:47:07,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 09:47:07,906 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2022-01-31 09:47:07,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:07,908 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 09:47:07,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:47:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 09:47:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 09:47:07,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:07,909 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 09:47:07,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 09:47:08,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:08,132 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:08,133 INFO L85 PathProgramCache]: Analyzing trace with hash -619501722, now seen corresponding path program 1 times [2022-01-31 09:47:08,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:08,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451437756] [2022-01-31 09:47:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:08,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:08,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:08,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 09:47:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:08,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 09:47:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:08,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 09:47:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:47:08,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:08,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451437756] [2022-01-31 09:47:08,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451437756] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:08,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131698131] [2022-01-31 09:47:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:08,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:08,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:08,254 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) [2022-01-31 09:47:08,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 09:47:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:08,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 09:47:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:47:08,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:47:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:47:08,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131698131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:47:08,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:47:08,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 09:47:08,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908939641] [2022-01-31 09:47:08,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:47:08,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:47:08,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:47:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:47:08,559 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:08,670 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-01-31 09:47:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:47:08,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-01-31 09:47:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:08,673 INFO L225 Difference]: With dead ends: 35 [2022-01-31 09:47:08,673 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 09:47:08,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 09:47:08,675 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:08,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:47:08,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 09:47:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 09:47:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-31 09:47:08,688 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2022-01-31 09:47:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:08,688 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-31 09:47:08,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-31 09:47:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 09:47:08,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:08,691 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 09:47:08,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 09:47:08,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:08,908 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:08,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1074871916, now seen corresponding path program 2 times [2022-01-31 09:47:08,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:08,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225809525] [2022-01-31 09:47:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:08,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:08,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:08,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 09:47:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:08,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 09:47:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:08,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 09:47:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 09:47:08,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:08,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225809525] [2022-01-31 09:47:08,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225809525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:08,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081744886] [2022-01-31 09:47:08,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:47:08,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:08,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:08,986 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) [2022-01-31 09:47:09,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 09:47:09,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:47:09,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:47:09,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 09:47:09,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:47:09,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:47:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:47:09,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081744886] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:47:09,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:47:09,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 09:47:09,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692431687] [2022-01-31 09:47:09,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:47:09,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 09:47:09,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:09,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 09:47:09,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:47:09,379 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 09:47:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:09,593 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-01-31 09:47:09,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:47:09,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 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 48 [2022-01-31 09:47:09,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:09,596 INFO L225 Difference]: With dead ends: 50 [2022-01-31 09:47:09,596 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 09:47:09,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-31 09:47:09,599 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:09,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 50 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:47:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 09:47:09,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 09:47:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-01-31 09:47:09,612 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 48 [2022-01-31 09:47:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:09,613 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-01-31 09:47:09,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 09:47:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-01-31 09:47:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 09:47:09,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:09,617 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 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] [2022-01-31 09:47:09,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 09:47:09,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:09,838 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:09,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:09,839 INFO L85 PathProgramCache]: Analyzing trace with hash 859300597, now seen corresponding path program 3 times [2022-01-31 09:47:09,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:09,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568295141] [2022-01-31 09:47:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:09,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:09,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:09,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 09:47:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:09,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 09:47:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:09,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 09:47:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-31 09:47:09,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:09,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568295141] [2022-01-31 09:47:09,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568295141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:09,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517807517] [2022-01-31 09:47:09,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:47:09,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:09,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:09,928 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) [2022-01-31 09:47:09,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 09:47:10,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 09:47:10,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:47:10,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 09:47:10,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-31 09:47:10,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:47:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-31 09:47:10,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517807517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:47:10,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:47:10,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 09:47:10,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449636664] [2022-01-31 09:47:10,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:47:10,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:47:10,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:10,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:47:10,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:47:10,212 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 09:47:10,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:10,304 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-01-31 09:47:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:47:10,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-01-31 09:47:10,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:10,306 INFO L225 Difference]: With dead ends: 55 [2022-01-31 09:47:10,306 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 09:47:10,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 09:47:10,307 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:10,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:47:10,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 09:47:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-31 09:47:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-31 09:47:10,317 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 66 [2022-01-31 09:47:10,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:10,318 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-31 09:47:10,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 09:47:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-31 09:47:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 09:47:10,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:10,321 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:47:10,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-31 09:47:10,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:10,540 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash 49480076, now seen corresponding path program 4 times [2022-01-31 09:47:10,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:10,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231561712] [2022-01-31 09:47:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:10,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:10,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:10,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 09:47:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:10,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 09:47:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:10,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 09:47:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-31 09:47:10,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:10,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231561712] [2022-01-31 09:47:10,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231561712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:10,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779668840] [2022-01-31 09:47:10,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:47:10,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:10,699 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) [2022-01-31 09:47:10,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 09:47:10,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:47:10,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:47:10,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:47:10,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-31 09:47:10,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:47:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-31 09:47:11,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779668840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:47:11,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:47:11,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-31 09:47:11,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081371609] [2022-01-31 09:47:11,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:47:11,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 09:47:11,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:11,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 09:47:11,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:47:11,025 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:11,333 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-01-31 09:47:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 09:47:11,334 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-01-31 09:47:11,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:11,335 INFO L225 Difference]: With dead ends: 66 [2022-01-31 09:47:11,335 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 09:47:11,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:47:11,336 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:11,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 40 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:47:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 09:47:11,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-31 09:47:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-01-31 09:47:11,341 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 72 [2022-01-31 09:47:11,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:11,341 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-01-31 09:47:11,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:11,341 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-01-31 09:47:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 09:47:11,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:11,342 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:47:11,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 09:47:11,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:11,557 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:11,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2077107966, now seen corresponding path program 5 times [2022-01-31 09:47:11,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:11,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435029137] [2022-01-31 09:47:11,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:11,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:11,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:11,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 09:47:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:11,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:47:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:11,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 09:47:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-01-31 09:47:11,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:11,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435029137] [2022-01-31 09:47:11,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435029137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:11,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338274310] [2022-01-31 09:47:11,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:47:11,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:11,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:11,735 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) [2022-01-31 09:47:11,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:47:12,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-31 09:47:12,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:47:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:47:12,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-01-31 09:47:12,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:47:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-01-31 09:47:12,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338274310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:47:12,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:47:12,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-01-31 09:47:12,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403488675] [2022-01-31 09:47:12,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:47:12,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 09:47:12,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 09:47:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-31 09:47:12,510 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:12,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:12,981 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-01-31 09:47:12,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 09:47:12,982 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 98 [2022-01-31 09:47:12,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:12,983 INFO L225 Difference]: With dead ends: 84 [2022-01-31 09:47:12,983 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 09:47:12,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 09:47:12,985 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:12,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 45 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:47:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 09:47:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-31 09:47:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-01-31 09:47:12,989 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 98 [2022-01-31 09:47:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:12,989 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-01-31 09:47:12,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-01-31 09:47:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 09:47:12,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:12,995 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:47:13,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 09:47:13,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 09:47:13,212 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:13,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:13,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1610204012, now seen corresponding path program 6 times [2022-01-31 09:47:13,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:13,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846459505] [2022-01-31 09:47:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:13,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:13,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:13,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 09:47:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:13,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:47:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:13,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 09:47:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2022-01-31 09:47:13,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:13,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846459505] [2022-01-31 09:47:13,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846459505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:13,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921751647] [2022-01-31 09:47:13,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:47:13,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:13,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:13,440 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) [2022-01-31 09:47:13,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:47:13,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-31 09:47:13,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:47:13,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 09:47:13,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 850 proven. 16 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2022-01-31 09:47:13,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:47:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2007 trivial. 0 not checked. [2022-01-31 09:47:14,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921751647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:47:14,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:47:14,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2022-01-31 09:47:14,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259040580] [2022-01-31 09:47:14,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:47:14,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:47:14,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:14,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:47:14,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:47:14,127 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:14,558 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-01-31 09:47:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 09:47:14,558 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 148 [2022-01-31 09:47:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:14,559 INFO L225 Difference]: With dead ends: 98 [2022-01-31 09:47:14,559 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 09:47:14,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 09:47:14,561 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:14,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 55 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:47:14,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 09:47:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-31 09:47:14,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-01-31 09:47:14,566 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 148 [2022-01-31 09:47:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:14,566 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-01-31 09:47:14,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:14,566 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-01-31 09:47:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 09:47:14,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:14,568 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:47:14,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 09:47:14,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 09:47:14,792 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:14,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:14,792 INFO L85 PathProgramCache]: Analyzing trace with hash -463648548, now seen corresponding path program 7 times [2022-01-31 09:47:14,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:14,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65577719] [2022-01-31 09:47:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:14,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:14,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:14,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 09:47:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:14,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 09:47:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:14,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-31 09:47:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:47:14,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65577719] [2022-01-31 09:47:14,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65577719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107898458] [2022-01-31 09:47:14,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:47:14,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:14,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:15,000 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) [2022-01-31 09:47:15,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:47:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:15,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 09:47:15,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:47:15,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:47:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:47:15,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107898458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:47:15,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:47:15,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-01-31 09:47:15,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414103613] [2022-01-31 09:47:15,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:47:15,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 09:47:15,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:15,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 09:47:15,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 09:47:15,768 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:16,261 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-01-31 09:47:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 09:47:16,261 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 162 [2022-01-31 09:47:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:16,262 INFO L225 Difference]: With dead ends: 127 [2022-01-31 09:47:16,262 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 09:47:16,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 09:47:16,264 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:16,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 47 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:47:16,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 09:47:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-01-31 09:47:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-01-31 09:47:16,270 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 162 [2022-01-31 09:47:16,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:16,270 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-01-31 09:47:16,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:16,271 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-01-31 09:47:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 09:47:16,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:16,272 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 28, 28, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:47:16,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 09:47:16,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 09:47:16,491 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:16,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:16,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1903557882, now seen corresponding path program 8 times [2022-01-31 09:47:16,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:16,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772574507] [2022-01-31 09:47:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:16,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:16,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:16,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 09:47:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:17,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 09:47:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:17,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-01-31 09:47:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:47:17,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:17,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772574507] [2022-01-31 09:47:17,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772574507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:17,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165273326] [2022-01-31 09:47:17,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:47:17,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:17,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:17,030 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:47:17,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 09:47:17,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:47:17,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:47:17,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 09:47:17,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:47:17,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:47:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:47:18,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165273326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:47:18,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:47:18,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-01-31 09:47:18,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048946743] [2022-01-31 09:47:18,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:47:18,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 09:47:18,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 09:47:18,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 09:47:18,593 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:20,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:20,115 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2022-01-31 09:47:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 09:47:20,115 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 192 [2022-01-31 09:47:20,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:20,116 INFO L225 Difference]: With dead ends: 187 [2022-01-31 09:47:20,116 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 09:47:20,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 09:47:20,120 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 163 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:20,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 42 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:47:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 09:47:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-01-31 09:47:20,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:20,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2022-01-31 09:47:20,127 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 192 [2022-01-31 09:47:20,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:20,127 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2022-01-31 09:47:20,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:20,128 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2022-01-31 09:47:20,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-01-31 09:47:20,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:20,130 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 42, 42, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:47:20,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 09:47:20,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 09:47:20,351 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash -866210890, now seen corresponding path program 9 times [2022-01-31 09:47:20,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:20,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563833838] [2022-01-31 09:47:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:20,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:21,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:21,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-31 09:47:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:21,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 09:47:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:21,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-01-31 09:47:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:47:21,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:21,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563833838] [2022-01-31 09:47:21,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563833838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:21,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303751815] [2022-01-31 09:47:21,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:47:21,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:21,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:21,840 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:47:21,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 09:47:22,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-31 09:47:22,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:47:22,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:47:22,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 850 proven. 100 refuted. 0 times theorem prover too weak. 4377 trivial. 0 not checked. [2022-01-31 09:47:23,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:47:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5327 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5227 trivial. 0 not checked. [2022-01-31 09:47:23,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303751815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:47:23,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:47:23,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 13, 13] total 84 [2022-01-31 09:47:23,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756184264] [2022-01-31 09:47:23,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:47:23,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 09:47:23,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 09:47:23,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2107, Invalid=4865, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 09:47:23,984 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:26,341 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2022-01-31 09:47:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 09:47:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 252 [2022-01-31 09:47:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:26,343 INFO L225 Difference]: With dead ends: 214 [2022-01-31 09:47:26,343 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 09:47:26,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5209 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6315, Invalid=20745, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 09:47:26,349 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 191 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:26,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 55 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:47:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 09:47:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2022-01-31 09:47:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 205 states have (on average 1.0146341463414634) internal successors, (208), 205 states have internal predecessors, (208), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2022-01-31 09:47:26,355 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 252 [2022-01-31 09:47:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:26,355 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2022-01-31 09:47:26,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.2738095238095237) internal successors, (191), 83 states have internal predecessors, (191), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2022-01-31 09:47:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 09:47:26,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:26,358 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 42, 42, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:47:26,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 09:47:26,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 09:47:26,571 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:26,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1775224468, now seen corresponding path program 10 times [2022-01-31 09:47:26,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:26,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704714229] [2022-01-31 09:47:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:26,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:27,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:27,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-31 09:47:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:27,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 09:47:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:27,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-01-31 09:47:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 2347 trivial. 0 not checked. [2022-01-31 09:47:27,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:27,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704714229] [2022-01-31 09:47:27,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704714229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:27,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866105187] [2022-01-31 09:47:27,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:47:27,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:27,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:27,996 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:47:28,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 09:47:28,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:47:28,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:47:28,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:47:28,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:47:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4784 trivial. 0 not checked. [2022-01-31 09:47:29,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:47:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5828 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4784 trivial. 0 not checked. [2022-01-31 09:47:29,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866105187] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:47:29,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:47:29,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 17, 17] total 93 [2022-01-31 09:47:29,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517372633] [2022-01-31 09:47:29,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:47:29,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 09:47:29,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:47:29,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 09:47:29,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2388, Invalid=6168, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 09:47:29,775 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:47:32,635 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2022-01-31 09:47:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 09:47:32,635 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 278 [2022-01-31 09:47:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:47:32,636 INFO L225 Difference]: With dead ends: 248 [2022-01-31 09:47:32,637 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 09:47:32,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6765 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7158, Invalid=26148, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 09:47:32,641 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 198 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:47:32,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 80 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:47:32,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 09:47:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-01-31 09:47:32,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:47:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2022-01-31 09:47:32,647 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 278 [2022-01-31 09:47:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:47:32,647 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2022-01-31 09:47:32,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.2580645161290325) internal successors, (210), 92 states have internal predecessors, (210), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:47:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2022-01-31 09:47:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-01-31 09:47:32,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:47:32,650 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:47:32,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 09:47:32,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 09:47:32,860 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:47:32,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:47:32,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1874673946, now seen corresponding path program 11 times [2022-01-31 09:47:32,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:47:32,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790021563] [2022-01-31 09:47:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:47:32,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:47:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:34,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:47:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:34,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 09:47:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:34,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 09:47:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:34,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2022-01-31 09:47:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:47:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12379 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8779 trivial. 0 not checked. [2022-01-31 09:47:34,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:47:34,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790021563] [2022-01-31 09:47:34,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790021563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:47:34,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877243964] [2022-01-31 09:47:34,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:47:34,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:47:34,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:47:34,348 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:47:34,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process