/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/reducercommutativity/sum05-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:45:12,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:45:12,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:45:12,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:45:12,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:45:12,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:45:12,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:45:12,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:45:12,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:45:12,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:45:12,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:45:12,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:45:12,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:45:12,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:45:12,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:45:12,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:45:12,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:45:12,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:45:12,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:45:12,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:45:12,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:45:12,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:45:12,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:45:12,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:45:12,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:45:12,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:45:12,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:45:12,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:45:12,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:45:12,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:45:12,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:45:12,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:45:12,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:45:12,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:45:12,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:45:12,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:45:12,207 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:45:12,220 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:45:12,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:45:12,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:45:12,222 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:45:12,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:45:12,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:45:12,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:45:12,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:45:12,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:45:12,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:45:12,223 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:45:12,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:45:12,223 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:45:12,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:45:12,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:45:12,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:45:12,224 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:45:12,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:45:12,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:45:12,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:45:12,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:45:12,225 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:45:12,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:45:12,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:45:12,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:45:12,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:45:12,528 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:45:12,528 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:45:12,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum05-2.i [2022-01-31 08:45:12,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ce6002a6/667e49ef65ff46c180f09439de539e2f/FLAGa143b2a76 [2022-01-31 08:45:13,052 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:45:13,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum05-2.i [2022-01-31 08:45:13,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ce6002a6/667e49ef65ff46c180f09439de539e2f/FLAGa143b2a76 [2022-01-31 08:45:13,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ce6002a6/667e49ef65ff46c180f09439de539e2f [2022-01-31 08:45:13,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:45:13,099 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:45:13,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:45:13,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:45:13,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:45:13,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:45:13" (1/1) ... [2022-01-31 08:45:13,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73391763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:45:13, skipping insertion in model container [2022-01-31 08:45:13,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:45:13" (1/1) ... [2022-01-31 08:45:13,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:45:13,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:45:13,338 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum05-2.i[1271,1284] [2022-01-31 08:45:13,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:45:13,350 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:45:13,386 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum05-2.i[1271,1284] [2022-01-31 08:45:13,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:45:13,399 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:45:13,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:45:13 WrapperNode [2022-01-31 08:45:13,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:45:13,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:45:13,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:45:13,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:45:13,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:45:13" (1/1) ... [2022-01-31 08:45:13,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:45:13" (1/1) ... [2022-01-31 08:45:13,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:45:13" (1/1) ... [2022-01-31 08:45:13,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:45:13" (1/1) ... [2022-01-31 08:45:13,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:45:13" (1/1) ... [2022-01-31 08:45:13,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:45:13" (1/1) ... [2022-01-31 08:45:13,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:45:13" (1/1) ... [2022-01-31 08:45:13,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:45:13,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:45:13,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:45:13,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:45:13,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:45:13" (1/1) ... [2022-01-31 08:45:13,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:45:13,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:13,480 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 08:45:13,491 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 08:45:13,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:45:13,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:45:13,515 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:45:13,515 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-01-31 08:45:13,515 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:45:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:45:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:45:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:45:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:45:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:45:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:45:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:45:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-01-31 08:45:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:45:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:45:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:45:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:45:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:45:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:45:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:45:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:45:13,579 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:45:13,581 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:45:13,787 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:45:13,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:45:13,792 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:45:13,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:45:13 BoogieIcfgContainer [2022-01-31 08:45:13,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:45:13,801 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:45:13,801 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:45:13,816 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:45:13,819 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:45:13" (1/1) ... [2022-01-31 08:45:13,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:45:13 BasicIcfg [2022-01-31 08:45:13,851 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:45:13,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:45:13,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:45:13,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:45:13,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:45:13" (1/4) ... [2022-01-31 08:45:13,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263f2397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:45:13, skipping insertion in model container [2022-01-31 08:45:13,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:45:13" (2/4) ... [2022-01-31 08:45:13,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263f2397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:45:13, skipping insertion in model container [2022-01-31 08:45:13,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:45:13" (3/4) ... [2022-01-31 08:45:13,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263f2397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:45:13, skipping insertion in model container [2022-01-31 08:45:13,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:45:13" (4/4) ... [2022-01-31 08:45:13,857 INFO L111 eAbstractionObserver]: Analyzing ICFG sum05-2.iJordan [2022-01-31 08:45:13,862 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:45:13,862 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:45:13,931 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:45:13,939 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 08:45:13,940 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:45:13,957 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 08:45:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:45:13,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:13,965 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 08:45:13,965 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:13,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:13,970 INFO L85 PathProgramCache]: Analyzing trace with hash 142417289, now seen corresponding path program 1 times [2022-01-31 08:45:13,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:13,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062581127] [2022-01-31 08:45:13,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:13,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:14,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:14,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:45:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:14,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:45:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:14,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:45:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:14,227 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 08:45:14,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:14,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062581127] [2022-01-31 08:45:14,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062581127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:45:14,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:45:14,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:45:14,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054144755] [2022-01-31 08:45:14,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:45:14,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:45:14,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:14,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:45:14,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:45:14,267 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 08:45:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:14,316 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-31 08:45:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:45:14,319 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 08:45:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:14,324 INFO L225 Difference]: With dead ends: 31 [2022-01-31 08:45:14,325 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 08:45:14,327 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 08:45:14,331 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 08:45:14,332 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 08:45:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 08:45:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 08:45:14,367 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 08:45:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-31 08:45:14,371 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2022-01-31 08:45:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:14,372 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-31 08:45:14,372 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 08:45:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-31 08:45:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:45:14,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:14,374 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 08:45:14,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:45:14,375 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1780278, now seen corresponding path program 1 times [2022-01-31 08:45:14,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:14,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152054380] [2022-01-31 08:45:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:14,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:14,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:14,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:45:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:14,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:45:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:14,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:45:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:14,518 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 08:45:14,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:14,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152054380] [2022-01-31 08:45:14,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152054380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:14,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743926677] [2022-01-31 08:45:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:14,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:14,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:14,523 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 08:45:14,553 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 08:45:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:14,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:45:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:14,725 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 08:45:14,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:45:14,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743926677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:45:14,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:45:14,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:45:14,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372238286] [2022-01-31 08:45:14,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:45:14,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:45:14,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:14,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:45:14,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:45:14,740 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 08:45:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:14,755 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 08:45:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:45:14,756 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 08:45:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:14,757 INFO L225 Difference]: With dead ends: 28 [2022-01-31 08:45:14,757 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 08:45:14,757 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 08:45:14,758 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 08:45:14,759 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 08:45:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 08:45:14,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 08:45:14,763 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 08:45:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 08:45:14,764 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2022-01-31 08:45:14,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:14,764 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 08:45:14,764 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 08:45:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 08:45:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 08:45:14,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:14,766 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 08:45:14,794 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 08:45:14,990 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 08:45:14,991 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:14,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:14,991 INFO L85 PathProgramCache]: Analyzing trace with hash 561300940, now seen corresponding path program 1 times [2022-01-31 08:45:14,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:14,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142189304] [2022-01-31 08:45:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:14,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:45:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 08:45:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:45:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,073 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 08:45:15,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:15,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142189304] [2022-01-31 08:45:15,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142189304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:15,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97956516] [2022-01-31 08:45:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:15,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:15,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:15,075 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 08:45:15,077 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 08:45:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:45:15,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:15,184 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 08:45:15,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:45:15,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97956516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:45:15,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:45:15,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-31 08:45:15,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539712171] [2022-01-31 08:45:15,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:45:15,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:45:15,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:45:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:45:15,186 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 08:45:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:15,193 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-01-31 08:45:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:45:15,194 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 08:45:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:15,195 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:45:15,195 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:45:15,195 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 08:45:15,196 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 08:45:15,196 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 08:45:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:45:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 08:45:15,199 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 08:45:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 08:45:15,200 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2022-01-31 08:45:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:15,201 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 08:45:15,201 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 08:45:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 08:45:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 08:45:15,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:15,202 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 08:45:15,227 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 08:45:15,419 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 08:45:15,420 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:15,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:15,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1061096375, now seen corresponding path program 1 times [2022-01-31 08:45:15,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:15,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366660354] [2022-01-31 08:45:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:15,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:45:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 08:45:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:45:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,483 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 08:45:15,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:15,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366660354] [2022-01-31 08:45:15,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366660354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:15,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512365367] [2022-01-31 08:45:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:15,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:15,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:15,485 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 08:45:15,494 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 08:45:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:45:15,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:15,632 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 08:45:15,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:45:15,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512365367] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:45:15,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:45:15,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:45:15,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431937067] [2022-01-31 08:45:15,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:45:15,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:45:15,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:15,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:45:15,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:45:15,641 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 08:45:15,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:15,658 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-31 08:45:15,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:45:15,659 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 08:45:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:15,660 INFO L225 Difference]: With dead ends: 30 [2022-01-31 08:45:15,660 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 08:45:15,661 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 08:45:15,664 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 08:45:15,665 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 08:45:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 08:45:15,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 08:45:15,673 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 08:45:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 08:45:15,675 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2022-01-31 08:45:15,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:15,676 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 08:45:15,677 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 08:45:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 08:45:15,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 08:45:15,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:15,683 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 08:45:15,711 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 08:45:15,903 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 08:45:15,904 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:15,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:15,905 INFO L85 PathProgramCache]: Analyzing trace with hash -619501722, now seen corresponding path program 1 times [2022-01-31 08:45:15,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:15,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186474267] [2022-01-31 08:45:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:15,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:45:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 08:45:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:45:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:15,986 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 08:45:15,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:15,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186474267] [2022-01-31 08:45:15,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186474267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:15,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741725531] [2022-01-31 08:45:15,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:15,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:15,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:15,988 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 08:45:16,015 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 08:45:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:16,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:45:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:16,187 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 08:45:16,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:45:16,291 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 08:45:16,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741725531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:45:16,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:45:16,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:45:16,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971128239] [2022-01-31 08:45:16,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:45:16,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:45:16,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:16,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:45:16,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:45:16,294 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 08:45:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:16,417 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-01-31 08:45:16,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:45:16,418 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 08:45:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:16,420 INFO L225 Difference]: With dead ends: 35 [2022-01-31 08:45:16,421 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 08:45:16,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 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 08:45:16,423 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 08:45:16,424 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 08:45:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 08:45:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 08:45:16,431 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 08:45:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-31 08:45:16,433 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2022-01-31 08:45:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:16,433 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-31 08:45:16,434 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 08:45:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-31 08:45:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 08:45:16,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:16,436 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 08:45:16,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 08:45:16,650 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 08:45:16,650 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:16,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1074871916, now seen corresponding path program 2 times [2022-01-31 08:45:16,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:16,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537610801] [2022-01-31 08:45:16,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:16,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:16,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:16,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 08:45:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:16,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 08:45:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:16,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:45:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:16,745 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 08:45:16,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:16,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537610801] [2022-01-31 08:45:16,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537610801] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:16,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178465491] [2022-01-31 08:45:16,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:45:16,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:16,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:16,748 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 08:45:16,750 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 08:45:16,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:45:16,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:45:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:45:16,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:16,950 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 08:45:16,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:45:17,062 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 08:45:17,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178465491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:45:17,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:45:17,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 10 [2022-01-31 08:45:17,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250485353] [2022-01-31 08:45:17,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:45:17,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 08:45:17,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:17,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 08:45:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 08:45:17,069 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 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 08:45:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:17,231 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-01-31 08:45:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 08:45:17,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 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 08:45:17,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:17,235 INFO L225 Difference]: With dead ends: 40 [2022-01-31 08:45:17,235 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 08:45:17,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-01-31 08:45:17,238 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:45:17,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 50 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:45:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 08:45:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-01-31 08:45:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 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 08:45:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-01-31 08:45:17,251 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 48 [2022-01-31 08:45:17,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:17,251 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-01-31 08:45:17,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 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 08:45:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-01-31 08:45:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 08:45:17,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:17,256 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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 08:45:17,274 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 08:45:17,456 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 08:45:17,457 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:17,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1934842389, now seen corresponding path program 3 times [2022-01-31 08:45:17,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:17,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176639594] [2022-01-31 08:45:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:17,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:17,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:17,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:45:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:17,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 08:45:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:17,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 08:45:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-31 08:45:17,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:17,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176639594] [2022-01-31 08:45:17,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176639594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:17,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298516574] [2022-01-31 08:45:17,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:45:17,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:17,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:17,568 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 08:45:17,595 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 08:45:17,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:45:17,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:45:17,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:45:17,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-31 08:45:17,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:45:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-31 08:45:17,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298516574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:45:17,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:45:17,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:45:17,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789551307] [2022-01-31 08:45:17,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:45:17,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:45:17,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:17,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:45:17,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:45:17,827 INFO L87 Difference]: Start difference. First operand 39 states and 43 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 08:45:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:17,913 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-01-31 08:45:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:45:17,913 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 56 [2022-01-31 08:45:17,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:17,915 INFO L225 Difference]: With dead ends: 45 [2022-01-31 08:45:17,915 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 08:45:17,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 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 08:45:17,916 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:45:17,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 37 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:45:17,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 08:45:17,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-01-31 08:45:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 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 08:45:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-01-31 08:45:17,925 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 56 [2022-01-31 08:45:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:17,925 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-01-31 08:45:17,925 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 08:45:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-01-31 08:45:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 08:45:17,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:17,927 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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 08:45:17,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 08:45:18,144 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 08:45:18,144 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:18,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:18,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1014287358, now seen corresponding path program 4 times [2022-01-31 08:45:18,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:18,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582538826] [2022-01-31 08:45:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:18,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:18,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:18,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:45:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:18,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 08:45:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:18,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 08:45:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-31 08:45:18,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:18,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582538826] [2022-01-31 08:45:18,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582538826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:18,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214630576] [2022-01-31 08:45:18,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:45:18,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:18,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:18,234 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 08:45:18,259 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 08:45:18,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:45:18,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:45:18,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:45:18,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-31 08:45:18,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:45:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-31 08:45:18,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214630576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:45:18,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:45:18,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-01-31 08:45:18,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110069965] [2022-01-31 08:45:18,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:45:18,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:45:18,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:18,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:45:18,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:45:18,494 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:45:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:18,591 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-01-31 08:45:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 08:45:18,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2022-01-31 08:45:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:18,594 INFO L225 Difference]: With dead ends: 51 [2022-01-31 08:45:18,594 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 08:45:18,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 08:45:18,595 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:45:18,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:45:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 08:45:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-31 08:45:18,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 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 08:45:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-01-31 08:45:18,611 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 62 [2022-01-31 08:45:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:18,611 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-01-31 08:45:18,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:45:18,612 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-01-31 08:45:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 08:45:18,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:18,612 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 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 08:45:18,630 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 08:45:18,819 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 08:45:18,820 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash 529073849, now seen corresponding path program 5 times [2022-01-31 08:45:18,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:18,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633634788] [2022-01-31 08:45:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:18,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:21,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:21,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:45:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:22,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 08:45:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:24,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 08:45:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 295 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:45:25,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:25,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633634788] [2022-01-31 08:45:25,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633634788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:25,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035332355] [2022-01-31 08:45:25,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:45:25,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:25,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:25,143 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 08:45:25,161 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 08:45:26,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-31 08:45:26,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:45:26,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 168 conjunts are in the unsatisfiable core [2022-01-31 08:45:26,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:26,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 08:45:27,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:27,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:27,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:27,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:27,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:27,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:27,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:27,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:27,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:27,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:27,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:45:27,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 542 treesize of output 223 [2022-01-31 08:45:28,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:28,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:28,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:28,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:28,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:28,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:28,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:28,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:29,037 INFO L353 Elim1Store]: treesize reduction 154, result has 32.5 percent of original size [2022-01-31 08:45:29,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 242 treesize of output 166 [2022-01-31 08:45:30,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:30,527 INFO L353 Elim1Store]: treesize reduction 200, result has 34.4 percent of original size [2022-01-31 08:45:30,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 305 treesize of output 366 [2022-01-31 08:45:33,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:33,112 INFO L353 Elim1Store]: treesize reduction 227, result has 25.6 percent of original size [2022-01-31 08:45:33,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 22 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 39 case distinctions, treesize of input 457 treesize of output 460 [2022-01-31 08:45:35,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:45:35,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:45:35,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:45:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:45:35,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:45:35,403 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-31 08:45:35,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 467 treesize of output 423 [2022-01-31 08:45:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:35,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:45:35,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 122 [2022-01-31 08:45:37,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:45:37,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 666 treesize of output 266 [2022-01-31 08:45:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 18 proven. 279 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:45:38,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:45:38,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035332355] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:38,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 08:45:38,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 53] total 80 [2022-01-31 08:45:38,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349722645] [2022-01-31 08:45:38,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 08:45:38,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 08:45:38,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:38,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 08:45:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=6393, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 08:45:38,975 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 80 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 74 states have internal predecessors, (100), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-31 08:45:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:46,927 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2022-01-31 08:45:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 08:45:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 74 states have internal predecessors, (100), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 80 [2022-01-31 08:45:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:46,930 INFO L225 Difference]: With dead ends: 80 [2022-01-31 08:45:46,930 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 08:45:46,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 47 SyntacticMatches, 22 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3713 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=511, Invalid=12829, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 08:45:46,935 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 3032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:45:46,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 239 Invalid, 3032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2894 Invalid, 0 Unknown, 64 Unchecked, 3.0s Time] [2022-01-31 08:45:46,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 08:45:46,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2022-01-31 08:45:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 60 states have internal predecessors, (64), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-31 08:45:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-01-31 08:45:46,941 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 80 [2022-01-31 08:45:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:46,941 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-01-31 08:45:46,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 74 states have internal predecessors, (100), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-31 08:45:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-01-31 08:45:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 08:45:46,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:46,942 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 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 08:45:46,954 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 08:45:47,148 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 08:45:47,149 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:47,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1783257514, now seen corresponding path program 6 times [2022-01-31 08:45:47,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:47,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022234767] [2022-01-31 08:45:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:47,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:47,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:47,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:45:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:47,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 08:45:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:47,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 08:45:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-01-31 08:45:47,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:47,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022234767] [2022-01-31 08:45:47,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022234767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:45:47,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:45:47,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 08:45:47,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607098149] [2022-01-31 08:45:47,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:45:47,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 08:45:47,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:47,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 08:45:47,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:45:47,265 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 08:45:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:47,357 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-01-31 08:45:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 08:45:47,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 82 [2022-01-31 08:45:47,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:47,359 INFO L225 Difference]: With dead ends: 47 [2022-01-31 08:45:47,359 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 08:45:47,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:45:47,360 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:45:47,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:45:47,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 08:45:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 08:45:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 08:45:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 08:45:47,362 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2022-01-31 08:45:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:47,362 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 08:45:47,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 08:45:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 08:45:47,363 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 08:45:47,365 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 08:45:47,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 08:45:47,369 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1] [2022-01-31 08:45:47,370 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 08:45:47,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:45:47 BasicIcfg [2022-01-31 08:45:47,373 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 08:45:47,374 INFO L158 Benchmark]: Toolchain (without parser) took 34274.93ms. Allocated memory was 197.1MB in the beginning and 336.6MB in the end (delta: 139.5MB). Free memory was 141.7MB in the beginning and 228.3MB in the end (delta: -86.6MB). Peak memory consumption was 53.0MB. Max. memory is 8.0GB. [2022-01-31 08:45:47,374 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 197.1MB. Free memory is still 158.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 08:45:47,374 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.45ms. Allocated memory is still 197.1MB. Free memory was 141.5MB in the beginning and 167.5MB in the end (delta: -26.0MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2022-01-31 08:45:47,374 INFO L158 Benchmark]: Boogie Preprocessor took 40.25ms. Allocated memory is still 197.1MB. Free memory was 167.5MB in the beginning and 165.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 08:45:47,375 INFO L158 Benchmark]: RCFGBuilder took 358.37ms. Allocated memory is still 197.1MB. Free memory was 165.9MB in the beginning and 153.9MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 08:45:47,375 INFO L158 Benchmark]: IcfgTransformer took 50.37ms. Allocated memory is still 197.1MB. Free memory was 153.9MB in the beginning and 152.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 08:45:47,376 INFO L158 Benchmark]: TraceAbstraction took 33521.14ms. Allocated memory was 197.1MB in the beginning and 336.6MB in the end (delta: 139.5MB). Free memory was 151.8MB in the beginning and 228.3MB in the end (delta: -76.5MB). Peak memory consumption was 64.0MB. Max. memory is 8.0GB. [2022-01-31 08:45:47,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 197.1MB. Free memory is still 158.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 296.45ms. Allocated memory is still 197.1MB. Free memory was 141.5MB in the beginning and 167.5MB in the end (delta: -26.0MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.25ms. Allocated memory is still 197.1MB. Free memory was 167.5MB in the beginning and 165.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 358.37ms. Allocated memory is still 197.1MB. Free memory was 165.9MB in the beginning and 153.9MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 50.37ms. Allocated memory is still 197.1MB. Free memory was 153.9MB in the beginning and 152.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 33521.14ms. Allocated memory was 197.1MB in the beginning and 336.6MB in the end (delta: 139.5MB). Free memory was 151.8MB in the beginning and 228.3MB in the end (delta: -76.5MB). Peak memory consumption was 64.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 50]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.4s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 229 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 212 mSDsluCounter, 635 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 64 IncrementalHoareTripleChecker+Unchecked, 385 mSDsCounter, 135 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3298 IncrementalHoareTripleChecker+Invalid, 3497 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 135 mSolverCounterUnsat, 250 mSDtfsCounter, 3298 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 841 GetRequests, 631 SyntacticMatches, 24 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3792 ImplicationChecksByTransitivity, 13.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=9, InterpolantAutomatonStates: 91, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 12 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 20.6s InterpolantComputationTime, 902 NumberOfCodeBlocks, 869 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1088 ConstructedInterpolants, 1 QuantifiedInterpolants, 19175 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1439 ConjunctsInSsa, 190 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 1212/1921 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-31 08:45:47,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...