/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/max05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:35:09,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:35:09,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:35:09,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:35:09,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:35:09,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:35:09,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:35:09,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:35:09,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:35:09,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:35:09,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:35:09,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:35:09,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:35:09,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:35:09,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:35:09,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:35:09,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:35:09,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:35:09,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:35:09,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:35:09,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:35:09,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:35:09,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:35:09,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:35:09,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:35:09,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:35:09,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:35:09,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:35:09,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:35:09,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:35:09,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:35:09,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:35:09,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:35:09,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:35:09,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:35:09,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:35:09,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:35:09,239 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:35:09,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:35:09,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:35:09,240 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:35:09,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:35:09,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:35:09,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:35:09,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:35:09,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:35:09,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:35:09,241 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:35:09,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:35:09,241 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:35:09,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:35:09,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:35:09,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:35:09,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:35:09,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:35:09,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:35:09,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:35:09,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:35:09,242 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:35:09,242 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:35:09,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:35:09,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:35:09,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:35:09,424 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:35:09,424 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:35:09,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max05-1.i [2022-01-31 08:35:09,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/928c6fb3a/2cc56bd5a3f14b31bfcee8a62306597e/FLAGb7eb5b422 [2022-01-31 08:35:09,840 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:35:09,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max05-1.i [2022-01-31 08:35:09,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/928c6fb3a/2cc56bd5a3f14b31bfcee8a62306597e/FLAGb7eb5b422 [2022-01-31 08:35:09,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/928c6fb3a/2cc56bd5a3f14b31bfcee8a62306597e [2022-01-31 08:35:09,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:35:09,859 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:35:09,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:35:09,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:35:09,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:35:09,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:35:09" (1/1) ... [2022-01-31 08:35:09,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d25b1ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:09, skipping insertion in model container [2022-01-31 08:35:09,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:35:09" (1/1) ... [2022-01-31 08:35:09,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:35:09,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:35:10,010 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/max05-1.i[1284,1297] [2022-01-31 08:35:10,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:35:10,017 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:35:10,030 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/max05-1.i[1284,1297] [2022-01-31 08:35:10,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:35:10,040 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:35:10,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:10 WrapperNode [2022-01-31 08:35:10,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:35:10,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:35:10,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:35:10,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:35:10,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:10" (1/1) ... [2022-01-31 08:35:10,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:10" (1/1) ... [2022-01-31 08:35:10,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:10" (1/1) ... [2022-01-31 08:35:10,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:10" (1/1) ... [2022-01-31 08:35:10,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:10" (1/1) ... [2022-01-31 08:35:10,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:10" (1/1) ... [2022-01-31 08:35:10,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:10" (1/1) ... [2022-01-31 08:35:10,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:35:10,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:35:10,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:35:10,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:35:10,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:10" (1/1) ... [2022-01-31 08:35:10,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:35:10,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:35:10,111 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 08:35:10,130 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 08:35:10,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:35:10,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:35:10,140 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:35:10,140 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-01-31 08:35:10,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:35:10,141 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:35:10,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:35:10,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:35:10,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:35:10,141 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:35:10,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:35:10,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:35:10,142 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-01-31 08:35:10,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:35:10,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:35:10,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:35:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:35:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:35:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:35:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:35:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:35:10,200 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:35:10,202 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:35:10,299 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:35:10,303 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:35:10,303 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:35:10,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:35:10 BoogieIcfgContainer [2022-01-31 08:35:10,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:35:10,305 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:35:10,305 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:35:10,306 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:35:10,308 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:35:10" (1/1) ... [2022-01-31 08:35:10,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:35:10 BasicIcfg [2022-01-31 08:35:10,322 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:35:10,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:35:10,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:35:10,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:35:10,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:35:09" (1/4) ... [2022-01-31 08:35:10,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228b982a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:35:10, skipping insertion in model container [2022-01-31 08:35:10,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:35:10" (2/4) ... [2022-01-31 08:35:10,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228b982a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:35:10, skipping insertion in model container [2022-01-31 08:35:10,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:35:10" (3/4) ... [2022-01-31 08:35:10,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228b982a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:35:10, skipping insertion in model container [2022-01-31 08:35:10,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:35:10" (4/4) ... [2022-01-31 08:35:10,328 INFO L111 eAbstractionObserver]: Analyzing ICFG max05-1.iJordan [2022-01-31 08:35:10,331 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:35:10,332 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:35:10,359 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:35:10,363 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 08:35:10,364 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:35:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 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 08:35:10,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:35:10,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:35:10,378 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 08:35:10,379 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:35:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:35:10,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1683381202, now seen corresponding path program 1 times [2022-01-31 08:35:10,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:35:10,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239514028] [2022-01-31 08:35:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:10,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:35:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:10,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:35:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:10,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:35:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:10,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:35:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:10,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:35:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:10,578 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 08:35:10,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:35:10,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239514028] [2022-01-31 08:35:10,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239514028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:35:10,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:35:10,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:35:10,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970597992] [2022-01-31 08:35:10,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:35:10,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:35:10,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:35:10,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:35:10,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:35:10,607 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 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 4 states, 4 states have (on average 3.75) 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 08:35:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:35:10,699 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-01-31 08:35:10,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:35:10,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 08:35:10,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:35:10,708 INFO L225 Difference]: With dead ends: 35 [2022-01-31 08:35:10,709 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 08:35:10,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:35:10,712 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 27 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:35:10,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 42 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:35:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 08:35:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 08:35:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 08:35:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-31 08:35:10,743 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 32 [2022-01-31 08:35:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:35:10,744 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-31 08:35:10,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) 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 08:35:10,744 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-31 08:35:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 08:35:10,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:35:10,746 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 08:35:10,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:35:10,746 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:35:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:35:10,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1839782542, now seen corresponding path program 1 times [2022-01-31 08:35:10,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:35:10,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166106592] [2022-01-31 08:35:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:10,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:35:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:10,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:35:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:10,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:35:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:10,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 08:35:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:10,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:35:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:10,852 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 08:35:10,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:35:10,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166106592] [2022-01-31 08:35:10,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166106592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:35:10,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454506363] [2022-01-31 08:35:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:10,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:35:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:35:10,855 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 08:35:10,860 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 08:35:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:35:10,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:35:11,007 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 08:35:11,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:35:11,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454506363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:35:11,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:35:11,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-31 08:35:11,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177313950] [2022-01-31 08:35:11,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:35:11,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:35:11,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:35:11,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:35:11,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:35:11,010 INFO L87 Difference]: Start difference. First operand 29 states and 34 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 08:35:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:35:11,018 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-01-31 08:35:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:35:11,019 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 08:35:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:35:11,019 INFO L225 Difference]: With dead ends: 33 [2022-01-31 08:35:11,019 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 08:35:11,020 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 08:35:11,021 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:35:11,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 58 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:35:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 08:35:11,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-01-31 08:35:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 08:35:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-01-31 08:35:11,025 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 34 [2022-01-31 08:35:11,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:35:11,025 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-01-31 08:35:11,025 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 08:35:11,025 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-01-31 08:35:11,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 08:35:11,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:35:11,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 08:35:11,047 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 08:35:11,240 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 08:35:11,240 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:35:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:35:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash -956413876, now seen corresponding path program 1 times [2022-01-31 08:35:11,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:35:11,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177802580] [2022-01-31 08:35:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:11,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:35:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:11,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:35:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:11,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:35:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:11,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:35:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:11,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:35:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 08:35:11,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:35:11,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177802580] [2022-01-31 08:35:11,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177802580] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:35:11,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179923040] [2022-01-31 08:35:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:11,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:35:11,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:35:11,356 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 08:35:11,357 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 08:35:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:11,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:35:11,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:35:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:35:11,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:35:11,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179923040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:35:11,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:35:11,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:35:11,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099589723] [2022-01-31 08:35:11,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:35:11,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:35:11,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:35:11,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:35:11,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:35:11,504 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 08:35:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:35:11,518 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-01-31 08:35:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:35:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 46 [2022-01-31 08:35:11,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:35:11,522 INFO L225 Difference]: With dead ends: 32 [2022-01-31 08:35:11,522 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 08:35:11,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 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 08:35:11,525 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 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 08:35:11,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:35:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 08:35:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-01-31 08:35:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 08:35:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-01-31 08:35:11,537 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 46 [2022-01-31 08:35:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:35:11,538 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-01-31 08:35:11,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 08:35:11,539 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-01-31 08:35:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 08:35:11,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:35:11,539 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 08:35:11,558 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 08:35:11,751 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 08:35:11,752 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:35:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:35:11,752 INFO L85 PathProgramCache]: Analyzing trace with hash 60538376, now seen corresponding path program 1 times [2022-01-31 08:35:11,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:35:11,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153537467] [2022-01-31 08:35:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:11,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:35:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:11,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:35:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:11,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:35:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:11,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:35:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:11,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 08:35:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:35:11,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:35:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153537467] [2022-01-31 08:35:11,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153537467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:35:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87741615] [2022-01-31 08:35:11,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:11,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:35:11,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:35:11,832 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 08:35:11,846 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 08:35:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:11,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:35:11,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:35:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:35:11,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:35:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:35:12,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87741615] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:35:12,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:35:12,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:35:12,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223878857] [2022-01-31 08:35:12,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:35:12,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:35:12,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:35:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:35:12,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:35:12,078 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 08:35:12,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:35:12,162 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-01-31 08:35:12,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:35:12,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 48 [2022-01-31 08:35:12,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:35:12,165 INFO L225 Difference]: With dead ends: 37 [2022-01-31 08:35:12,165 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 08:35:12,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 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 08:35:12,169 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:35:12,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:35:12,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 08:35:12,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-31 08:35:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 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 08:35:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-01-31 08:35:12,184 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 48 [2022-01-31 08:35:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:35:12,184 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-01-31 08:35:12,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 08:35:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-01-31 08:35:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 08:35:12,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:35:12,185 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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 08:35:12,207 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 08:35:12,386 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 08:35:12,386 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:35:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:35:12,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1594696942, now seen corresponding path program 2 times [2022-01-31 08:35:12,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:35:12,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916821593] [2022-01-31 08:35:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:12,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:35:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:12,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:35:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:12,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 08:35:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:12,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 08:35:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:12,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 08:35:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-31 08:35:12,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:35:12,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916821593] [2022-01-31 08:35:12,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916821593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:35:12,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969489426] [2022-01-31 08:35:12,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:35:12,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:35:12,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:35:12,459 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 08:35:12,474 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 08:35:12,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:35:12,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:35:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:35:12,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:35:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:35:12,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:35:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:35:12,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969489426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:35:12,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:35:12,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 10 [2022-01-31 08:35:12,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994681746] [2022-01-31 08:35:12,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:35:12,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 08:35:12,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:35:12,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 08:35:12,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 08:35:12,747 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 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 08:35:12,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:35:12,865 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-01-31 08:35:12,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 08:35:12,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 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 54 [2022-01-31 08:35:12,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:35:12,866 INFO L225 Difference]: With dead ends: 46 [2022-01-31 08:35:12,867 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 08:35:12,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 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 08:35:12,868 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:35:12,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 47 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:35:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 08:35:12,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-01-31 08:35:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 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 08:35:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-01-31 08:35:12,876 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 54 [2022-01-31 08:35:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:35:12,877 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-01-31 08:35:12,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 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 08:35:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-01-31 08:35:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 08:35:12,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:35:12,886 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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 08:35:12,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:35:13,086 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 08:35:13,087 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:35:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:35:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash -830313110, now seen corresponding path program 3 times [2022-01-31 08:35:13,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:35:13,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835288816] [2022-01-31 08:35:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:13,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:35:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:13,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:35:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:13,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:35:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:13,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 08:35:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:13,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 08:35:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-01-31 08:35:13,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:35:13,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835288816] [2022-01-31 08:35:13,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835288816] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:35:13,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130285270] [2022-01-31 08:35:13,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:35:13,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:35:13,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:35:13,192 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 08:35:13,219 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 08:35:13,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:35:13,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:35:13,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:35:13,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:35:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-31 08:35:13,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:35:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-01-31 08:35:13,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130285270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:35:13,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:35:13,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:35:13,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705437149] [2022-01-31 08:35:13,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:35:13,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:35:13,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:35:13,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:35:13,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:35:13,419 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 08:35:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:35:13,498 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-01-31 08:35:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:35:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 68 [2022-01-31 08:35:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:35:13,499 INFO L225 Difference]: With dead ends: 49 [2022-01-31 08:35:13,499 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 08:35:13,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 141 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 08:35:13,500 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:35:13,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:35:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 08:35:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-01-31 08:35:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 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 08:35:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-01-31 08:35:13,503 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 68 [2022-01-31 08:35:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:35:13,503 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-01-31 08:35:13,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 08:35:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-01-31 08:35:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 08:35:13,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:35:13,504 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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 08:35:13,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 08:35:13,707 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 08:35:13,708 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:35:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:35:13,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1148101790, now seen corresponding path program 4 times [2022-01-31 08:35:13,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:35:13,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883742707] [2022-01-31 08:35:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:13,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:35:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:13,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:35:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:13,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:35:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:13,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 08:35:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:13,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 08:35:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-31 08:35:13,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:35:13,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883742707] [2022-01-31 08:35:13,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883742707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:35:13,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316789675] [2022-01-31 08:35:13,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:35:13,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:35:13,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:35:13,822 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 08:35:13,823 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 08:35:13,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:35:13,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:35:13,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:35:13,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:35:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 08:35:13,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:35:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-31 08:35:14,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316789675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:35:14,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:35:14,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-01-31 08:35:14,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662793953] [2022-01-31 08:35:14,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:35:14,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:35:14,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:35:14,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:35:14,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:35:14,045 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 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 08:35:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:35:14,146 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-01-31 08:35:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 08:35:14,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 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 74 [2022-01-31 08:35:14,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:35:14,147 INFO L225 Difference]: With dead ends: 61 [2022-01-31 08:35:14,147 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 08:35:14,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 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 08:35:14,148 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:35:14,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 44 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:35:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 08:35:14,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-01-31 08:35:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 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 08:35:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2022-01-31 08:35:14,151 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 74 [2022-01-31 08:35:14,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:35:14,151 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2022-01-31 08:35:14,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 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 08:35:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2022-01-31 08:35:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 08:35:14,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:35:14,152 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 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 08:35:14,169 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 08:35:14,359 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 08:35:14,360 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:35:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:35:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash -382299604, now seen corresponding path program 5 times [2022-01-31 08:35:14,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:35:14,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340089000] [2022-01-31 08:35:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:14,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:35:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:14,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:35:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:14,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:35:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:14,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:35:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:14,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-31 08:35:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 13 proven. 379 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-31 08:35:14,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:35:14,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340089000] [2022-01-31 08:35:14,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340089000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:35:14,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522084732] [2022-01-31 08:35:14,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:35:14,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:35:14,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:35:14,926 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 08:35:14,927 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 08:35:15,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-31 08:35:15,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:35:15,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-31 08:35:15,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:35:15,355 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 08:35:16,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:16,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:35:16,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 28 [2022-01-31 08:35:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 242 proven. 197 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-31 08:35:16,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:35:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 108 proven. 303 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-01-31 08:35:18,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522084732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:35:18,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:35:18,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29, 22] total 57 [2022-01-31 08:35:18,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831741923] [2022-01-31 08:35:18,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:35:18,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 08:35:18,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:35:18,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 08:35:18,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2799, Unknown=1, NotChecked=0, Total=3192 [2022-01-31 08:35:18,390 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 57 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 53 states have internal predecessors, (135), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 08:35:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:35:43,567 INFO L93 Difference]: Finished difference Result 284 states and 366 transitions. [2022-01-31 08:35:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-01-31 08:35:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 53 states have internal predecessors, (135), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 110 [2022-01-31 08:35:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:35:43,570 INFO L225 Difference]: With dead ends: 284 [2022-01-31 08:35:43,570 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 08:35:43,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 229 SyntacticMatches, 6 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15077 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=6189, Invalid=37691, Unknown=10, NotChecked=0, Total=43890 [2022-01-31 08:35:43,581 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 408 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1981 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:35:43,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 171 Invalid, 2786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 687 Invalid, 0 Unknown, 1981 Unchecked, 0.5s Time] [2022-01-31 08:35:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 08:35:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 124. [2022-01-31 08:35:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 114 states have (on average 1.2280701754385965) internal successors, (140), 114 states have internal predecessors, (140), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 08:35:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 154 transitions. [2022-01-31 08:35:43,589 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 154 transitions. Word has length 110 [2022-01-31 08:35:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:35:43,589 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 154 transitions. [2022-01-31 08:35:43,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 53 states have internal predecessors, (135), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 08:35:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 154 transitions. [2022-01-31 08:35:43,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 08:35:43,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:35:43,590 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 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, 1] [2022-01-31 08:35:43,610 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 08:35:43,804 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 08:35:43,805 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:35:43,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:35:43,805 INFO L85 PathProgramCache]: Analyzing trace with hash -101949715, now seen corresponding path program 1 times [2022-01-31 08:35:43,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:35:43,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501751954] [2022-01-31 08:35:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:43,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:35:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:44,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:35:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:44,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:35:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:44,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:35:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:44,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-31 08:35:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 114 proven. 347 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:35:44,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:35:44,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501751954] [2022-01-31 08:35:44,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501751954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:35:44,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731822308] [2022-01-31 08:35:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:35:44,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:35:44,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:35:44,872 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 08:35:44,872 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 08:35:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:35:44,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 91 conjunts are in the unsatisfiable core [2022-01-31 08:35:44,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:35:46,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:35:46,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:35:46,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:35:46,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 81 [2022-01-31 08:35:46,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:35:46,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2022-01-31 08:35:46,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:35:46,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:35:46,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2022-01-31 08:35:46,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:35:46,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:35:46,722 INFO L353 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-01-31 08:35:46,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 53 [2022-01-31 08:35:46,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:35:46,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:35:46,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:35:46,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 44 [2022-01-31 08:35:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 232 proven. 242 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-31 08:35:47,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:35:57,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2022-01-31 08:35:57,034 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-01-31 08:35:57,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 742 treesize of output 1 [2022-01-31 08:35:59,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:35:59,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 115 [2022-01-31 08:35:59,267 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-31 08:35:59,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 363 treesize of output 353 [2022-01-31 08:35:59,372 INFO L353 Elim1Store]: treesize reduction 120, result has 46.9 percent of original size [2022-01-31 08:35:59,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 414 treesize of output 468 [2022-01-31 08:35:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 265 proven. 183 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-01-31 08:35:59,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731822308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:35:59,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:35:59,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 42, 37] total 107 [2022-01-31 08:35:59,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453370447] [2022-01-31 08:35:59,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:35:59,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 08:35:59,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:35:59,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 08:36:00,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=10825, Unknown=4, NotChecked=0, Total=11342 [2022-01-31 08:36:00,000 INFO L87 Difference]: Start difference. First operand 124 states and 154 transitions. Second operand has 107 states, 104 states have (on average 1.9326923076923077) internal successors, (201), 102 states have internal predecessors, (201), 6 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-31 08:36:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:36:19,338 INFO L93 Difference]: Finished difference Result 618 states and 869 transitions. [2022-01-31 08:36:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2022-01-31 08:36:19,339 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 104 states have (on average 1.9326923076923077) internal successors, (201), 102 states have internal predecessors, (201), 6 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 110 [2022-01-31 08:36:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:36:19,343 INFO L225 Difference]: With dead ends: 618 [2022-01-31 08:36:19,343 INFO L226 Difference]: Without dead ends: 569 [2022-01-31 08:36:19,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27111 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=4401, Invalid=77104, Unknown=5, NotChecked=0, Total=81510 [2022-01-31 08:36:19,349 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 489 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 9024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6720 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:36:19,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 336 Invalid, 9024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2187 Invalid, 0 Unknown, 6720 Unchecked, 1.1s Time] [2022-01-31 08:36:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-31 08:36:19,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 466. [2022-01-31 08:36:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 438 states have (on average 1.2899543378995433) internal successors, (565), 450 states have internal predecessors, (565), 11 states have call successors, (11), 5 states have call predecessors, (11), 16 states have return successors, (91), 10 states have call predecessors, (91), 10 states have call successors, (91) [2022-01-31 08:36:19,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 667 transitions. [2022-01-31 08:36:19,389 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 667 transitions. Word has length 110 [2022-01-31 08:36:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:36:19,389 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 667 transitions. [2022-01-31 08:36:19,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 104 states have (on average 1.9326923076923077) internal successors, (201), 102 states have internal predecessors, (201), 6 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-31 08:36:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 667 transitions. [2022-01-31 08:36:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 08:36:19,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:36:19,393 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:36:19,412 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 08:36:19,593 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 08:36:19,593 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:36:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:36:19,594 INFO L85 PathProgramCache]: Analyzing trace with hash -298463220, now seen corresponding path program 2 times [2022-01-31 08:36:19,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:36:19,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030680829] [2022-01-31 08:36:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:36:19,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:36:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:20,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:36:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:20,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:36:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:20,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:36:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:21,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-31 08:36:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:36:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 18 proven. 486 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 08:36:21,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:36:21,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030680829] [2022-01-31 08:36:21,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030680829] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:36:21,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419418191] [2022-01-31 08:36:21,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:36:21,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:36:21,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:36:21,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:36:21,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 08:36:22,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:36:22,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:36:22,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 155 conjunts are in the unsatisfiable core [2022-01-31 08:36:22,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:36:22,283 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 13 treesize of output 9 [2022-01-31 08:37:09,560 INFO L353 Elim1Store]: treesize reduction 294, result has 10.6 percent of original size [2022-01-31 08:37:09,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 67 [2022-01-31 08:37:11,194 INFO L353 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2022-01-31 08:37:11,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 61 [2022-01-31 08:37:11,348 INFO L353 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2022-01-31 08:37:11,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 61 [2022-01-31 08:37:11,506 INFO L353 Elim1Store]: treesize reduction 135, result has 12.3 percent of original size [2022-01-31 08:37:11,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 52 [2022-01-31 08:37:11,750 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 08:37:11,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 38 [2022-01-31 08:37:11,876 INFO L353 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-01-31 08:37:11,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 38 [2022-01-31 08:38:31,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:38:31,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 65 [2022-01-31 08:38:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 1 proven. 518 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:38:31,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:39:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 18 proven. 466 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 08:39:38,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419418191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:39:38,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:39:38,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 61, 48] total 161 [2022-01-31 08:39:38,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384842333] [2022-01-31 08:39:38,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:39:38,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-01-31 08:39:38,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:39:38,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-01-31 08:39:38,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=937, Invalid=24732, Unknown=91, NotChecked=0, Total=25760 [2022-01-31 08:39:38,684 INFO L87 Difference]: Start difference. First operand 466 states and 667 transitions. Second operand has 161 states, 157 states have (on average 1.7006369426751593) internal successors, (267), 149 states have internal predecessors, (267), 9 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 08:44:06,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:44:06,686 INFO L93 Difference]: Finished difference Result 712 states and 1095 transitions. [2022-01-31 08:44:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-31 08:44:06,687 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 157 states have (on average 1.7006369426751593) internal successors, (267), 149 states have internal predecessors, (267), 9 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 110 [2022-01-31 08:44:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:44:06,690 INFO L225 Difference]: With dead ends: 712 [2022-01-31 08:44:06,691 INFO L226 Difference]: Without dead ends: 700 [2022-01-31 08:44:06,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22954 ImplicationChecksByTransitivity, 460.2s TimeCoverageRelationStatistics Valid=2230, Invalid=70169, Unknown=231, NotChecked=0, Total=72630 [2022-01-31 08:44:06,694 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 3776 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 5473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 3776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1620 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:44:06,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 635 Invalid, 5473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 3776 Invalid, 0 Unknown, 1620 Unchecked, 2.6s Time] [2022-01-31 08:44:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-01-31 08:44:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 669. [2022-01-31 08:44:06,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 625 states have (on average 1.2752) internal successors, (797), 644 states have internal predecessors, (797), 20 states have call successors, (20), 8 states have call predecessors, (20), 23 states have return successors, (211), 16 states have call predecessors, (211), 19 states have call successors, (211) [2022-01-31 08:44:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1028 transitions. [2022-01-31 08:44:06,743 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1028 transitions. Word has length 110 [2022-01-31 08:44:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:44:06,743 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1028 transitions. [2022-01-31 08:44:06,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 157 states have (on average 1.7006369426751593) internal successors, (267), 149 states have internal predecessors, (267), 9 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 08:44:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1028 transitions. [2022-01-31 08:44:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 08:44:06,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:44:06,758 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 12, 5, 5, 4, 4, 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] [2022-01-31 08:44:06,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 08:44:06,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 08:44:06,977 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:44:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:44:06,977 INFO L85 PathProgramCache]: Analyzing trace with hash -804021845, now seen corresponding path program 3 times [2022-01-31 08:44:06,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:44:06,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445610502] [2022-01-31 08:44:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:44:06,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:44:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:07,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:44:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:07,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:44:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:07,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:44:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:07,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-31 08:44:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 233 proven. 230 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-31 08:44:07,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:44:07,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445610502] [2022-01-31 08:44:07,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445610502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:44:07,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104608100] [2022-01-31 08:44:07,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:44:07,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:44:07,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:44:07,920 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:44:07,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 08:44:08,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-31 08:44:08,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:44:08,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-31 08:44:08,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:44:08,607 INFO L353 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2022-01-31 08:44:08,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-31 08:44:08,657 INFO L353 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2022-01-31 08:44:08,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-31 08:44:08,691 INFO L353 Elim1Store]: treesize reduction 129, result has 25.0 percent of original size [2022-01-31 08:44:08,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 62 [2022-01-31 08:44:08,857 INFO L353 Elim1Store]: treesize reduction 274, result has 17.7 percent of original size [2022-01-31 08:44:08,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 80 treesize of output 96 [2022-01-31 08:44:15,475 INFO L353 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2022-01-31 08:44:15,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 36 [2022-01-31 08:44:51,055 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-01-31 08:44:51,057 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2022-01-31 08:44:51,059 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 101 [2022-01-31 08:44:51,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 08:44:51,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 08:44:51,258 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 46 more [2022-01-31 08:44:51,262 INFO L158 Benchmark]: Toolchain (without parser) took 581402.54ms. Allocated memory was 203.4MB in the beginning and 249.6MB in the end (delta: 46.1MB). Free memory was 155.0MB in the beginning and 51.1MB in the end (delta: 103.9MB). Peak memory consumption was 150.3MB. Max. memory is 8.0GB. [2022-01-31 08:44:51,262 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 203.4MB. Free memory was 171.8MB in the beginning and 171.8MB in the end (delta: 75.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 08:44:51,262 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.97ms. Allocated memory is still 203.4MB. Free memory was 154.8MB in the beginning and 180.0MB in the end (delta: -25.2MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. [2022-01-31 08:44:51,262 INFO L158 Benchmark]: Boogie Preprocessor took 38.18ms. Allocated memory is still 203.4MB. Free memory was 180.0MB in the beginning and 178.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 08:44:51,262 INFO L158 Benchmark]: RCFGBuilder took 224.44ms. Allocated memory is still 203.4MB. Free memory was 178.5MB in the beginning and 167.2MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 08:44:51,262 INFO L158 Benchmark]: IcfgTransformer took 17.46ms. Allocated memory is still 203.4MB. Free memory was 167.2MB in the beginning and 165.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 08:44:51,263 INFO L158 Benchmark]: TraceAbstraction took 580937.70ms. Allocated memory was 203.4MB in the beginning and 249.6MB in the end (delta: 46.1MB). Free memory was 165.3MB in the beginning and 51.1MB in the end (delta: 114.2MB). Peak memory consumption was 161.3MB. Max. memory is 8.0GB. [2022-01-31 08:44:51,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 203.4MB. Free memory was 171.8MB in the beginning and 171.8MB in the end (delta: 75.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 174.97ms. Allocated memory is still 203.4MB. Free memory was 154.8MB in the beginning and 180.0MB in the end (delta: -25.2MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.18ms. Allocated memory is still 203.4MB. Free memory was 180.0MB in the beginning and 178.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 224.44ms. Allocated memory is still 203.4MB. Free memory was 178.5MB in the beginning and 167.2MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 17.46ms. Allocated memory is still 203.4MB. Free memory was 167.2MB in the beginning and 165.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 580937.70ms. Allocated memory was 203.4MB in the beginning and 249.6MB in the end (delta: 46.1MB). Free memory was 165.3MB in the beginning and 51.1MB in the end (delta: 114.2MB). Peak memory consumption was 161.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...