/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/sum20-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:47:35,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:47:35,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:47:35,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:47:35,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:47:35,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:47:35,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:47:35,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:47:35,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:47:35,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:47:35,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:47:35,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:47:35,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:47:35,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:47:35,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:47:35,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:47:35,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:47:35,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:47:35,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:47:35,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:47:35,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:47:35,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:47:35,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:47:35,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:47:35,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:47:35,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:47:35,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:47:35,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:47:35,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:47:35,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:47:35,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:47:35,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:47:35,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:47:35,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:47:35,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:47:35,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:47:35,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:47:35,847 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:47:35,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:47:35,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:47:35,849 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:47:35,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:47:35,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:47:35,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:47:35,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:47:35,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:47:35,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:47:35,850 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:47:35,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:47:35,850 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:47:35,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:47:35,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:47:35,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:47:35,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:47:35,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:47:35,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:47:35,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:47:35,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:47:35,852 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:47:35,852 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:47:36,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:47:36,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:47:36,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:47:36,074 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:47:36,074 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:47:36,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum20-2.i [2022-01-31 08:47:36,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49dd55d10/a95aa9810b1a4d109b546c98c39ea83e/FLAGcebd0d89a [2022-01-31 08:47:36,450 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:47:36,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum20-2.i [2022-01-31 08:47:36,470 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49dd55d10/a95aa9810b1a4d109b546c98c39ea83e/FLAGcebd0d89a [2022-01-31 08:47:36,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49dd55d10/a95aa9810b1a4d109b546c98c39ea83e [2022-01-31 08:47:36,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:47:36,897 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:47:36,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:47:36,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:47:36,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:47:36,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:47:36" (1/1) ... [2022-01-31 08:47:36,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c93845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:47:36, skipping insertion in model container [2022-01-31 08:47:36,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:47:36" (1/1) ... [2022-01-31 08:47:36,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:47:36,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:47:37,069 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/sum20-2.i[1277,1290] [2022-01-31 08:47:37,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:47:37,076 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:47:37,090 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/sum20-2.i[1277,1290] [2022-01-31 08:47:37,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:47:37,101 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:47:37,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:47:37 WrapperNode [2022-01-31 08:47:37,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:47:37,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:47:37,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:47:37,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:47:37,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:47:37" (1/1) ... [2022-01-31 08:47:37,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:47:37" (1/1) ... [2022-01-31 08:47:37,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:47:37" (1/1) ... [2022-01-31 08:47:37,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:47:37" (1/1) ... [2022-01-31 08:47:37,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:47:37" (1/1) ... [2022-01-31 08:47:37,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:47:37" (1/1) ... [2022-01-31 08:47:37,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:47:37" (1/1) ... [2022-01-31 08:47:37,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:47:37,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:47:37,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:47:37,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:47:37,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:47:37" (1/1) ... [2022-01-31 08:47:37,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:47:37,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:37,167 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 08:47:37,168 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 08:47:37,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:47:37,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:47:37,194 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:47:37,194 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-01-31 08:47:37,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:47:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:47:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:47:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:47:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:47:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:47:37,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:47:37,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:47:37,195 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-01-31 08:47:37,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:47:37,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:47:37,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:47:37,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:47:37,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:47:37,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:47:37,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:47:37,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:47:37,255 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:47:37,257 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:47:37,395 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:47:37,399 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:47:37,399 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:47:37,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:47:37 BoogieIcfgContainer [2022-01-31 08:47:37,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:47:37,425 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:47:37,425 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:47:37,425 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:47:37,427 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:47:37" (1/1) ... [2022-01-31 08:47:37,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:47:37 BasicIcfg [2022-01-31 08:47:37,439 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:47:37,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:47:37,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:47:37,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:47:37,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:47:36" (1/4) ... [2022-01-31 08:47:37,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4adda870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:47:37, skipping insertion in model container [2022-01-31 08:47:37,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:47:37" (2/4) ... [2022-01-31 08:47:37,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4adda870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:47:37, skipping insertion in model container [2022-01-31 08:47:37,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:47:37" (3/4) ... [2022-01-31 08:47:37,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4adda870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:47:37, skipping insertion in model container [2022-01-31 08:47:37,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:47:37" (4/4) ... [2022-01-31 08:47:37,444 INFO L111 eAbstractionObserver]: Analyzing ICFG sum20-2.iJordan [2022-01-31 08:47:37,447 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:47:37,447 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:47:37,491 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:47:37,496 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 08:47:37,497 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:47:37,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:47:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:47:37,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:37,527 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 08:47:37,527 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:37,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash 142417289, now seen corresponding path program 1 times [2022-01-31 08:47:37,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:37,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768271332] [2022-01-31 08:47:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:37,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:37,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:37,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:47:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:37,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:47:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:37,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:47:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:37,723 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 08:47:37,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:37,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768271332] [2022-01-31 08:47:37,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768271332] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:47:37,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:47:37,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:47:37,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146229245] [2022-01-31 08:47:37,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:47:37,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:47:37,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:37,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:47:37,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:47:37,749 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:47:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:37,792 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-31 08:47:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:47:37,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 08:47:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:37,800 INFO L225 Difference]: With dead ends: 31 [2022-01-31 08:47:37,800 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 08:47:37,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:47:37,807 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:37,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:47:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 08:47:37,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 08:47:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:47:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-31 08:47:37,834 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2022-01-31 08:47:37,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:37,835 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-31 08:47:37,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:47:37,835 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-31 08:47:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:47:37,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:37,836 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 08:47:37,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:47:37,837 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:37,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1780278, now seen corresponding path program 1 times [2022-01-31 08:47:37,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:37,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220860455] [2022-01-31 08:47:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:37,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:37,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:37,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:47:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:37,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:47:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:37,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:47:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:47:37,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:37,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220860455] [2022-01-31 08:47:37,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220860455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:47:37,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900395957] [2022-01-31 08:47:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:37,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:47:37,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:37,938 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 08:47:37,939 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 08:47:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:47:38,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:47:38,069 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 08:47:38,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:47:38,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900395957] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:47:38,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:47:38,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:47:38,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118630866] [2022-01-31 08:47:38,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:47:38,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:47:38,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:38,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:47:38,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:47:38,072 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:47:38,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:38,084 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 08:47:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:47:38,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 08:47:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:38,085 INFO L225 Difference]: With dead ends: 28 [2022-01-31 08:47:38,085 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 08:47:38,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:47:38,086 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:38,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:47:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 08:47:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 08:47:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:47:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 08:47:38,097 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2022-01-31 08:47:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:38,098 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 08:47:38,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:47:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 08:47:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 08:47:38,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:38,099 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 08:47:38,122 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 08:47:38,311 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 08:47:38,312 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:38,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash 561300940, now seen corresponding path program 1 times [2022-01-31 08:47:38,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:38,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002458172] [2022-01-31 08:47:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:38,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:47:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 08:47:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:47:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,416 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 08:47:38,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:38,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002458172] [2022-01-31 08:47:38,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002458172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:47:38,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88431677] [2022-01-31 08:47:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:38,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:47:38,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:38,420 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 08:47:38,421 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 08:47:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:47:38,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:47:38,573 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 08:47:38,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:47:38,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88431677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:47:38,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:47:38,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-31 08:47:38,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083581814] [2022-01-31 08:47:38,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:47:38,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:47:38,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:47:38,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:47:38,578 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:47:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:38,594 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-01-31 08:47:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:47:38,595 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 08:47:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:38,595 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:47:38,595 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:47:38,596 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 08:47:38,596 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:38,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:47:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:47:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 08:47:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:47:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 08:47:38,600 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2022-01-31 08:47:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:38,600 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 08:47:38,600 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 08:47:38,600 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 08:47:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 08:47:38,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:38,603 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:47:38,622 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 08:47:38,815 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 08:47:38,816 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1061096375, now seen corresponding path program 1 times [2022-01-31 08:47:38,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:38,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528602402] [2022-01-31 08:47:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:38,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:47:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 08:47:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:47:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 08:47:38,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:38,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528602402] [2022-01-31 08:47:38,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528602402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:47:38,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033203708] [2022-01-31 08:47:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:38,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:47:38,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:38,896 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 08:47:38,897 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 08:47:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:38,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:47:38,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:47:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 08:47:39,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:47:39,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033203708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:47:39,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:47:39,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:47:39,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671869814] [2022-01-31 08:47:39,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:47:39,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:47:39,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:39,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:47:39,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:47:39,019 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:47:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:39,032 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-31 08:47:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:47:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-31 08:47:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:39,034 INFO L225 Difference]: With dead ends: 30 [2022-01-31 08:47:39,034 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 08:47:39,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:47:39,037 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:39,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:47:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 08:47:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 08:47:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:47:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 08:47:39,040 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2022-01-31 08:47:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:39,041 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 08:47:39,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:47:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 08:47:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 08:47:39,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:39,042 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:47:39,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 08:47:39,242 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 08:47:39,242 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:39,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:39,243 INFO L85 PathProgramCache]: Analyzing trace with hash -619501722, now seen corresponding path program 1 times [2022-01-31 08:47:39,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:39,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388778617] [2022-01-31 08:47:39,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:39,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:39,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:39,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:47:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:39,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 08:47:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:39,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:47:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:47:39,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:39,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388778617] [2022-01-31 08:47:39,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388778617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:47:39,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765102667] [2022-01-31 08:47:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:39,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:47:39,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:39,340 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 08:47:39,341 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 08:47:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:39,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:47:39,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:47:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:47:39,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:47:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:47:39,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765102667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:47:39,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:47:39,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:47:39,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415265797] [2022-01-31 08:47:39,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:47:39,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:47:39,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:39,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:47:39,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:47:39,547 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:47:39,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:39,650 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-01-31 08:47:39,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:47:39,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-01-31 08:47:39,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:39,651 INFO L225 Difference]: With dead ends: 35 [2022-01-31 08:47:39,651 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 08:47:39,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:47:39,651 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:39,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:47:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 08:47:39,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 08:47:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:47:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-31 08:47:39,655 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2022-01-31 08:47:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:39,655 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-31 08:47:39,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:47:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-31 08:47:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 08:47:39,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:39,656 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:47:39,674 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 08:47:39,875 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 08:47:39,876 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:39,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1074871916, now seen corresponding path program 2 times [2022-01-31 08:47:39,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:39,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055361316] [2022-01-31 08:47:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:39,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:39,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:39,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 08:47:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:39,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 08:47:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:39,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:47:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 08:47:39,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:39,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055361316] [2022-01-31 08:47:39,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055361316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:47:39,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726384026] [2022-01-31 08:47:39,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:47:39,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:47:39,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:39,946 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 08:47:39,947 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 08:47:40,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:47:40,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:47:40,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:47:40,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:47:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:47:40,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:47:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:47:40,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726384026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:47:40,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:47:40,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 08:47:40,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512364636] [2022-01-31 08:47:40,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:47:40,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:47:40,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:47:40,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:47:40,191 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 08:47:40,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:40,373 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-01-31 08:47:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 08:47:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2022-01-31 08:47:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:40,375 INFO L225 Difference]: With dead ends: 50 [2022-01-31 08:47:40,375 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 08:47:40,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-31 08:47:40,376 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:40,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 50 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:47:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 08:47:40,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 08:47:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:47:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-01-31 08:47:40,380 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 48 [2022-01-31 08:47:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:40,380 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-01-31 08:47:40,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 08:47:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-01-31 08:47:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 08:47:40,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:40,381 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:47:40,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:47:40,581 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 08:47:40,582 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash 859300597, now seen corresponding path program 3 times [2022-01-31 08:47:40,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:40,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674846585] [2022-01-31 08:47:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:40,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:40,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:40,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:47:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:40,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 08:47:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:40,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:47:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-31 08:47:40,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:40,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674846585] [2022-01-31 08:47:40,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674846585] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:47:40,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160240492] [2022-01-31 08:47:40,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:47:40,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:47:40,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:40,696 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 08:47:40,698 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 08:47:40,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:47:40,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:47:40,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:47:40,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:47:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-31 08:47:40,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:47:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-31 08:47:40,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160240492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:47:40,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:47:40,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:47:40,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593830846] [2022-01-31 08:47:40,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:47:40,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:47:40,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:40,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:47:40,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:47:40,893 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:47:40,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:40,956 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-01-31 08:47:40,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:47:40,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-01-31 08:47:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:40,958 INFO L225 Difference]: With dead ends: 55 [2022-01-31 08:47:40,958 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 08:47:40,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:47:40,959 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:40,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:47:40,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 08:47:40,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-31 08:47:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:47:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-31 08:47:40,973 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 66 [2022-01-31 08:47:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:40,973 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-31 08:47:40,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:47:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-31 08:47:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 08:47:40,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:40,976 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:47:40,995 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 08:47:41,191 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 08:47:41,192 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash 49480076, now seen corresponding path program 4 times [2022-01-31 08:47:41,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:41,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475717213] [2022-01-31 08:47:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:41,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:41,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:41,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:47:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:41,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 08:47:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:41,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 08:47:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-31 08:47:41,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:41,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475717213] [2022-01-31 08:47:41,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475717213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:47:41,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326506359] [2022-01-31 08:47:41,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:47:41,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:47:41,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:41,325 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 08:47:41,326 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 08:47:41,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:47:41,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:47:41,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:47:41,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:47:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-31 08:47:41,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:47:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-31 08:47:41,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326506359] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:47:41,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:47:41,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-31 08:47:41,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230622610] [2022-01-31 08:47:41,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:47:41,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 08:47:41,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:41,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 08:47:41,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-31 08:47:41,563 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:47:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:41,790 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-01-31 08:47:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 08:47:41,791 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-01-31 08:47:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:41,792 INFO L225 Difference]: With dead ends: 66 [2022-01-31 08:47:41,792 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 08:47:41,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 08:47:41,793 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:41,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 40 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:47:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 08:47:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-31 08:47:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:47:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-01-31 08:47:41,796 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 72 [2022-01-31 08:47:41,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:41,796 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-01-31 08:47:41,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:47:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-01-31 08:47:41,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 08:47:41,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:41,797 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:47:41,815 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 08:47:42,015 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 08:47:42,015 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:42,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2077107966, now seen corresponding path program 5 times [2022-01-31 08:47:42,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:42,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172419470] [2022-01-31 08:47:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:42,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:42,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:42,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:47:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:42,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 08:47:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:42,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 08:47:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-01-31 08:47:42,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:42,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172419470] [2022-01-31 08:47:42,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172419470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:47:42,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212403067] [2022-01-31 08:47:42,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:47:42,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:47:42,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:42,203 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 08:47:42,204 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 08:47:42,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-31 08:47:42,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:47:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:47:42,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:47:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-01-31 08:47:42,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:47:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-01-31 08:47:42,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212403067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:47:42,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:47:42,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-01-31 08:47:42,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627583364] [2022-01-31 08:47:42,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:47:42,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 08:47:42,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:42,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 08:47:42,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-31 08:47:42,879 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:47:43,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:43,252 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-01-31 08:47:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 08:47:43,253 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 98 [2022-01-31 08:47:43,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:43,253 INFO L225 Difference]: With dead ends: 84 [2022-01-31 08:47:43,253 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 08:47:43,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 08:47:43,255 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:43,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 45 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:47:43,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 08:47:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-31 08:47:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:47:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-01-31 08:47:43,259 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 98 [2022-01-31 08:47:43,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:43,259 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-01-31 08:47:43,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:47:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-01-31 08:47:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 08:47:43,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:43,260 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:47:43,293 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 08:47:43,471 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 08:47:43,472 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:43,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:43,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1610204012, now seen corresponding path program 6 times [2022-01-31 08:47:43,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:43,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28161101] [2022-01-31 08:47:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:43,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:43,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:43,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:47:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:43,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 08:47:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:43,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 08:47:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2022-01-31 08:47:43,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:43,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28161101] [2022-01-31 08:47:43,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28161101] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:47:43,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193885731] [2022-01-31 08:47:43,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:47:43,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:47:43,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:43,627 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 08:47:43,628 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 08:47:43,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-31 08:47:43,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:47:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:47:43,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:47:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 850 proven. 16 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2022-01-31 08:47:43,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:47:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2007 trivial. 0 not checked. [2022-01-31 08:47:44,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193885731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:47:44,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:47:44,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2022-01-31 08:47:44,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471986406] [2022-01-31 08:47:44,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:47:44,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:47:44,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:44,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:47:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:47:44,132 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:47:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:44,456 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-01-31 08:47:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 08:47:44,456 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 148 [2022-01-31 08:47:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:44,457 INFO L225 Difference]: With dead ends: 98 [2022-01-31 08:47:44,457 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 08:47:44,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 08:47:44,458 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:44,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 55 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:47:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 08:47:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-31 08:47:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:47:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-01-31 08:47:44,462 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 148 [2022-01-31 08:47:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:44,462 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-01-31 08:47:44,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:47:44,462 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-01-31 08:47:44,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 08:47:44,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:44,464 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:47:44,481 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 08:47:44,680 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 08:47:44,681 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:44,681 INFO L85 PathProgramCache]: Analyzing trace with hash -463648548, now seen corresponding path program 7 times [2022-01-31 08:47:44,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:44,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973274895] [2022-01-31 08:47:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:44,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:44,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:44,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:47:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:44,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 08:47:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:44,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-31 08:47:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:47:44,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:44,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973274895] [2022-01-31 08:47:44,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973274895] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:47:44,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720231530] [2022-01-31 08:47:44,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:47:44,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:47:44,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:44,851 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 08:47:44,871 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 08:47:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:44,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 08:47:44,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:47:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:47:45,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:47:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:47:45,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720231530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:47:45,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:47:45,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-01-31 08:47:45,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577381553] [2022-01-31 08:47:45,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:47:45,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 08:47:45,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:45,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 08:47:45,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:47:45,407 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 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 08:47:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:45,697 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2022-01-31 08:47:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 08:47:45,697 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 162 [2022-01-31 08:47:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:45,698 INFO L225 Difference]: With dead ends: 111 [2022-01-31 08:47:45,698 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 08:47:45,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 324 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=716, Invalid=1176, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 08:47:45,699 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:45,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 62 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:47:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 08:47:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-01-31 08:47:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 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 08:47:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-01-31 08:47:45,702 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 162 [2022-01-31 08:47:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:45,703 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-01-31 08:47:45,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 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 08:47:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-01-31 08:47:45,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 08:47:45,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:45,704 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 20, 20, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:47:45,737 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 08:47:45,911 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 08:47:45,911 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1979331862, now seen corresponding path program 8 times [2022-01-31 08:47:45,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:45,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811311769] [2022-01-31 08:47:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:45,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:45,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:45,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 08:47:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:46,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 08:47:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:46,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-01-31 08:47:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1319 trivial. 0 not checked. [2022-01-31 08:47:46,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:46,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811311769] [2022-01-31 08:47:46,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811311769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:47:46,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073582662] [2022-01-31 08:47:46,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:47:46,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:47:46,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:46,125 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:47:46,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 08:47:46,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:47:46,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:47:46,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 08:47:46,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:47:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 844 proven. 196 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2022-01-31 08:47:46,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:47:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1319 trivial. 0 not checked. [2022-01-31 08:47:46,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073582662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:47:46,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:47:46,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 23 [2022-01-31 08:47:46,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240483294] [2022-01-31 08:47:46,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:47:46,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 08:47:46,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:46,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 08:47:46,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 08:47:46,734 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 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 08:47:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:47,011 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2022-01-31 08:47:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 08:47:47,011 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 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 176 [2022-01-31 08:47:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:47,012 INFO L225 Difference]: With dead ends: 123 [2022-01-31 08:47:47,012 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 08:47:47,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 08:47:47,013 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:47,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 57 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:47:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 08:47:47,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-01-31 08:47:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 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 08:47:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2022-01-31 08:47:47,016 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 176 [2022-01-31 08:47:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:47,017 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2022-01-31 08:47:47,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 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 08:47:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2022-01-31 08:47:47,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 08:47:47,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:47,018 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 20, 20, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:47:47,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 08:47:47,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 08:47:47,236 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:47,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:47,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2117032296, now seen corresponding path program 9 times [2022-01-31 08:47:47,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:47,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191934511] [2022-01-31 08:47:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:47,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:47,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:47:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:47,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 08:47:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:47,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 08:47:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:47,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-01-31 08:47:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:47:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2022-01-31 08:47:47,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:47:47,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191934511] [2022-01-31 08:47:47,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191934511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:47:47,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802602557] [2022-01-31 08:47:47,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:47:47,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:47:47,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:47:47,410 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:47:47,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 08:47:48,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-31 08:47:48,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:47:48,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:47:48,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:47:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 1690 proven. 100 refuted. 0 times theorem prover too weak. 2445 trivial. 0 not checked. [2022-01-31 08:47:48,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:47:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2022-01-31 08:47:48,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802602557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:47:48,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:47:48,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 23 [2022-01-31 08:47:48,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415975055] [2022-01-31 08:47:48,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:47:48,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 08:47:48,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:48,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 08:47:48,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 08:47:48,760 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 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 08:47:49,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:47:49,035 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2022-01-31 08:47:49,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 08:47:49,035 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 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 212 [2022-01-31 08:47:49,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:47:49,036 INFO L225 Difference]: With dead ends: 141 [2022-01-31 08:47:49,036 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 08:47:49,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 422 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=652, Invalid=1070, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 08:47:49,037 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:47:49,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 62 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:47:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 08:47:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-01-31 08:47:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 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 08:47:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-01-31 08:47:49,040 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 212 [2022-01-31 08:47:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:47:49,040 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-01-31 08:47:49,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 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 08:47:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-01-31 08:47:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 08:47:49,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:47:49,042 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 20, 20, 19, 19, 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 08:47:49,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-31 08:47:49,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 08:47:49,255 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:47:49,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:47:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2090469341, now seen corresponding path program 10 times [2022-01-31 08:47:49,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:47:49,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323774712] [2022-01-31 08:47:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:47:49,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:47:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat