/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:23:39,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:23:39,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:23:39,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:23:39,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:23:39,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:23:39,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:23:39,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:23:39,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:23:39,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:23:39,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:23:39,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:23:39,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:23:39,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:23:39,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:23:39,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:23:39,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:23:39,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:23:39,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:23:39,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:23:39,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:23:39,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:23:39,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:23:39,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:23:39,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:23:39,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:23:39,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:23:39,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:23:39,757 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:23:39,769 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:23:39,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:23:39,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:23:39,771 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:23:39,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:23:39,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:23:39,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:23:39,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:23:39,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:23:39,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:23:39,773 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:23:39,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:23:39,773 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:23:39,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:23:39,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:23:39,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:23:39,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:23:39,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:23:39,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:39,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:23:39,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:23:39,775 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:23:39,775 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:23:40,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:23:40,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:23:40,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:23:40,061 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:23:40,061 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:23:40,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2022-01-31 07:23:40,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87aa14c3d/86671c96949a4feabfe298917527c54e/FLAGe1c38d5b5 [2022-01-31 07:23:40,586 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:23:40,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2022-01-31 07:23:40,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87aa14c3d/86671c96949a4feabfe298917527c54e/FLAGe1c38d5b5 [2022-01-31 07:23:40,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87aa14c3d/86671c96949a4feabfe298917527c54e [2022-01-31 07:23:40,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:23:40,614 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:23:40,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:40,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:23:40,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:23:40,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55bdef10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:23:40,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:23:40,795 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i[838,851] [2022-01-31 07:23:40,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:40,840 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:23:40,856 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i[838,851] [2022-01-31 07:23:40,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:40,895 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:23:40,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40 WrapperNode [2022-01-31 07:23:40,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:40,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:23:40,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:23:40,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:23:40,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:23:40,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:23:40,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:23:40,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:23:40,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:40,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:40,997 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 07:23:41,019 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 07:23:41,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:23:41,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:23:41,034 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:23:41,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:23:41,034 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2022-01-31 07:23:41,035 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2022-01-31 07:23:41,035 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:23:41,035 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:23:41,035 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:23:41,036 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:23:41,036 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:23:41,036 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:23:41,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:23:41,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:23:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:23:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2022-01-31 07:23:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:23:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2022-01-31 07:23:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:23:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:23:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:23:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:23:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:23:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:23:41,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:23:41,143 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:23:41,145 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:23:41,346 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:23:41,352 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:23:41,352 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-01-31 07:23:41,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:41 BoogieIcfgContainer [2022-01-31 07:23:41,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:23:41,355 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:23:41,355 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:23:41,360 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:23:41,362 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:41" (1/1) ... [2022-01-31 07:23:41,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:41 BasicIcfg [2022-01-31 07:23:41,399 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:23:41,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:23:41,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:23:41,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:23:41,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:23:40" (1/4) ... [2022-01-31 07:23:41,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3147fea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:41, skipping insertion in model container [2022-01-31 07:23:41,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (2/4) ... [2022-01-31 07:23:41,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3147fea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:41, skipping insertion in model container [2022-01-31 07:23:41,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:41" (3/4) ... [2022-01-31 07:23:41,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3147fea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:23:41, skipping insertion in model container [2022-01-31 07:23:41,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:41" (4/4) ... [2022-01-31 07:23:41,407 INFO L111 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.iJordan [2022-01-31 07:23:41,412 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:23:41,412 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:23:41,461 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:23:41,469 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 07:23:41,469 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:23:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 48 states have internal predecessors, (71), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 07:23:41,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 07:23:41,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:41,501 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1089636002, now seen corresponding path program 1 times [2022-01-31 07:23:41,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:41,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822755157] [2022-01-31 07:23:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:41,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:41,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822755157] [2022-01-31 07:23:41,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822755157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:41,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:41,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:23:41,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777968394] [2022-01-31 07:23:41,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:41,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:41,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:41,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:41,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:23:41,742 INFO L87 Difference]: Start difference. First operand has 61 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 48 states have internal predecessors, (71), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:41,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:41,818 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-01-31 07:23:41,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:41,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 07:23:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:41,830 INFO L225 Difference]: With dead ends: 61 [2022-01-31 07:23:41,830 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 07:23:41,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:23:41,837 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 57 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:41,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 72 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 07:23:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 07:23:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 07:23:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-01-31 07:23:41,881 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 14 [2022-01-31 07:23:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:41,882 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-01-31 07:23:41,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-01-31 07:23:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 07:23:41,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:41,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:23:41,886 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:41,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:41,888 INFO L85 PathProgramCache]: Analyzing trace with hash 653174333, now seen corresponding path program 1 times [2022-01-31 07:23:41,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:41,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080314103] [2022-01-31 07:23:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:41,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:41,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080314103] [2022-01-31 07:23:41,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080314103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:41,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:41,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:23:41,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867231191] [2022-01-31 07:23:41,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:41,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:23:41,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:41,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:23:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:23:41,942 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:42,096 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2022-01-31 07:23:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:23:42,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 07:23:42,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:42,097 INFO L225 Difference]: With dead ends: 89 [2022-01-31 07:23:42,098 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 07:23:42,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:42,099 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 114 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:42,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 60 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 07:23:42,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2022-01-31 07:23:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 07:23:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2022-01-31 07:23:42,109 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2022-01-31 07:23:42,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:42,109 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2022-01-31 07:23:42,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:42,109 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2022-01-31 07:23:42,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 07:23:42,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:42,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:42,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:23:42,110 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:42,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2011924993, now seen corresponding path program 1 times [2022-01-31 07:23:42,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:42,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161274541] [2022-01-31 07:23:42,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:42,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:42,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161274541] [2022-01-31 07:23:42,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161274541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:42,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546917875] [2022-01-31 07:23:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:42,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:42,167 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 07:23:42,170 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 07:23:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:23:42,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:42,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:42,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546917875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:42,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:42,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:23:42,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141910599] [2022-01-31 07:23:42,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:42,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:23:42,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:42,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:23:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:23:42,424 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:42,887 INFO L93 Difference]: Finished difference Result 187 states and 252 transitions. [2022-01-31 07:23:42,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:23:42,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 07:23:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:42,890 INFO L225 Difference]: With dead ends: 187 [2022-01-31 07:23:42,891 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 07:23:42,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 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 07:23:42,893 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 332 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:42,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 74 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 07:23:42,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 07:23:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 63. [2022-01-31 07:23:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 07:23:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-01-31 07:23:42,905 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 16 [2022-01-31 07:23:42,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:42,906 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-01-31 07:23:42,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-01-31 07:23:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 07:23:42,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:42,907 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:42,933 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 07:23:43,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:43,123 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1595994693, now seen corresponding path program 2 times [2022-01-31 07:23:43,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:43,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837814158] [2022-01-31 07:23:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:23:43,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:43,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837814158] [2022-01-31 07:23:43,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837814158] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:43,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:43,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:23:43,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877788059] [2022-01-31 07:23:43,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:43,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:43,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:43,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:43,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:43,209 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:43,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:43,326 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-01-31 07:23:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:23:43,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 07:23:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:43,329 INFO L225 Difference]: With dead ends: 69 [2022-01-31 07:23:43,330 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 07:23:43,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:43,335 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 89 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:43,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 60 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 07:23:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-01-31 07:23:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 07:23:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-01-31 07:23:43,350 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2022-01-31 07:23:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:43,350 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-01-31 07:23:43,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:43,351 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-01-31 07:23:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 07:23:43,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:43,352 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:43,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 07:23:43,353 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:43,353 INFO L85 PathProgramCache]: Analyzing trace with hash -192296311, now seen corresponding path program 1 times [2022-01-31 07:23:43,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:43,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439828351] [2022-01-31 07:23:43,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:23:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 07:23:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:23:43,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:43,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439828351] [2022-01-31 07:23:43,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439828351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:43,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:43,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:23:43,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586455320] [2022-01-31 07:23:43,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:43,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:43,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:43,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:43,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:43,449 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:43,575 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2022-01-31 07:23:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 07:23:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-01-31 07:23:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:43,576 INFO L225 Difference]: With dead ends: 84 [2022-01-31 07:23:43,577 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 07:23:43,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:43,578 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 90 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:43,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 50 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:43,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 07:23:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2022-01-31 07:23:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 07:23:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-01-31 07:23:43,584 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 41 [2022-01-31 07:23:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:43,584 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-01-31 07:23:43,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-01-31 07:23:43,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 07:23:43,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:43,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:43,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 07:23:43,587 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:43,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:43,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1897450043, now seen corresponding path program 1 times [2022-01-31 07:23:43,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:43,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379390320] [2022-01-31 07:23:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 07:23:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 07:23:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:23:43,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:43,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379390320] [2022-01-31 07:23:43,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379390320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:43,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166697003] [2022-01-31 07:23:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:43,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:43,684 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 07:23:43,712 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 07:23:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:23:43,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:43,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:44,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166697003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:44,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:44,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-01-31 07:23:44,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025437761] [2022-01-31 07:23:44,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:44,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 07:23:44,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:44,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 07:23:44,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-01-31 07:23:44,066 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 07:23:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:45,475 INFO L93 Difference]: Finished difference Result 539 states and 745 transitions. [2022-01-31 07:23:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 07:23:45,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-01-31 07:23:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:45,479 INFO L225 Difference]: With dead ends: 539 [2022-01-31 07:23:45,479 INFO L226 Difference]: Without dead ends: 539 [2022-01-31 07:23:45,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=729, Invalid=1721, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 07:23:45,481 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1064 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:45,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1068 Valid, 53 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 07:23:45,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-31 07:23:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 95. [2022-01-31 07:23:45,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 80 states have (on average 1.175) internal successors, (94), 80 states have internal predecessors, (94), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 07:23:45,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2022-01-31 07:23:45,506 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 43 [2022-01-31 07:23:45,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:45,507 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2022-01-31 07:23:45,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 07:23:45,507 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2022-01-31 07:23:45,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 07:23:45,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:45,508 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:45,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 07:23:45,723 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,SelfDestructingSolverStorable5 [2022-01-31 07:23:45,724 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:45,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1148068213, now seen corresponding path program 2 times [2022-01-31 07:23:45,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:45,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917439106] [2022-01-31 07:23:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:45,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 07:23:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 07:23:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-31 07:23:45,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:45,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917439106] [2022-01-31 07:23:45,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917439106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:45,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:45,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 07:23:45,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121681915] [2022-01-31 07:23:45,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:45,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 07:23:45,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:45,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 07:23:45,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:23:45,834 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:45,963 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2022-01-31 07:23:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:23:45,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-01-31 07:23:45,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:45,969 INFO L225 Difference]: With dead ends: 103 [2022-01-31 07:23:45,969 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 07:23:45,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 07:23:45,970 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 65 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:45,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 55 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 07:23:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-01-31 07:23:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 84 states have internal predecessors, (99), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-31 07:23:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-01-31 07:23:45,983 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 57 [2022-01-31 07:23:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:45,983 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-01-31 07:23:45,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-01-31 07:23:45,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 07:23:45,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:45,989 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:45,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 07:23:45,989 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:45,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:45,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1504305557, now seen corresponding path program 1 times [2022-01-31 07:23:45,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:45,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469694659] [2022-01-31 07:23:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:45,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 07:23:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 07:23:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-31 07:23:46,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:46,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469694659] [2022-01-31 07:23:46,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469694659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:46,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:46,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 07:23:46,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766879282] [2022-01-31 07:23:46,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:46,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 07:23:46,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:46,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 07:23:46,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:46,088 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:46,181 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-01-31 07:23:46,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 07:23:46,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-01-31 07:23:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:46,181 INFO L225 Difference]: With dead ends: 58 [2022-01-31 07:23:46,182 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 07:23:46,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:23:46,182 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:46,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 32 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 07:23:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 07:23:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 07:23:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 07:23:46,184 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2022-01-31 07:23:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:46,184 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 07:23:46,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 07:23:46,184 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 07:23:46,187 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 07:23:46,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 07:23:46,190 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-01-31 07:23:46,191 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 07:23:46,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:23:46 BasicIcfg [2022-01-31 07:23:46,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 07:23:46,194 INFO L158 Benchmark]: Toolchain (without parser) took 5580.28ms. Allocated memory was 190.8MB in the beginning and 244.3MB in the end (delta: 53.5MB). Free memory was 141.8MB in the beginning and 150.6MB in the end (delta: -8.8MB). Peak memory consumption was 45.3MB. Max. memory is 8.0GB. [2022-01-31 07:23:46,194 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 190.8MB. Free memory was 158.3MB in the beginning and 158.1MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 07:23:46,194 INFO L158 Benchmark]: CACSL2BoogieTranslator took 280.59ms. Allocated memory is still 190.8MB. Free memory was 141.5MB in the beginning and 166.7MB in the end (delta: -25.2MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. [2022-01-31 07:23:46,194 INFO L158 Benchmark]: Boogie Preprocessor took 56.04ms. Allocated memory is still 190.8MB. Free memory was 166.7MB in the beginning and 165.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 07:23:46,195 INFO L158 Benchmark]: RCFGBuilder took 400.20ms. Allocated memory is still 190.8MB. Free memory was 165.1MB in the beginning and 150.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-01-31 07:23:46,195 INFO L158 Benchmark]: IcfgTransformer took 44.50ms. Allocated memory is still 190.8MB. Free memory was 150.4MB in the beginning and 148.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 07:23:46,195 INFO L158 Benchmark]: TraceAbstraction took 4792.96ms. Allocated memory was 190.8MB in the beginning and 244.3MB in the end (delta: 53.5MB). Free memory was 148.3MB in the beginning and 150.6MB in the end (delta: -2.2MB). Peak memory consumption was 52.3MB. Max. memory is 8.0GB. [2022-01-31 07:23:46,196 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 190.8MB. Free memory was 158.3MB in the beginning and 158.1MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 280.59ms. Allocated memory is still 190.8MB. Free memory was 141.5MB in the beginning and 166.7MB in the end (delta: -25.2MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 56.04ms. Allocated memory is still 190.8MB. Free memory was 166.7MB in the beginning and 165.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 400.20ms. Allocated memory is still 190.8MB. Free memory was 165.1MB in the beginning and 150.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * IcfgTransformer took 44.50ms. Allocated memory is still 190.8MB. Free memory was 150.4MB in the beginning and 148.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 4792.96ms. Allocated memory was 190.8MB in the beginning and 244.3MB in the end (delta: 53.5MB). Free memory was 148.3MB in the beginning and 150.6MB in the end (delta: -2.2MB). Peak memory consumption was 52.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.7s, OverallIterations: 8, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1890 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1858 mSDsluCounter, 456 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 58 mSDsCounter, 934 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1828 IncrementalHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 934 mSolverCounterUnsat, 398 mSDtfsCounter, 1828 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 242 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=7, InterpolantAutomatonStates: 78, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 622 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 323 NumberOfCodeBlocks, 323 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 370 ConstructedInterpolants, 0 QuantifiedInterpolants, 608 SizeOfPredicates, 0 NumberOfNonLiveVariables, 289 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 258/294 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-31 07:23:46,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...