/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-lopstr16/motivex.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:49:44,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:49:44,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:49:44,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 10:49:44,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:49:44,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:49:44,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:49:44,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:49:44,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:49:44,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:49:44,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:49:44,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:49:44,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:49:44,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:49:44,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:49:44,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:49:44,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:49:44,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:49:44,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:49:44,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:49:44,951 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:49:44,974 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:49:44,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:49:44,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:49:44,977 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:49:44,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:49:44,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:49:44,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:49:44,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:49:44,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:49:44,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:49:44,978 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:49:44,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:49:44,979 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:49:44,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:49:44,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:49:44,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:49:44,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:49:44,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:49:44,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:49:44,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:49:44,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:49:44,986 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:49:44,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:49:45,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:49:45,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:49:45,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:49:45,239 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:49:45,240 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:49:45,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/motivex.i [2022-01-31 10:49:45,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c702cfc4/1e6e9eab339241ceb21336afc56799d9/FLAGd33f1e53e [2022-01-31 10:49:45,666 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:49:45,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/motivex.i [2022-01-31 10:49:45,672 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c702cfc4/1e6e9eab339241ceb21336afc56799d9/FLAGd33f1e53e [2022-01-31 10:49:46,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c702cfc4/1e6e9eab339241ceb21336afc56799d9 [2022-01-31 10:49:46,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:49:46,089 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:49:46,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:49:46,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:49:46,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:49:46,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:49:46" (1/1) ... [2022-01-31 10:49:46,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0c2f69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:46, skipping insertion in model container [2022-01-31 10:49:46,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:49:46" (1/1) ... [2022-01-31 10:49:46,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:49:46,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:49:46,281 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-lopstr16/motivex.i[800,813] [2022-01-31 10:49:46,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:49:46,522 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:49:46,533 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-lopstr16/motivex.i[800,813] [2022-01-31 10:49:46,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:49:46,555 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:49:46,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:46 WrapperNode [2022-01-31 10:49:46,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:49:46,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:49:46,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:49:46,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:49:46,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:46" (1/1) ... [2022-01-31 10:49:46,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:46" (1/1) ... [2022-01-31 10:49:46,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:46" (1/1) ... [2022-01-31 10:49:46,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:46" (1/1) ... [2022-01-31 10:49:46,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:46" (1/1) ... [2022-01-31 10:49:46,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:46" (1/1) ... [2022-01-31 10:49:46,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:46" (1/1) ... [2022-01-31 10:49:46,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:49:46,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:49:46,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:49:46,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:49:46,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:46" (1/1) ... [2022-01-31 10:49:46,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:49:46,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:46,632 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 10:49:46,659 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 10:49:46,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:49:46,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:49:46,676 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:49:46,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:49:46,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:49:46,677 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:49:46,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:49:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 10:49:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 10:49:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:49:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:49:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:49:46,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 10:49:46,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:49:46,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:49:46,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:49:46,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:49:46,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:49:46,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:49:46,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:49:46,764 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:49:46,765 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:49:46,861 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:49:46,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:49:46,866 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 10:49:46,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:49:46 BoogieIcfgContainer [2022-01-31 10:49:46,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:49:46,868 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:49:46,868 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:49:46,869 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:49:46,871 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:49:46" (1/1) ... [2022-01-31 10:49:46,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:49:46 BasicIcfg [2022-01-31 10:49:46,886 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:49:46,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:49:46,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:49:46,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:49:46,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:49:46" (1/4) ... [2022-01-31 10:49:46,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52415164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:49:46, skipping insertion in model container [2022-01-31 10:49:46,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:46" (2/4) ... [2022-01-31 10:49:46,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52415164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:49:46, skipping insertion in model container [2022-01-31 10:49:46,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:49:46" (3/4) ... [2022-01-31 10:49:46,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52415164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:49:46, skipping insertion in model container [2022-01-31 10:49:46,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:49:46" (4/4) ... [2022-01-31 10:49:46,893 INFO L111 eAbstractionObserver]: Analyzing ICFG motivex.iJordan [2022-01-31 10:49:46,897 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:49:46,898 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:49:46,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:49:46,935 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 10:49:46,935 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:49:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:49:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 10:49:46,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:46,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:46,951 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:46,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:46,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1753440720, now seen corresponding path program 1 times [2022-01-31 10:49:46,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:46,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452382165] [2022-01-31 10:49:46,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:46,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:47,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:49:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:47,117 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 10:49:47,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:47,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452382165] [2022-01-31 10:49:47,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452382165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:49:47,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:49:47,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:49:47,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017708576] [2022-01-31 10:49:47,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:49:47,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:49:47,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:47,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:49:47,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:49:47,146 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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 10:49:47,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:47,225 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-01-31 10:49:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:49:47,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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 16 [2022-01-31 10:49:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:47,232 INFO L225 Difference]: With dead ends: 43 [2022-01-31 10:49:47,232 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 10:49:47,234 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 10:49:47,257 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:47,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:49:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 10:49:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2022-01-31 10:49:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:49:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-31 10:49:47,291 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2022-01-31 10:49:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:47,291 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-31 10:49:47,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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 10:49:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-31 10:49:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 10:49:47,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:47,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:47,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:49:47,293 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:47,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:47,295 INFO L85 PathProgramCache]: Analyzing trace with hash -207143890, now seen corresponding path program 1 times [2022-01-31 10:49:47,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:47,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71313096] [2022-01-31 10:49:47,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:47,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:47,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:49:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:47,396 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 10:49:47,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:47,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71313096] [2022-01-31 10:49:47,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71313096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:49:47,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:49:47,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:49:47,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078896769] [2022-01-31 10:49:47,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:49:47,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 10:49:47,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:47,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 10:49:47,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 10:49:47,400 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 10:49:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:47,495 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-01-31 10:49:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 10:49:47,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 16 [2022-01-31 10:49:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:47,497 INFO L225 Difference]: With dead ends: 34 [2022-01-31 10:49:47,497 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 10:49:47,497 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 10:49:47,499 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:47,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:49:47,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 10:49:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-01-31 10:49:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:49:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-31 10:49:47,504 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2022-01-31 10:49:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:47,504 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-31 10:49:47,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 10:49:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-31 10:49:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 10:49:47,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:47,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:47,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 10:49:47,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:47,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:47,506 INFO L85 PathProgramCache]: Analyzing trace with hash 200764042, now seen corresponding path program 1 times [2022-01-31 10:49:47,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:47,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677967171] [2022-01-31 10:49:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:47,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:47,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:49:47,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241046539] [2022-01-31 10:49:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:47,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:47,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:47,556 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 10:49:47,560 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 10:49:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:47,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 10:49:47,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:49:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:49:47,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:49:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:49:47,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677967171] [2022-01-31 10:49:47,772 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:49:47,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241046539] [2022-01-31 10:49:47,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241046539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:49:47,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:49:47,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-31 10:49:47,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472234793] [2022-01-31 10:49:47,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:49:47,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 10:49:47,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 10:49:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-31 10:49:47,779 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 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 10:49:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:47,875 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-01-31 10:49:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 10:49:47,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 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 21 [2022-01-31 10:49:47,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:47,880 INFO L225 Difference]: With dead ends: 57 [2022-01-31 10:49:47,880 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 10:49:47,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-31 10:49:47,884 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 53 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:47,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 54 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:49:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 10:49:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2022-01-31 10:49:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:49:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-01-31 10:49:47,899 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2022-01-31 10:49:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:47,899 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-01-31 10:49:47,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 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 10:49:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-01-31 10:49:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 10:49:47,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:47,901 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:47,922 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 10:49:48,111 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 10:49:48,111 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:48,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:48,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1216808374, now seen corresponding path program 2 times [2022-01-31 10:49:48,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:48,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236619010] [2022-01-31 10:49:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:48,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:48,150 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:49:48,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529769457] [2022-01-31 10:49:48,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:49:48,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:48,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:48,160 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 10:49:48,161 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 10:49:48,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-31 10:49:48,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:49:48,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:49:48,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:49:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-31 10:49:48,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:49:48,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:48,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236619010] [2022-01-31 10:49:48,315 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:49:48,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529769457] [2022-01-31 10:49:48,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529769457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:49:48,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:49:48,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 10:49:48,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653036280] [2022-01-31 10:49:48,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:49:48,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:49:48,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:48,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:49:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:49:48,320 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 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 10:49:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:48,343 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-01-31 10:49:48,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 10:49:48,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 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 36 [2022-01-31 10:49:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:48,346 INFO L225 Difference]: With dead ends: 47 [2022-01-31 10:49:48,346 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 10:49:48,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 10:49:48,350 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:48,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 99 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:49:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 10:49:48,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-01-31 10:49:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:49:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-01-31 10:49:48,360 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 36 [2022-01-31 10:49:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:48,360 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-01-31 10:49:48,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 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 10:49:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-01-31 10:49:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 10:49:48,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:48,363 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:48,388 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 10:49:48,579 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,SelfDestructingSolverStorable3 [2022-01-31 10:49:48,579 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1217731895, now seen corresponding path program 1 times [2022-01-31 10:49:48,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:48,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865328827] [2022-01-31 10:49:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:48,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:48,600 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:49:48,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581317340] [2022-01-31 10:49:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:48,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:48,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:48,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:49:48,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 10:49:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:48,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:49:48,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:49:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 10:49:48,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:49:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 10:49:48,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:48,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865328827] [2022-01-31 10:49:48,915 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:49:48,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581317340] [2022-01-31 10:49:48,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581317340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:49:48,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:49:48,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-31 10:49:48,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274942133] [2022-01-31 10:49:48,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:49:48,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:49:48,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:48,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:49:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:49:48,918 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 2 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 10:49:49,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:49,103 INFO L93 Difference]: Finished difference Result 131 states and 171 transitions. [2022-01-31 10:49:49,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 10:49:49,104 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 2 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 36 [2022-01-31 10:49:49,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:49,108 INFO L225 Difference]: With dead ends: 131 [2022-01-31 10:49:49,108 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 10:49:49,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:49:49,109 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 143 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:49,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 89 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:49:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 10:49:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 76. [2022-01-31 10:49:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 69 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:49:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2022-01-31 10:49:49,131 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 36 [2022-01-31 10:49:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:49,132 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2022-01-31 10:49:49,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 2 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 10:49:49,132 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2022-01-31 10:49:49,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 10:49:49,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:49,134 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:49,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 10:49:49,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:49,348 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:49,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:49,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1391925373, now seen corresponding path program 2 times [2022-01-31 10:49:49,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:49,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911393522] [2022-01-31 10:49:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:49,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:49,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:49:49,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868425372] [2022-01-31 10:49:49,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:49:49,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:49,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:49,386 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:49:49,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 10:49:49,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:49:49,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:49:49,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 10:49:49,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:49:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-31 10:49:49,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:49:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-31 10:49:49,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911393522] [2022-01-31 10:49:49,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:49:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868425372] [2022-01-31 10:49:49,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868425372] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:49:49,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:49:49,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-31 10:49:49,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228222011] [2022-01-31 10:49:49,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:49:49,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 10:49:49,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:49,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 10:49:49,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:49:49,960 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 2 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 10:49:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:50,347 INFO L93 Difference]: Finished difference Result 263 states and 351 transitions. [2022-01-31 10:49:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 10:49:50,349 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 2 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 66 [2022-01-31 10:49:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:50,351 INFO L225 Difference]: With dead ends: 263 [2022-01-31 10:49:50,351 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 10:49:50,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:49:50,352 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 435 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:50,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 148 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:49:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 10:49:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 136. [2022-01-31 10:49:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.203125) internal successors, (154), 129 states have internal predecessors, (154), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:49:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 161 transitions. [2022-01-31 10:49:50,367 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 161 transitions. Word has length 66 [2022-01-31 10:49:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:50,367 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 161 transitions. [2022-01-31 10:49:50,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 2 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 10:49:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 161 transitions. [2022-01-31 10:49:50,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 10:49:50,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:50,369 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:50,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 10:49:50,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:50,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1290064923, now seen corresponding path program 3 times [2022-01-31 10:49:50,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:50,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781328115] [2022-01-31 10:49:50,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:50,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:50,670 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:49:50,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827657008] [2022-01-31 10:49:50,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:49:50,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:50,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:50,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:49:50,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process