/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 21:19:37,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 21:19:37,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 21:19:37,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 21:19:37,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 21:19:37,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 21:19:37,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 21:19:37,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 21:19:37,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 21:19:37,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 21:19:37,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 21:19:37,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 21:19:37,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 21:19:37,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 21:19:37,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 21:19:37,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 21:19:37,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 21:19:37,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 21:19:37,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 21:19:37,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 21:19:37,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 21:19:37,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 21:19:37,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 21:19:37,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 21:19:37,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 21:19:37,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 21:19:37,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 21:19:37,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 21:19:37,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 21:19:37,965 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 21:19:37,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 21:19:37,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 21:19:37,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 21:19:37,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 21:19:37,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 21:19:37,966 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 21:19:37,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 21:19:37,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 21:19:37,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 21:19:37,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 21:19:37,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 21:19:37,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 21:19:37,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 21:19:37,972 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 21:19:37,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 21:19:37,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 21:19:37,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 21:19:37,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 21:19:37,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 21:19:37,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 21:19:37,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 21:19:37,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 21:19:37,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 21:19:37,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 21:19:37,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 21:19:37,974 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 21:19:37,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 21:19:37,975 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 21:19:37,976 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 21:19:38,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 21:19:38,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 21:19:38,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 21:19:38,215 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 21:19:38,218 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 21:19:38,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-02-23 21:19:38,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1995371cd/50b219c91627435a8099c77ced256caf/FLAGb11bed9d6 [2022-02-23 21:19:38,636 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 21:19:38,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-02-23 21:19:38,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1995371cd/50b219c91627435a8099c77ced256caf/FLAGb11bed9d6 [2022-02-23 21:19:38,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1995371cd/50b219c91627435a8099c77ced256caf [2022-02-23 21:19:38,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 21:19:38,665 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 21:19:38,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 21:19:38,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 21:19:38,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 21:19:38,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 09:19:38" (1/1) ... [2022-02-23 21:19:38,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f069f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:19:38, skipping insertion in model container [2022-02-23 21:19:38,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 09:19:38" (1/1) ... [2022-02-23 21:19:38,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 21:19:38,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 21:19:38,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2022-02-23 21:19:38,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 21:19:38,896 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 21:19:38,904 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2022-02-23 21:19:38,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 21:19:38,915 INFO L208 MainTranslator]: Completed translation [2022-02-23 21:19:38,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:19:38 WrapperNode [2022-02-23 21:19:38,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 21:19:38,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 21:19:38,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 21:19:38,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 21:19:38,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:19:38" (1/1) ... [2022-02-23 21:19:38,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:19:38" (1/1) ... [2022-02-23 21:19:38,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:19:38" (1/1) ... [2022-02-23 21:19:38,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:19:38" (1/1) ... [2022-02-23 21:19:38,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:19:38" (1/1) ... [2022-02-23 21:19:38,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:19:38" (1/1) ... [2022-02-23 21:19:38,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:19:38" (1/1) ... [2022-02-23 21:19:38,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 21:19:38,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 21:19:38,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 21:19:38,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 21:19:38,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:19:38" (1/1) ... [2022-02-23 21:19:38,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 21:19:38,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:19:38,963 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) [2022-02-23 21:19:38,979 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 [2022-02-23 21:19:38,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 21:19:38,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 21:19:38,995 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 21:19:38,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 21:19:38,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 21:19:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 21:19:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 21:19:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 21:19:38,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 21:19:38,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 21:19:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 21:19:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 21:19:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 21:19:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 21:19:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 21:19:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 21:19:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 21:19:39,045 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 21:19:39,046 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 21:19:39,120 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 21:19:39,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 21:19:39,125 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 21:19:39,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 09:19:39 BoogieIcfgContainer [2022-02-23 21:19:39,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 21:19:39,127 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 21:19:39,127 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 21:19:39,135 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 21:19:39,138 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 09:19:39" (1/1) ... [2022-02-23 21:19:39,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 09:19:39 BasicIcfg [2022-02-23 21:19:39,154 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 21:19:39,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 21:19:39,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 21:19:39,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 21:19:39,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 09:19:38" (1/4) ... [2022-02-23 21:19:39,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4876d41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 09:19:39, skipping insertion in model container [2022-02-23 21:19:39,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:19:38" (2/4) ... [2022-02-23 21:19:39,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4876d41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 09:19:39, skipping insertion in model container [2022-02-23 21:19:39,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 09:19:39" (3/4) ... [2022-02-23 21:19:39,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4876d41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 09:19:39, skipping insertion in model container [2022-02-23 21:19:39,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 09:19:39" (4/4) ... [2022-02-23 21:19:39,161 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.cqvasr [2022-02-23 21:19:39,164 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 21:19:39,165 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 21:19:39,198 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 21:19:39,203 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-02-23 21:19:39,203 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 21:19:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-02-23 21:19:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 21:19:39,219 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:39,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:39,220 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:39,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1381876426, now seen corresponding path program 1 times [2022-02-23 21:19:39,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:39,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660306439] [2022-02-23 21:19:39,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:39,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:39,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:19:39,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:39,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660306439] [2022-02-23 21:19:39,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660306439] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:19:39,352 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:19:39,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 21:19:39,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587880945] [2022-02-23 21:19:39,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:19:39,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 21:19:39,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:39,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 21:19:39,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 21:19:39,380 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-02-23 21:19:39,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:19:39,408 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-02-23 21:19:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 21:19:39,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-02-23 21:19:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:19:39,414 INFO L225 Difference]: With dead ends: 34 [2022-02-23 21:19:39,414 INFO L226 Difference]: Without dead ends: 15 [2022-02-23 21:19:39,416 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 [2022-02-23 21:19:39,419 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:19:39,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:19:39,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-23 21:19:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-23 21:19:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 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) [2022-02-23 21:19:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-02-23 21:19:39,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-02-23 21:19:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:19:39,445 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-02-23 21:19:39,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-02-23 21:19:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-02-23 21:19:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 21:19:39,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:39,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:39,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 21:19:39,446 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:39,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1382799947, now seen corresponding path program 1 times [2022-02-23 21:19:39,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:39,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365227562] [2022-02-23 21:19:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:39,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:39,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:19:39,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:39,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365227562] [2022-02-23 21:19:39,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365227562] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:19:39,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:19:39,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 21:19:39,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370725201] [2022-02-23 21:19:39,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:19:39,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 21:19:39,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 21:19:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 21:19:39,532 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-02-23 21:19:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:19:39,569 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-02-23 21:19:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 21:19:39,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-02-23 21:19:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:19:39,570 INFO L225 Difference]: With dead ends: 26 [2022-02-23 21:19:39,570 INFO L226 Difference]: Without dead ends: 17 [2022-02-23 21:19:39,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 21:19:39,572 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:19:39,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:19:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-23 21:19:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-23 21:19:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 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) [2022-02-23 21:19:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-23 21:19:39,583 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-02-23 21:19:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:19:39,584 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-23 21:19:39,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-02-23 21:19:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-23 21:19:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-23 21:19:39,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:39,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:39,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 21:19:39,585 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:39,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:39,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1658763799, now seen corresponding path program 1 times [2022-02-23 21:19:39,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:39,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489828533] [2022-02-23 21:19:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:39,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:39,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:19:39,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:39,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489828533] [2022-02-23 21:19:39,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489828533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:19:39,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447336387] [2022-02-23 21:19:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:39,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:39,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:19:39,678 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) [2022-02-23 21:19:39,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 21:19:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:39,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 21:19:39,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:19:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:19:39,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:19:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:19:39,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447336387] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:19:39,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:19:39,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-23 21:19:39,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456363504] [2022-02-23 21:19:39,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:19:39,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 21:19:39,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:39,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 21:19:39,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 21:19:39,852 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-02-23 21:19:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:19:39,945 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-02-23 21:19:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 21:19:39,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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 13 [2022-02-23 21:19:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:19:39,947 INFO L225 Difference]: With dead ends: 32 [2022-02-23 21:19:39,947 INFO L226 Difference]: Without dead ends: 23 [2022-02-23 21:19:39,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-02-23 21:19:39,952 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:19:39,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 19 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:19:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-23 21:19:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-02-23 21:19:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 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) [2022-02-23 21:19:39,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-02-23 21:19:39,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2022-02-23 21:19:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:19:39,965 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-02-23 21:19:39,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-02-23 21:19:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-02-23 21:19:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-23 21:19:39,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:39,967 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:39,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 21:19:40,183 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 [2022-02-23 21:19:40,184 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:40,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1581176064, now seen corresponding path program 1 times [2022-02-23 21:19:40,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:40,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913365816] [2022-02-23 21:19:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:40,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:40,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 21:19:40,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:40,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913365816] [2022-02-23 21:19:40,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913365816] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:19:40,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:19:40,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 21:19:40,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851159402] [2022-02-23 21:19:40,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:19:40,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 21:19:40,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 21:19:40,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 21:19:40,251 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-02-23 21:19:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:19:40,289 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-02-23 21:19:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 21:19:40,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 19 [2022-02-23 21:19:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:19:40,291 INFO L225 Difference]: With dead ends: 35 [2022-02-23 21:19:40,291 INFO L226 Difference]: Without dead ends: 24 [2022-02-23 21:19:40,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 21:19:40,293 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:19:40,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:19:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-23 21:19:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-23 21:19:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 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) [2022-02-23 21:19:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-02-23 21:19:40,298 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2022-02-23 21:19:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:19:40,298 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-02-23 21:19:40,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-02-23 21:19:40,299 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-02-23 21:19:40,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 21:19:40,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:40,299 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:40,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 21:19:40,300 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:40,300 INFO L85 PathProgramCache]: Analyzing trace with hash 76189880, now seen corresponding path program 1 times [2022-02-23 21:19:40,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:40,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758796955] [2022-02-23 21:19:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:40,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:40,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 21:19:40,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:40,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758796955] [2022-02-23 21:19:40,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758796955] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:19:40,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188120704] [2022-02-23 21:19:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:40,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:40,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:19:40,354 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) [2022-02-23 21:19:40,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 21:19:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:40,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 21:19:40,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:19:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 21:19:40,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:19:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 21:19:40,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188120704] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:19:40,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:19:40,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-23 21:19:40,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397177590] [2022-02-23 21:19:40,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:19:40,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 21:19:40,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:40,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 21:19:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-23 21:19:40,544 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 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) [2022-02-23 21:19:40,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:19:40,643 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-02-23 21:19:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 21:19:40,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 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 23 [2022-02-23 21:19:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:19:40,645 INFO L225 Difference]: With dead ends: 46 [2022-02-23 21:19:40,645 INFO L226 Difference]: Without dead ends: 32 [2022-02-23 21:19:40,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-02-23 21:19:40,647 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:19:40,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:19:40,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-23 21:19:40,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-23 21:19:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 3 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) [2022-02-23 21:19:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-02-23 21:19:40,666 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2022-02-23 21:19:40,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:19:40,667 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-02-23 21:19:40,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 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) [2022-02-23 21:19:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-02-23 21:19:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 21:19:40,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:40,668 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:40,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 21:19:40,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:40,884 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:40,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash 200191536, now seen corresponding path program 2 times [2022-02-23 21:19:40,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:40,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696076348] [2022-02-23 21:19:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:40,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:40,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 21:19:40,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:40,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696076348] [2022-02-23 21:19:40,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696076348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:19:40,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628975742] [2022-02-23 21:19:40,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 21:19:40,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:40,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:19:40,996 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) [2022-02-23 21:19:40,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 21:19:41,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 21:19:41,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:19:41,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 21:19:41,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:19:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 21:19:41,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:19:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 21:19:41,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628975742] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:19:41,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:19:41,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-23 21:19:41,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390166869] [2022-02-23 21:19:41,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:19:41,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 21:19:41,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:41,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 21:19:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-02-23 21:19:41,278 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 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) [2022-02-23 21:19:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:19:41,486 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2022-02-23 21:19:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 21:19:41,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 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 31 [2022-02-23 21:19:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:19:41,488 INFO L225 Difference]: With dead ends: 62 [2022-02-23 21:19:41,488 INFO L226 Difference]: Without dead ends: 48 [2022-02-23 21:19:41,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-02-23 21:19:41,491 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:19:41,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 37 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:19:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-23 21:19:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-23 21:19:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 3 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) [2022-02-23 21:19:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-02-23 21:19:41,504 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 31 [2022-02-23 21:19:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:19:41,505 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-02-23 21:19:41,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 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) [2022-02-23 21:19:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-02-23 21:19:41,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 21:19:41,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:41,506 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:41,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 21:19:41,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:41,712 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:41,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:41,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2099511584, now seen corresponding path program 3 times [2022-02-23 21:19:41,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:41,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097447179] [2022-02-23 21:19:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:41,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:41,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 21:19:41,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:41,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097447179] [2022-02-23 21:19:41,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097447179] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:19:41,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714166176] [2022-02-23 21:19:41,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 21:19:41,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:41,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:19:41,900 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) [2022-02-23 21:19:41,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 21:19:41,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 21:19:41,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:19:41,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 21:19:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:19:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-02-23 21:19:42,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:19:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-02-23 21:19:42,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714166176] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:19:42,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:19:42,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4, 7] total 25 [2022-02-23 21:19:42,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96457786] [2022-02-23 21:19:42,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:19:42,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 21:19:42,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:42,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 21:19:42,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2022-02-23 21:19:42,196 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:19:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:19:42,629 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-02-23 21:19:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-23 21:19:42,629 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-23 21:19:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:19:42,630 INFO L225 Difference]: With dead ends: 79 [2022-02-23 21:19:42,630 INFO L226 Difference]: Without dead ends: 62 [2022-02-23 21:19:42,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=653, Invalid=1509, Unknown=0, NotChecked=0, Total=2162 [2022-02-23 21:19:42,631 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:19:42,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 47 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:19:42,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-23 21:19:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-23 21:19:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 states have internal predecessors, (67), 3 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) [2022-02-23 21:19:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-02-23 21:19:42,639 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 47 [2022-02-23 21:19:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:19:42,640 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-02-23 21:19:42,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:19:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-02-23 21:19:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-23 21:19:42,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:42,641 INFO L514 BasicCegarLoop]: trace histogram [20, 15, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:42,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 21:19:42,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:42,863 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:42,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:42,863 INFO L85 PathProgramCache]: Analyzing trace with hash 75572905, now seen corresponding path program 4 times [2022-02-23 21:19:42,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:42,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134708609] [2022-02-23 21:19:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:42,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:43,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 21:19:43,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:43,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134708609] [2022-02-23 21:19:43,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134708609] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:19:43,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763339995] [2022-02-23 21:19:43,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 21:19:43,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:43,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:19:43,059 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) [2022-02-23 21:19:43,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 21:19:43,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 21:19:43,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:19:43,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 21:19:43,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:19:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 21:19:43,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:19:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 21:19:43,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763339995] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:19:43,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:19:43,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-02-23 21:19:43,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133345709] [2022-02-23 21:19:43,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:19:43,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-23 21:19:43,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:43,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-23 21:19:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-02-23 21:19:43,635 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 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) [2022-02-23 21:19:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:19:44,240 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2022-02-23 21:19:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-23 21:19:44,240 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 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 61 [2022-02-23 21:19:44,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:19:44,241 INFO L225 Difference]: With dead ends: 122 [2022-02-23 21:19:44,241 INFO L226 Difference]: Without dead ends: 96 [2022-02-23 21:19:44,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-02-23 21:19:44,244 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:19:44,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 42 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:19:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-23 21:19:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-02-23 21:19:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 states have internal predecessors, (101), 3 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) [2022-02-23 21:19:44,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2022-02-23 21:19:44,257 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 61 [2022-02-23 21:19:44,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:19:44,258 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2022-02-23 21:19:44,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 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) [2022-02-23 21:19:44,258 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2022-02-23 21:19:44,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-23 21:19:44,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:44,265 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:44,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 21:19:44,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:44,480 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:44,480 INFO L85 PathProgramCache]: Analyzing trace with hash 377058471, now seen corresponding path program 5 times [2022-02-23 21:19:44,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:44,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514749822] [2022-02-23 21:19:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:44,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:45,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 297 proven. 1056 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 21:19:45,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:45,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514749822] [2022-02-23 21:19:45,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514749822] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:19:45,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122435879] [2022-02-23 21:19:45,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 21:19:45,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:45,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:19:45,050 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:19:45,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 21:19:45,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-02-23 21:19:45,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:19:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 21:19:45,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:19:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-02-23 21:19:45,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:19:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-02-23 21:19:46,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122435879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:19:46,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:19:46,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 17, 17] total 66 [2022-02-23 21:19:46,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63173094] [2022-02-23 21:19:46,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:19:46,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-23 21:19:46,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:46,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-23 21:19:46,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-02-23 21:19:46,442 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 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) [2022-02-23 21:19:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:19:48,423 INFO L93 Difference]: Finished difference Result 240 states and 317 transitions. [2022-02-23 21:19:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-23 21:19:48,423 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 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 95 [2022-02-23 21:19:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:19:48,424 INFO L225 Difference]: With dead ends: 240 [2022-02-23 21:19:48,424 INFO L226 Difference]: Without dead ends: 214 [2022-02-23 21:19:48,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-02-23 21:19:48,431 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 308 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 21:19:48,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 35 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 21:19:48,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-23 21:19:48,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-02-23 21:19:48,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.186602870813397) internal successors, (248), 209 states have internal predecessors, (248), 3 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) [2022-02-23 21:19:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 252 transitions. [2022-02-23 21:19:48,447 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 252 transitions. Word has length 95 [2022-02-23 21:19:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:19:48,448 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 252 transitions. [2022-02-23 21:19:48,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 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) [2022-02-23 21:19:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 252 transitions. [2022-02-23 21:19:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-02-23 21:19:48,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:48,450 INFO L514 BasicCegarLoop]: trace histogram [67, 34, 34, 33, 30, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:48,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 21:19:48,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:48,672 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1709022179, now seen corresponding path program 6 times [2022-02-23 21:19:48,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:48,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151316288] [2022-02-23 21:19:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:48,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:49,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2022-02-23 21:19:49,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:49,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151316288] [2022-02-23 21:19:49,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151316288] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:19:49,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902885999] [2022-02-23 21:19:49,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 21:19:49,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:49,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:19:49,228 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:19:49,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 21:19:49,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-02-23 21:19:49,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:19:49,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 21:19:49,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:19:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-02-23 21:19:49,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:19:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-02-23 21:19:50,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902885999] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:19:50,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:19:50,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 7, 10] total 50 [2022-02-23 21:19:50,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411167205] [2022-02-23 21:19:50,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:19:50,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-23 21:19:50,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:50,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-23 21:19:50,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1044, Invalid=1406, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 21:19:50,145 INFO L87 Difference]: Start difference. First operand 214 states and 252 transitions. Second operand has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:19:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:19:51,241 INFO L93 Difference]: Finished difference Result 385 states and 480 transitions. [2022-02-23 21:19:51,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-23 21:19:51,242 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-02-23 21:19:51,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:19:51,243 INFO L225 Difference]: With dead ends: 385 [2022-02-23 21:19:51,243 INFO L226 Difference]: Without dead ends: 240 [2022-02-23 21:19:51,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3128, Invalid=6184, Unknown=0, NotChecked=0, Total=9312 [2022-02-23 21:19:51,246 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 129 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 21:19:51,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 37 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 21:19:51,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-23 21:19:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-02-23 21:19:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2170212765957447) internal successors, (286), 235 states have internal predecessors, (286), 3 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) [2022-02-23 21:19:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 290 transitions. [2022-02-23 21:19:51,262 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 290 transitions. Word has length 213 [2022-02-23 21:19:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:19:51,263 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 290 transitions. [2022-02-23 21:19:51,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:19:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 290 transitions. [2022-02-23 21:19:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-23 21:19:51,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:51,265 INFO L514 BasicCegarLoop]: trace histogram [74, 40, 40, 34, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:51,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 21:19:51,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:51,467 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:51,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1030847343, now seen corresponding path program 7 times [2022-02-23 21:19:51,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:51,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73486456] [2022-02-23 21:19:51,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:51,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:52,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 21:19:52,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:52,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73486456] [2022-02-23 21:19:52,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73486456] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:19:52,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25909099] [2022-02-23 21:19:52,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 21:19:52,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:52,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:19:52,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:19:52,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 21:19:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:52,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-23 21:19:52,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:19:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 21:19:52,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:19:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 21:19:53,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25909099] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:19:53,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:19:53,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-02-23 21:19:53,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189308560] [2022-02-23 21:19:53,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:19:53,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-23 21:19:53,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:53,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-23 21:19:53,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-02-23 21:19:53,959 INFO L87 Difference]: Start difference. First operand 240 states and 290 transitions. Second operand has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 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) [2022-02-23 21:19:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:19:55,817 INFO L93 Difference]: Finished difference Result 478 states and 614 transitions. [2022-02-23 21:19:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-23 21:19:55,818 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 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 239 [2022-02-23 21:19:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:19:55,820 INFO L225 Difference]: With dead ends: 478 [2022-02-23 21:19:55,820 INFO L226 Difference]: Without dead ends: 312 [2022-02-23 21:19:55,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7741, Invalid=12851, Unknown=0, NotChecked=0, Total=20592 [2022-02-23 21:19:55,825 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 21:19:55,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 21:19:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-23 21:19:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-02-23 21:19:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.1661237785016287) internal successors, (358), 307 states have internal predecessors, (358), 3 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) [2022-02-23 21:19:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 362 transitions. [2022-02-23 21:19:55,849 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 362 transitions. Word has length 239 [2022-02-23 21:19:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:19:55,849 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 362 transitions. [2022-02-23 21:19:55,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 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) [2022-02-23 21:19:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 362 transitions. [2022-02-23 21:19:55,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-02-23 21:19:55,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:55,853 INFO L514 BasicCegarLoop]: trace histogram [110, 70, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:55,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 21:19:56,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 21:19:56,075 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:56,075 INFO L85 PathProgramCache]: Analyzing trace with hash -488290871, now seen corresponding path program 8 times [2022-02-23 21:19:56,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:56,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025570677] [2022-02-23 21:19:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:56,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:57,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 21:19:57,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:57,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025570677] [2022-02-23 21:19:57,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025570677] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:19:57,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561779174] [2022-02-23 21:19:57,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 21:19:57,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:57,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:19:57,884 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:19:57,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 21:19:58,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 21:19:58,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:19:58,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 72 conjunts are in the unsatisfiable core [2022-02-23 21:19:58,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:19:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 21:19:58,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:20:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 21:20:03,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561779174] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:20:03,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:20:03,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-02-23 21:20:03,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704586863] [2022-02-23 21:20:03,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:20:03,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-02-23 21:20:03,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:20:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-02-23 21:20:03,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-02-23 21:20:03,339 INFO L87 Difference]: Start difference. First operand 312 states and 362 transitions. Second operand has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 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) [2022-02-23 21:20:10,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:20:10,142 INFO L93 Difference]: Finished difference Result 622 states and 794 transitions. [2022-02-23 21:20:10,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-02-23 21:20:10,142 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 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 311 [2022-02-23 21:20:10,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:20:10,144 INFO L225 Difference]: With dead ends: 622 [2022-02-23 21:20:10,144 INFO L226 Difference]: Without dead ends: 456 [2022-02-23 21:20:10,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12916 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=31033, Invalid=51623, Unknown=0, NotChecked=0, Total=82656 [2022-02-23 21:20:10,151 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 21:20:10,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 42 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 21:20:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-02-23 21:20:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2022-02-23 21:20:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 451 states have (on average 1.1130820399113082) internal successors, (502), 451 states have internal predecessors, (502), 3 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) [2022-02-23 21:20:10,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 506 transitions. [2022-02-23 21:20:10,168 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 506 transitions. Word has length 311 [2022-02-23 21:20:10,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:20:10,169 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 506 transitions. [2022-02-23 21:20:10,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 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) [2022-02-23 21:20:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 506 transitions. [2022-02-23 21:20:10,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-02-23 21:20:10,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:20:10,176 INFO L514 BasicCegarLoop]: trace histogram [182, 142, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:20:10,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 21:20:10,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:10,395 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:20:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:20:10,396 INFO L85 PathProgramCache]: Analyzing trace with hash -158375879, now seen corresponding path program 9 times [2022-02-23 21:20:10,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:20:10,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441368535] [2022-02-23 21:20:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:10,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:20:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:16,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:20:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 11297 proven. 20306 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 21:20:16,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:20:16,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441368535] [2022-02-23 21:20:16,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441368535] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:20:16,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123619212] [2022-02-23 21:20:16,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 21:20:16,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:16,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:20:16,740 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:20:16,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 21:20:16,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-02-23 21:20:16,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:20:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 21:20:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:20:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-02-23 21:20:18,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:20:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-02-23 21:20:19,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123619212] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:20:19,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:20:19,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 13, 16] total 171 [2022-02-23 21:20:19,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474510156] [2022-02-23 21:20:19,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:20:19,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-02-23 21:20:19,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:20:19,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-02-23 21:20:19,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13870, Invalid=15200, Unknown=0, NotChecked=0, Total=29070 [2022-02-23 21:20:19,952 INFO L87 Difference]: Start difference. First operand 456 states and 506 transitions. Second operand has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:20:30,516 INFO L93 Difference]: Finished difference Result 675 states and 812 transitions. [2022-02-23 21:20:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-02-23 21:20:30,516 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2022-02-23 21:20:30,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:20:30,518 INFO L225 Difference]: With dead ends: 675 [2022-02-23 21:20:30,518 INFO L226 Difference]: Without dead ends: 506 [2022-02-23 21:20:30,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1245 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14711 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=41606, Invalid=72976, Unknown=0, NotChecked=0, Total=114582 [2022-02-23 21:20:30,524 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 407 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 968 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 968 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 21:20:30,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 57 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [968 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 21:20:30,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-02-23 21:20:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2022-02-23 21:20:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 501 states have (on average 1.1497005988023952) internal successors, (576), 501 states have internal predecessors, (576), 3 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) [2022-02-23 21:20:30,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 580 transitions. [2022-02-23 21:20:30,541 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 580 transitions. Word has length 455 [2022-02-23 21:20:30,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:20:30,541 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 580 transitions. [2022-02-23 21:20:30,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:30,542 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 580 transitions. [2022-02-23 21:20:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-02-23 21:20:30,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:20:30,545 INFO L514 BasicCegarLoop]: trace histogram [195, 143, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:20:30,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-02-23 21:20:30,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 21:20:30,759 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:20:30,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:20:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1120053885, now seen corresponding path program 10 times [2022-02-23 21:20:30,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:20:30,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973354302] [2022-02-23 21:20:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:30,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:20:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:37,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:20:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-02-23 21:20:37,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:20:37,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973354302] [2022-02-23 21:20:37,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973354302] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:20:37,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120126445] [2022-02-23 21:20:37,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 21:20:37,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:37,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:20:37,136 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:20:37,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 21:20:37,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 21:20:37,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:20:37,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 145 conjunts are in the unsatisfiable core [2022-02-23 21:20:37,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:20:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-02-23 21:20:38,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:20:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-02-23 21:20:56,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120126445] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:20:56,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:20:56,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 146, 146] total 292 [2022-02-23 21:20:56,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865352762] [2022-02-23 21:20:56,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:20:56,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 292 states [2022-02-23 21:20:56,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:20:56,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 292 interpolants. [2022-02-23 21:20:56,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42197, Invalid=42775, Unknown=0, NotChecked=0, Total=84972 [2022-02-23 21:20:56,860 INFO L87 Difference]: Start difference. First operand 506 states and 580 transitions. Second operand has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 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) [2022-02-23 21:21:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:21:23,292 INFO L93 Difference]: Finished difference Result 1010 states and 1303 transitions. [2022-02-23 21:21:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-02-23 21:21:23,293 INFO L78 Accepts]: Start accepts. Automaton has has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 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 505 [2022-02-23 21:21:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:21:23,296 INFO L225 Difference]: With dead ends: 1010 [2022-02-23 21:21:23,296 INFO L226 Difference]: Without dead ends: 796 [2022-02-23 21:21:23,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1445 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 578 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52482 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=126006, Invalid=209814, Unknown=0, NotChecked=0, Total=335820 [2022-02-23 21:21:23,314 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 299 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 21:21:23,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 37 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 21:21:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-02-23 21:21:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2022-02-23 21:21:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 791 states have (on average 1.0948166877370418) internal successors, (866), 791 states have internal predecessors, (866), 3 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) [2022-02-23 21:21:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 870 transitions. [2022-02-23 21:21:23,346 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 870 transitions. Word has length 505 [2022-02-23 21:21:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:21:23,347 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 870 transitions. [2022-02-23 21:21:23,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 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) [2022-02-23 21:21:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 870 transitions. [2022-02-23 21:21:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-02-23 21:21:23,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:21:23,353 INFO L514 BasicCegarLoop]: trace histogram [340, 288, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:21:23,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-23 21:21:23,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 21:21:23,567 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:21:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:21:23,568 INFO L85 PathProgramCache]: Analyzing trace with hash -780439167, now seen corresponding path program 11 times [2022-02-23 21:21:23,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:21:23,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104751853] [2022-02-23 21:21:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:21:23,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:21:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:21:48,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:21:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:21:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 29767 proven. 83232 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-02-23 21:21:48,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:21:48,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104751853] [2022-02-23 21:21:48,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104751853] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:21:48,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671163225] [2022-02-23 21:21:48,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 21:21:48,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:21:48,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:21:48,818 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:21:48,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 21:21:49,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 298 check-sat command(s) [2022-02-23 21:21:49,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:21:49,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 151 conjunts are in the unsatisfiable core [2022-02-23 21:21:49,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:22:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-02-23 21:22:23,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:23:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-02-23 21:23:10,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671163225] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:23:10,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:23:10,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [292, 151, 151] total 590 [2022-02-23 21:23:10,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651921719] [2022-02-23 21:23:10,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:23:10,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 590 states [2022-02-23 21:23:10,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:23:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 590 interpolants. [2022-02-23 21:23:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173168, Invalid=174342, Unknown=0, NotChecked=0, Total=347510 [2022-02-23 21:23:10,398 INFO L87 Difference]: Start difference. First operand 796 states and 870 transitions. Second operand has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 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) [2022-02-23 21:28:20,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:28:20,494 INFO L93 Difference]: Finished difference Result 2084 states and 2769 transitions. [2022-02-23 21:28:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 590 states. [2022-02-23 21:28:20,495 INFO L78 Accepts]: Start accepts. Automaton has has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 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 795 [2022-02-23 21:28:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:28:20,503 INFO L225 Difference]: With dead ends: 2084 [2022-02-23 21:28:20,503 INFO L226 Difference]: Without dead ends: 1870 [2022-02-23 21:28:20,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2767 GetRequests, 1592 SyntacticMatches, 0 SemanticMatches, 1175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183157 ImplicationChecksByTransitivity, 219.6s TimeCoverageRelationStatistics Valid=519498, Invalid=864654, Unknown=0, NotChecked=0, Total=1384152 [2022-02-23 21:28:20,613 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3702 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 5321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3702 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5321 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:28:20,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3702 Valid, 50 Invalid, 7152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5321 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-23 21:28:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-02-23 21:28:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1870. [2022-02-23 21:28:20,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1865 states have (on average 1.1839142091152814) internal successors, (2208), 1865 states have internal predecessors, (2208), 3 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) [2022-02-23 21:28:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2212 transitions. [2022-02-23 21:28:20,668 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2212 transitions. Word has length 795 [2022-02-23 21:28:20,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:28:20,668 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2212 transitions. [2022-02-23 21:28:20,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 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) [2022-02-23 21:28:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2212 transitions. [2022-02-23 21:28:20,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1870 [2022-02-23 21:28:20,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:28:20,695 INFO L514 BasicCegarLoop]: trace histogram [609, 320, 320, 298, 289, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:28:20,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 21:28:20,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-23 21:28:20,896 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:28:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:28:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2022732223, now seen corresponding path program 12 times [2022-02-23 21:28:20,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:28:20,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280194443] [2022-02-23 21:28:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:28:20,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:28:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:28:47,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:28:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:28:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 185310 proven. 83810 refuted. 0 times theorem prover too weak. 203841 trivial. 0 not checked. [2022-02-23 21:28:47,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:28:47,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280194443] [2022-02-23 21:28:47,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280194443] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:28:47,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018775607] [2022-02-23 21:28:47,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 21:28:47,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:28:47,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:28:47,456 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:28:47,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 21:28:47,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-02-23 21:28:47,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:28:47,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-23 21:28:47,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:28:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2022-02-23 21:28:53,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:29:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2022-02-23 21:29:00,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018775607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:29:00,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:29:00,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [293, 25, 28] total 342 [2022-02-23 21:29:00,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909189133] [2022-02-23 21:29:00,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:29:00,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 342 states [2022-02-23 21:29:00,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:29:00,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 342 interpolants. [2022-02-23 21:29:00,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56962, Invalid=59660, Unknown=0, NotChecked=0, Total=116622 [2022-02-23 21:29:00,311 INFO L87 Difference]: Start difference. First operand 1870 states and 2212 transitions. Second operand has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:29:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:29:45,613 INFO L93 Difference]: Finished difference Result 3257 states and 4014 transitions. [2022-02-23 21:29:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 342 states. [2022-02-23 21:29:45,614 INFO L78 Accepts]: Start accepts. Automaton has has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1869 [2022-02-23 21:29:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:29:45,620 INFO L225 Difference]: With dead ends: 3257 [2022-02-23 21:29:45,620 INFO L226 Difference]: Without dead ends: 1968 [2022-02-23 21:29:45,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4415 GetRequests, 3736 SyntacticMatches, 0 SemanticMatches, 679 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58832 ImplicationChecksByTransitivity, 73.1s TimeCoverageRelationStatistics Valid=170882, Invalid=292198, Unknown=0, NotChecked=0, Total=463080 [2022-02-23 21:29:45,643 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 821 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 2015 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2015 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 21:29:45,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 62 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2015 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 21:29:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-02-23 21:29:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1968. [2022-02-23 21:29:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1963 states have (on average 1.1991849210392256) internal successors, (2354), 1963 states have internal predecessors, (2354), 3 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) [2022-02-23 21:29:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2358 transitions. [2022-02-23 21:29:45,698 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2358 transitions. Word has length 1869 [2022-02-23 21:29:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:29:45,699 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2358 transitions. [2022-02-23 21:29:45,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:29:45,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2358 transitions. [2022-02-23 21:29:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1968 [2022-02-23 21:29:45,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:29:45,727 INFO L514 BasicCegarLoop]: trace histogram [634, 344, 344, 298, 290, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:29:45,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 21:29:45,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 21:29:45,935 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:29:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:29:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash -970120395, now seen corresponding path program 13 times [2022-02-23 21:29:45,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:29:45,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882242298] [2022-02-23 21:29:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:29:45,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:29:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:30:12,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:30:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:30:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-02-23 21:30:12,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:30:12,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882242298] [2022-02-23 21:30:12,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882242298] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:30:12,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068170276] [2022-02-23 21:30:12,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 21:30:12,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:30:12,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:30:12,868 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:30:12,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 21:30:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:30:13,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 3623 conjuncts, 292 conjunts are in the unsatisfiable core [2022-02-23 21:30:13,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:30:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-02-23 21:30:15,760 INFO L328 TraceCheckSpWp]: Computing backward predicates...