/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 02:11:42,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 02:11:42,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 02:11:42,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 02:11:42,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 02:11:42,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 02:11:42,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 02:11:42,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 02:11:42,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 02:11:42,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 02:11:42,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 02:11:42,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 02:11:42,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 02:11:42,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 02:11:42,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 02:11:42,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 02:11:42,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 02:11:42,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 02:11:42,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 02:11:42,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 02:11:42,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 02:11:42,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 02:11:42,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 02:11:42,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 02:11:42,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 02:11:42,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 02:11:42,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 02:11:42,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 02:11:42,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 02:11:42,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 02:11:42,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 02:11:42,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 02:11:42,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 02:11:42,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 02:11:42,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 02:11:42,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 02:11:42,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 02:11:42,178 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 02:11:42,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 02:11:42,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 02:11:42,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 02:11:42,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 02:11:42,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 02:11:42,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 02:11:42,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 02:11:42,181 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 02:11:42,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 02:11:42,181 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 02:11:42,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 02:11:42,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 02:11:42,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 02:11:42,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 02:11:42,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 02:11:42,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 02:11:42,183 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 02:11:42,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 02:11:42,183 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 02:11:42,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 02:11:42,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 02:11:42,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 02:11:42,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 02:11:42,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:11:42,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 02:11:42,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 02:11:42,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 02:11:42,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 02:11:42,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 02:11:42,185 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 02:11:42,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 02:11:42,185 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 02:11:42,185 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 02:11:42,185 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 02:11:42,185 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 02:11:42,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 02:11:42,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 02:11:42,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 02:11:42,419 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 02:11:42,420 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 02:11:42,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2023-04-02 02:11:43,603 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 02:11:43,771 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 02:11:43,771 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2023-04-02 02:11:43,777 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22dbd150a/8168c09242ac41459eb1a616a3a340e4/FLAGf6e0a55f0 [2023-04-02 02:11:43,788 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22dbd150a/8168c09242ac41459eb1a616a3a340e4 [2023-04-02 02:11:43,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 02:11:43,791 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 02:11:43,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 02:11:43,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 02:11:43,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 02:11:43,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:11:43" (1/1) ... [2023-04-02 02:11:43,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348f7ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:43, skipping insertion in model container [2023-04-02 02:11:43,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:11:43" (1/1) ... [2023-04-02 02:11:43,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 02:11:43,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 02:11:43,932 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2023-04-02 02:11:43,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:11:43,959 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 02:11:43,967 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2023-04-02 02:11:43,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:11:43,984 INFO L208 MainTranslator]: Completed translation [2023-04-02 02:11:43,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:43 WrapperNode [2023-04-02 02:11:43,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 02:11:43,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 02:11:43,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 02:11:43,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 02:11:43,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:43" (1/1) ... [2023-04-02 02:11:43,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:43" (1/1) ... [2023-04-02 02:11:43,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:43" (1/1) ... [2023-04-02 02:11:43,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:43" (1/1) ... [2023-04-02 02:11:44,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:43" (1/1) ... [2023-04-02 02:11:44,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:43" (1/1) ... [2023-04-02 02:11:44,005 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:43" (1/1) ... [2023-04-02 02:11:44,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:43" (1/1) ... [2023-04-02 02:11:44,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 02:11:44,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 02:11:44,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 02:11:44,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 02:11:44,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:43" (1/1) ... [2023-04-02 02:11:44,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:11:44,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:44,036 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) [2023-04-02 02:11:44,037 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 [2023-04-02 02:11:44,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 02:11:44,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 02:11:44,072 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 02:11:44,073 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 02:11:44,073 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 02:11:44,073 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 02:11:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 02:11:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 02:11:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 02:11:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 02:11:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 02:11:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 02:11:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 02:11:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 02:11:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 02:11:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 02:11:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 02:11:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 02:11:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 02:11:44,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 02:11:44,140 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 02:11:44,142 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 02:11:44,354 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 02:11:44,359 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 02:11:44,359 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 02:11:44,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:11:44 BoogieIcfgContainer [2023-04-02 02:11:44,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 02:11:44,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 02:11:44,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 02:11:44,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 02:11:44,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:11:43" (1/3) ... [2023-04-02 02:11:44,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366a258c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:11:44, skipping insertion in model container [2023-04-02 02:11:44,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:43" (2/3) ... [2023-04-02 02:11:44,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366a258c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:11:44, skipping insertion in model container [2023-04-02 02:11:44,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:11:44" (3/3) ... [2023-04-02 02:11:44,367 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2023-04-02 02:11:44,381 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 02:11:44,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 02:11:44,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 02:11:44,425 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@f2e34bf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 02:11:44,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 02:11:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 02:11:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 02:11:44,436 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:44,437 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:44,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:44,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:44,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2023-04-02 02:11:44,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:44,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884020677] [2023-04-02 02:11:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:44,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:11:44,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:44,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884020677] [2023-04-02 02:11:44,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 02:11:44,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536670372] [2023-04-02 02:11:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:44,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:44,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:44,652 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) [2023-04-02 02:11:44,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 02:11:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:11:44,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 02:11:44,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 02:11:44,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:11:44,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536670372] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:11:44,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:11:44,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 02:11:44,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492383564] [2023-04-02 02:11:44,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:11:44,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 02:11:44,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 02:11:44,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:11:44,819 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:11:44,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:44,848 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2023-04-02 02:11:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 02:11:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2023-04-02 02:11:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:44,857 INFO L225 Difference]: With dead ends: 73 [2023-04-02 02:11:44,857 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 02:11:44,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:11:44,866 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:44,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:11:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 02:11:44,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-02 02:11:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 02:11:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2023-04-02 02:11:44,912 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2023-04-02 02:11:44,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:44,912 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2023-04-02 02:11:44,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:11:44,913 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2023-04-02 02:11:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 02:11:44,914 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:44,914 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:44,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 02:11:45,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 02:11:45,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:45,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:45,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2023-04-02 02:11:45,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:45,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63254823] [2023-04-02 02:11:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:45,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:45,153 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:45,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332555919] [2023-04-02 02:11:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:45,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:45,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:45,155 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) [2023-04-02 02:11:45,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 02:11:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:11:45,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:11:45,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:11:45,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:11:45,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:45,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63254823] [2023-04-02 02:11:45,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:45,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332555919] [2023-04-02 02:11:45,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332555919] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:11:45,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:11:45,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 02:11:45,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837435246] [2023-04-02 02:11:45,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:11:45,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:11:45,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:11:45,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:11:45,321 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:11:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:45,452 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2023-04-02 02:11:45,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:11:45,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2023-04-02 02:11:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:45,456 INFO L225 Difference]: With dead ends: 54 [2023-04-02 02:11:45,456 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 02:11:45,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-02 02:11:45,458 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:45,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 121 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:11:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 02:11:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2023-04-02 02:11:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 02:11:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2023-04-02 02:11:45,481 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2023-04-02 02:11:45,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:45,481 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2023-04-02 02:11:45,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:11:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2023-04-02 02:11:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-02 02:11:45,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:45,484 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:45,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 02:11:45,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 02:11:45,690 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:45,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:45,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2023-04-02 02:11:45,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:45,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734226037] [2023-04-02 02:11:45,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:45,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:45,722 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:45,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336579285] [2023-04-02 02:11:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:45,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:45,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:45,724 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) [2023-04-02 02:11:45,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 02:11:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:11:45,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:11:45,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:11:45,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:11:45,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:45,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734226037] [2023-04-02 02:11:45,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:45,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336579285] [2023-04-02 02:11:45,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336579285] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:11:45,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:11:45,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 02:11:45,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789885214] [2023-04-02 02:11:45,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:11:45,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 02:11:45,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:45,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 02:11:45,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 02:11:45,951 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:11:46,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:46,068 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-04-02 02:11:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:11:46,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2023-04-02 02:11:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:46,071 INFO L225 Difference]: With dead ends: 53 [2023-04-02 02:11:46,071 INFO L226 Difference]: Without dead ends: 51 [2023-04-02 02:11:46,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:11:46,074 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:46,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 169 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:11:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-02 02:11:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-04-02 02:11:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 02:11:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2023-04-02 02:11:46,098 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2023-04-02 02:11:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:46,098 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2023-04-02 02:11:46,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:11:46,099 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2023-04-02 02:11:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 02:11:46,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:46,100 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:46,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 02:11:46,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:46,305 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:46,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:46,306 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2023-04-02 02:11:46,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:46,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703167485] [2023-04-02 02:11:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:46,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:46,328 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:46,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694495008] [2023-04-02 02:11:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:46,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:46,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:46,330 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) [2023-04-02 02:11:46,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 02:11:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:11:46,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 02:11:46,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:11:46,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:11:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:11:46,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:46,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703167485] [2023-04-02 02:11:46,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:46,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694495008] [2023-04-02 02:11:46,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694495008] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:11:46,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:11:46,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-04-02 02:11:46,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366744230] [2023-04-02 02:11:46,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:11:46,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 02:11:46,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:46,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 02:11:46,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 02:11:46,570 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:11:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:46,767 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2023-04-02 02:11:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 02:11:46,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-04-02 02:11:46,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:46,770 INFO L225 Difference]: With dead ends: 103 [2023-04-02 02:11:46,770 INFO L226 Difference]: Without dead ends: 96 [2023-04-02 02:11:46,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:11:46,771 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 64 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:46,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 205 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:11:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-02 02:11:46,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2023-04-02 02:11:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-02 02:11:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2023-04-02 02:11:46,786 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2023-04-02 02:11:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:46,787 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2023-04-02 02:11:46,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 02:11:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2023-04-02 02:11:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 02:11:46,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:46,788 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:46,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 02:11:46,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:46,994 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:46,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:46,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2023-04-02 02:11:46,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:46,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430736611] [2023-04-02 02:11:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:46,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:47,014 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:47,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852021416] [2023-04-02 02:11:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:47,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:47,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:47,016 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) [2023-04-02 02:11:47,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 02:11:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:11:47,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-02 02:11:47,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 02:11:47,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:11:47,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:47,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430736611] [2023-04-02 02:11:47,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:47,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852021416] [2023-04-02 02:11:47,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852021416] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:11:47,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:11:47,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-04-02 02:11:47,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642653853] [2023-04-02 02:11:47,677 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:11:47,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 02:11:47,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:47,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 02:11:47,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-04-02 02:11:47,678 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 02:11:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:48,036 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2023-04-02 02:11:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 02:11:48,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2023-04-02 02:11:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:48,038 INFO L225 Difference]: With dead ends: 86 [2023-04-02 02:11:48,038 INFO L226 Difference]: Without dead ends: 84 [2023-04-02 02:11:48,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-04-02 02:11:48,039 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:48,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 177 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 02:11:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-02 02:11:48,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2023-04-02 02:11:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-02 02:11:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2023-04-02 02:11:48,054 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2023-04-02 02:11:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:48,054 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2023-04-02 02:11:48,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 02:11:48,055 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2023-04-02 02:11:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 02:11:48,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:48,056 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:48,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 02:11:48,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:48,262 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:48,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2023-04-02 02:11:48,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:48,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982797423] [2023-04-02 02:11:48,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:48,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:48,275 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:48,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076976243] [2023-04-02 02:11:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:48,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:48,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:48,278 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) [2023-04-02 02:11:48,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 02:11:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:11:48,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 02:11:48,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:11:48,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:11:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 02:11:48,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:48,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982797423] [2023-04-02 02:11:48,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:48,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076976243] [2023-04-02 02:11:48,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076976243] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:11:48,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:11:48,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-04-02 02:11:48,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941929797] [2023-04-02 02:11:48,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:11:48,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 02:11:48,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:48,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 02:11:48,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:11:48,534 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 10 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:11:49,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:49,067 INFO L93 Difference]: Finished difference Result 111 states and 147 transitions. [2023-04-02 02:11:49,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 02:11:49,068 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 10 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-04-02 02:11:49,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:49,069 INFO L225 Difference]: With dead ends: 111 [2023-04-02 02:11:49,069 INFO L226 Difference]: Without dead ends: 109 [2023-04-02 02:11:49,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-04-02 02:11:49,070 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 39 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:49,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 324 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 02:11:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-02 02:11:49,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2023-04-02 02:11:49,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-02 02:11:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2023-04-02 02:11:49,090 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2023-04-02 02:11:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:49,090 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2023-04-02 02:11:49,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 10 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:11:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2023-04-02 02:11:49,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 02:11:49,091 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:49,091 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:49,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 02:11:49,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:49,297 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:49,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:49,298 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2023-04-02 02:11:49,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:49,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773604276] [2023-04-02 02:11:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:49,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:49,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:49,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137309940] [2023-04-02 02:11:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:49,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:49,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:49,310 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) [2023-04-02 02:11:49,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 02:11:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:11:49,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 02:11:49,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 02:11:49,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:11:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 02:11:49,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773604276] [2023-04-02 02:11:49,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137309940] [2023-04-02 02:11:49,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137309940] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:11:49,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:11:49,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-04-02 02:11:49,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341652690] [2023-04-02 02:11:49,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:11:49,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:11:49,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:49,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:11:49,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:11:49,999 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:11:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:50,069 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2023-04-02 02:11:50,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:11:50,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-04-02 02:11:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:50,071 INFO L225 Difference]: With dead ends: 151 [2023-04-02 02:11:50,071 INFO L226 Difference]: Without dead ends: 149 [2023-04-02 02:11:50,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-04-02 02:11:50,074 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:50,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:11:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-04-02 02:11:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2023-04-02 02:11:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-04-02 02:11:50,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2023-04-02 02:11:50,116 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2023-04-02 02:11:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:50,117 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2023-04-02 02:11:50,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:11:50,117 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2023-04-02 02:11:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 02:11:50,121 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:50,121 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:50,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 02:11:50,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:50,327 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:50,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:50,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2023-04-02 02:11:50,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:50,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845235102] [2023-04-02 02:11:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:50,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:50,345 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:50,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216900090] [2023-04-02 02:11:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:50,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:50,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:50,348 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) [2023-04-02 02:11:50,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 02:11:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:11:50,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-02 02:11:50,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 02:11:50,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:11:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 02:11:50,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:50,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845235102] [2023-04-02 02:11:50,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:50,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216900090] [2023-04-02 02:11:50,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216900090] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:11:50,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:11:50,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2023-04-02 02:11:50,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811393245] [2023-04-02 02:11:50,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:11:50,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 02:11:50,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:50,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 02:11:50,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-04-02 02:11:50,864 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-02 02:11:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:54,304 INFO L93 Difference]: Finished difference Result 186 states and 258 transitions. [2023-04-02 02:11:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 02:11:54,305 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2023-04-02 02:11:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:54,307 INFO L225 Difference]: With dead ends: 186 [2023-04-02 02:11:54,307 INFO L226 Difference]: Without dead ends: 184 [2023-04-02 02:11:54,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 02:11:54,309 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 137 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:54,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 236 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 02:11:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-04-02 02:11:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2023-04-02 02:11:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 112 states have (on average 1.2589285714285714) internal successors, (141), 116 states have internal predecessors, (141), 53 states have call successors, (53), 10 states have call predecessors, (53), 9 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2023-04-02 02:11:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 245 transitions. [2023-04-02 02:11:54,376 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 245 transitions. Word has length 47 [2023-04-02 02:11:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:54,376 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 245 transitions. [2023-04-02 02:11:54,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-02 02:11:54,377 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 245 transitions. [2023-04-02 02:11:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 02:11:54,379 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:54,379 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:54,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 02:11:54,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 02:11:54,584 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:54,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:54,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2023-04-02 02:11:54,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:54,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020722920] [2023-04-02 02:11:54,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:54,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:54,595 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:54,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372476889] [2023-04-02 02:11:54,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:11:54,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:54,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:54,609 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) [2023-04-02 02:11:54,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 02:11:54,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:11:54,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:11:54,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 02:11:54,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 02:11:54,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:11:54,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:54,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020722920] [2023-04-02 02:11:54,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:54,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372476889] [2023-04-02 02:11:54,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372476889] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:11:54,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:11:54,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 02:11:54,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538397753] [2023-04-02 02:11:54,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:11:54,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:11:54,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:54,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:11:54,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:11:54,686 INFO L87 Difference]: Start difference. First operand 175 states and 245 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:11:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:54,803 INFO L93 Difference]: Finished difference Result 221 states and 305 transitions. [2023-04-02 02:11:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:11:54,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2023-04-02 02:11:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:54,804 INFO L225 Difference]: With dead ends: 221 [2023-04-02 02:11:54,804 INFO L226 Difference]: Without dead ends: 140 [2023-04-02 02:11:54,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 02:11:54,810 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:54,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 151 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:11:54,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-04-02 02:11:54,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2023-04-02 02:11:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 75 states have internal predecessors, (85), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-04-02 02:11:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2023-04-02 02:11:54,849 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 47 [2023-04-02 02:11:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:54,849 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2023-04-02 02:11:54,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 02:11:54,850 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2023-04-02 02:11:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 02:11:54,850 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:54,850 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:54,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 02:11:55,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:55,056 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:55,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:55,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2023-04-02 02:11:55,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:55,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554908223] [2023-04-02 02:11:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:55,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:55,069 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:55,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515076393] [2023-04-02 02:11:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:55,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:55,082 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) [2023-04-02 02:11:55,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 02:11:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:11:55,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 02:11:55,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 02:11:55,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:11:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 02:11:55,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:55,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554908223] [2023-04-02 02:11:55,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:55,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515076393] [2023-04-02 02:11:55,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515076393] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:11:55,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:11:55,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-02 02:11:55,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020632356] [2023-04-02 02:11:55,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:11:55,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:11:55,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:55,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:11:55,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:11:55,256 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 02:11:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:55,332 INFO L93 Difference]: Finished difference Result 123 states and 158 transitions. [2023-04-02 02:11:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:11:55,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2023-04-02 02:11:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:55,333 INFO L225 Difference]: With dead ends: 123 [2023-04-02 02:11:55,333 INFO L226 Difference]: Without dead ends: 121 [2023-04-02 02:11:55,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-02 02:11:55,334 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:55,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 138 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:11:55,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-02 02:11:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-04-02 02:11:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 78 states have internal predecessors, (88), 35 states have call successors, (35), 11 states have call predecessors, (35), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-04-02 02:11:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 156 transitions. [2023-04-02 02:11:55,370 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 156 transitions. Word has length 52 [2023-04-02 02:11:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:55,370 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 156 transitions. [2023-04-02 02:11:55,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 02:11:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 156 transitions. [2023-04-02 02:11:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 02:11:55,371 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:55,371 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:55,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 02:11:55,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 02:11:55,577 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:55,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:55,577 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2023-04-02 02:11:55,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:55,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067189248] [2023-04-02 02:11:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:55,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:55,599 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:55,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665095004] [2023-04-02 02:11:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:55,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:55,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:55,602 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) [2023-04-02 02:11:55,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 02:11:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:11:55,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 67 conjunts are in the unsatisfiable core [2023-04-02 02:11:55,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 02:11:56,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:11:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-02 02:11:57,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:11:57,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067189248] [2023-04-02 02:11:57,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:11:57,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665095004] [2023-04-02 02:11:57,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665095004] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:11:57,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:11:57,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2023-04-02 02:11:57,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752857604] [2023-04-02 02:11:57,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:11:57,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 02:11:57,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:11:57,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 02:11:57,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2023-04-02 02:11:57,274 INFO L87 Difference]: Start difference. First operand 121 states and 156 transitions. Second operand has 27 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 8 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-04-02 02:12:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:07,637 INFO L93 Difference]: Finished difference Result 341 states and 472 transitions. [2023-04-02 02:12:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-02 02:12:07,638 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 8 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 64 [2023-04-02 02:12:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:07,640 INFO L225 Difference]: With dead ends: 341 [2023-04-02 02:12:07,640 INFO L226 Difference]: Without dead ends: 253 [2023-04-02 02:12:07,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=532, Invalid=2438, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 02:12:07,642 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 164 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:07,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 336 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-02 02:12:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-04-02 02:12:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2023-04-02 02:12:07,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 139 states have internal predecessors, (161), 59 states have call successors, (59), 15 states have call predecessors, (59), 14 states have return successors, (57), 55 states have call predecessors, (57), 57 states have call successors, (57) [2023-04-02 02:12:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 277 transitions. [2023-04-02 02:12:07,736 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 277 transitions. Word has length 64 [2023-04-02 02:12:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:07,736 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 277 transitions. [2023-04-02 02:12:07,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 8 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-04-02 02:12:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 277 transitions. [2023-04-02 02:12:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 02:12:07,737 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:07,737 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:07,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:07,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 02:12:07,943 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:07,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:07,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2023-04-02 02:12:07,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:07,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163603064] [2023-04-02 02:12:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:07,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:07,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:07,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408083553] [2023-04-02 02:12:07,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:07,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:07,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:07,960 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) [2023-04-02 02:12:07,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 02:12:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:08,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-02 02:12:08,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 02:12:08,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-02 02:12:08,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:08,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163603064] [2023-04-02 02:12:08,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:08,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408083553] [2023-04-02 02:12:08,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408083553] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:12:08,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:12:08,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-04-02 02:12:08,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216861255] [2023-04-02 02:12:08,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:08,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 02:12:08,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:08,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 02:12:08,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-04-02 02:12:08,729 INFO L87 Difference]: Start difference. First operand 210 states and 277 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-04-02 02:12:16,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:16,659 INFO L93 Difference]: Finished difference Result 316 states and 426 transitions. [2023-04-02 02:12:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 02:12:16,659 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 72 [2023-04-02 02:12:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:16,661 INFO L225 Difference]: With dead ends: 316 [2023-04-02 02:12:16,661 INFO L226 Difference]: Without dead ends: 261 [2023-04-02 02:12:16,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 02:12:16,662 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 99 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:16,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 351 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 02:12:16,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-04-02 02:12:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 220. [2023-04-02 02:12:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 143 states have (on average 1.1818181818181819) internal successors, (169), 145 states have internal predecessors, (169), 61 states have call successors, (61), 16 states have call predecessors, (61), 15 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2023-04-02 02:12:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 289 transitions. [2023-04-02 02:12:16,754 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 289 transitions. Word has length 72 [2023-04-02 02:12:16,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:16,754 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 289 transitions. [2023-04-02 02:12:16,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-04-02 02:12:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 289 transitions. [2023-04-02 02:12:16,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-02 02:12:16,755 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:16,755 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:16,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:16,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 02:12:16,961 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:16,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 2 times [2023-04-02 02:12:16,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:16,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142381353] [2023-04-02 02:12:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:16,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:16,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:16,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029900198] [2023-04-02 02:12:16,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:12:16,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:16,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:16,973 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) [2023-04-02 02:12:16,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 02:12:17,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:12:17,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:12:17,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 65 conjunts are in the unsatisfiable core [2023-04-02 02:12:17,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 02:12:17,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-02 02:12:18,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:18,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142381353] [2023-04-02 02:12:18,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:18,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029900198] [2023-04-02 02:12:18,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029900198] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:12:18,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:12:18,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2023-04-02 02:12:18,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184457660] [2023-04-02 02:12:18,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:18,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 02:12:18,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:18,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 02:12:18,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-04-02 02:12:18,414 INFO L87 Difference]: Start difference. First operand 220 states and 289 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 24 states have internal predecessors, (60), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2023-04-02 02:12:25,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:12:30,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:12:32,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:12:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:12:37,913 INFO L93 Difference]: Finished difference Result 377 states and 517 transitions. [2023-04-02 02:12:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-02 02:12:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 24 states have internal predecessors, (60), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 77 [2023-04-02 02:12:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:12:37,916 INFO L225 Difference]: With dead ends: 377 [2023-04-02 02:12:37,916 INFO L226 Difference]: Without dead ends: 375 [2023-04-02 02:12:37,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=589, Invalid=2491, Unknown=0, NotChecked=0, Total=3080 [2023-04-02 02:12:37,918 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 260 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 220 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2023-04-02 02:12:37,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 422 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1115 Invalid, 2 Unknown, 0 Unchecked, 13.6s Time] [2023-04-02 02:12:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-04-02 02:12:38,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 325. [2023-04-02 02:12:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 207 states have (on average 1.2077294685990339) internal successors, (250), 209 states have internal predecessors, (250), 97 states have call successors, (97), 21 states have call predecessors, (97), 20 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2023-04-02 02:12:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 442 transitions. [2023-04-02 02:12:38,123 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 442 transitions. Word has length 77 [2023-04-02 02:12:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:12:38,123 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 442 transitions. [2023-04-02 02:12:38,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 24 states have internal predecessors, (60), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2023-04-02 02:12:38,123 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 442 transitions. [2023-04-02 02:12:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-02 02:12:38,124 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:12:38,125 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:12:38,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 02:12:38,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 02:12:38,330 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:12:38,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:12:38,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 1 times [2023-04-02 02:12:38,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:12:38,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993861874] [2023-04-02 02:12:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:38,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:12:38,349 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:12:38,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587732260] [2023-04-02 02:12:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:12:38,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:12:38,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:12:38,355 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) [2023-04-02 02:12:38,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 02:12:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:12:38,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 79 conjunts are in the unsatisfiable core [2023-04-02 02:12:38,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:12:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 22 proven. 22 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-04-02 02:12:39,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-04-02 02:12:41,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:41,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993861874] [2023-04-02 02:12:41,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:41,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587732260] [2023-04-02 02:12:41,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587732260] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:12:41,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:12:41,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2023-04-02 02:12:41,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697589112] [2023-04-02 02:12:41,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:41,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-02 02:12:41,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:41,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-02 02:12:41,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2023-04-02 02:12:41,417 INFO L87 Difference]: Start difference. First operand 325 states and 442 transitions. Second operand has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-02 02:13:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:13:21,334 INFO L93 Difference]: Finished difference Result 510 states and 719 transitions. [2023-04-02 02:13:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-04-02 02:13:21,334 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 91 [2023-04-02 02:13:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:13:21,337 INFO L225 Difference]: With dead ends: 510 [2023-04-02 02:13:21,337 INFO L226 Difference]: Without dead ends: 502 [2023-04-02 02:13:21,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2430 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=1433, Invalid=7309, Unknown=0, NotChecked=0, Total=8742 [2023-04-02 02:13:21,340 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 277 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:13:21,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 559 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1824 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2023-04-02 02:13:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-04-02 02:13:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 447. [2023-04-02 02:13:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 273 states have (on average 1.2271062271062272) internal successors, (335), 275 states have internal predecessors, (335), 149 states have call successors, (149), 25 states have call predecessors, (149), 24 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2023-04-02 02:13:21,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 631 transitions. [2023-04-02 02:13:21,700 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 631 transitions. Word has length 91 [2023-04-02 02:13:21,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:13:21,700 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 631 transitions. [2023-04-02 02:13:21,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-02 02:13:21,701 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 631 transitions. [2023-04-02 02:13:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-02 02:13:21,702 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:13:21,702 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:13:21,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 02:13:21,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:13:21,910 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:13:21,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:13:21,911 INFO L85 PathProgramCache]: Analyzing trace with hash -568526404, now seen corresponding path program 2 times [2023-04-02 02:13:21,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:13:21,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610765482] [2023-04-02 02:13:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:13:21,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:13:21,926 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:13:21,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853282021] [2023-04-02 02:13:21,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:13:21,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:13:21,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:13:21,928 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:13:21,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 02:13:21,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:13:21,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:13:21,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 02:13:21,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:13:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-02 02:13:22,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:13:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-02 02:13:22,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:13:22,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610765482] [2023-04-02 02:13:22,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:13:22,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853282021] [2023-04-02 02:13:22,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853282021] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:13:22,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:13:22,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-04-02 02:13:22,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752718129] [2023-04-02 02:13:22,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:13:22,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 02:13:22,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:13:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 02:13:22,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-04-02 02:13:22,151 INFO L87 Difference]: Start difference. First operand 447 states and 631 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-02 02:13:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:13:23,036 INFO L93 Difference]: Finished difference Result 830 states and 1179 transitions. [2023-04-02 02:13:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 02:13:23,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2023-04-02 02:13:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:13:23,039 INFO L225 Difference]: With dead ends: 830 [2023-04-02 02:13:23,039 INFO L226 Difference]: Without dead ends: 579 [2023-04-02 02:13:23,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 188 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2023-04-02 02:13:23,043 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 81 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 02:13:23,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 329 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 02:13:23,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-04-02 02:13:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 434. [2023-04-02 02:13:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 254 states have (on average 1.2125984251968505) internal successors, (308), 255 states have internal predecessors, (308), 155 states have call successors, (155), 25 states have call predecessors, (155), 24 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2023-04-02 02:13:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 616 transitions. [2023-04-02 02:13:23,411 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 616 transitions. Word has length 99 [2023-04-02 02:13:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:13:23,411 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 616 transitions. [2023-04-02 02:13:23,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-02 02:13:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 616 transitions. [2023-04-02 02:13:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-02 02:13:23,413 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:13:23,413 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:13:23,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-02 02:13:23,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 02:13:23,618 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:13:23,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:13:23,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 2 times [2023-04-02 02:13:23,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:13:23,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148707725] [2023-04-02 02:13:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:13:23,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:13:23,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:13:23,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557319667] [2023-04-02 02:13:23,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:13:23,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:13:23,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:13:23,633 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:13:23,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 02:13:23,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:13:23,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:13:23,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 70 conjunts are in the unsatisfiable core [2023-04-02 02:13:23,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:13:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 59 proven. 34 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-04-02 02:13:24,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:13:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 50 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-04-02 02:13:26,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:13:26,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148707725] [2023-04-02 02:13:26,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:13:26,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557319667] [2023-04-02 02:13:26,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557319667] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:13:26,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:13:26,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-04-02 02:13:26,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71279133] [2023-04-02 02:13:26,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:13:26,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-02 02:13:26,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:13:26,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-02 02:13:26,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-04-02 02:13:26,753 INFO L87 Difference]: Start difference. First operand 434 states and 616 transitions. Second operand has 32 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 10 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 9 states have call predecessors, (30), 8 states have call successors, (30) [2023-04-02 02:14:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:14:33,741 INFO L93 Difference]: Finished difference Result 867 states and 1251 transitions. [2023-04-02 02:14:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-04-02 02:14:33,741 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 10 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 9 states have call predecessors, (30), 8 states have call successors, (30) Word has length 111 [2023-04-02 02:14:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:14:33,744 INFO L225 Difference]: With dead ends: 867 [2023-04-02 02:14:33,745 INFO L226 Difference]: Without dead ends: 688 [2023-04-02 02:14:33,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=1604, Invalid=7138, Unknown=0, NotChecked=0, Total=8742 [2023-04-02 02:14:33,748 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 241 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2023-04-02 02:14:33,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 471 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2023-04-02 02:14:33,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2023-04-02 02:14:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 618. [2023-04-02 02:14:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 358 states have (on average 1.223463687150838) internal successors, (438), 359 states have internal predecessors, (438), 231 states have call successors, (231), 29 states have call predecessors, (231), 28 states have return successors, (229), 229 states have call predecessors, (229), 229 states have call successors, (229) [2023-04-02 02:14:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 898 transitions. [2023-04-02 02:14:34,317 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 898 transitions. Word has length 111 [2023-04-02 02:14:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:14:34,318 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 898 transitions. [2023-04-02 02:14:34,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 10 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 9 states have call predecessors, (30), 8 states have call successors, (30) [2023-04-02 02:14:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 898 transitions. [2023-04-02 02:14:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-02 02:14:34,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:14:34,320 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:14:34,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-02 02:14:34,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 02:14:34,529 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:14:34,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:14:34,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 3 times [2023-04-02 02:14:34,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:14:34,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259046778] [2023-04-02 02:14:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:14:34,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:14:34,537 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:14:34,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520703557] [2023-04-02 02:14:34,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:14:34,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:14:34,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:14:34,538 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:14:34,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-02 02:14:34,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 02:14:34,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:14:34,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 83 conjunts are in the unsatisfiable core [2023-04-02 02:14:34,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:14:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 33 proven. 38 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2023-04-02 02:14:35,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:14:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-02 02:14:39,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:14:39,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259046778] [2023-04-02 02:14:39,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:14:39,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520703557] [2023-04-02 02:14:39,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520703557] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:14:39,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:14:39,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2023-04-02 02:14:39,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182636350] [2023-04-02 02:14:39,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:14:39,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-02 02:14:39,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:14:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-02 02:14:39,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 02:14:39,397 INFO L87 Difference]: Start difference. First operand 618 states and 898 transitions. Second operand has 34 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 9 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) [2023-04-02 02:15:28,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:16:05,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:05,238 INFO L93 Difference]: Finished difference Result 911 states and 1330 transitions. [2023-04-02 02:16:05,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-04-02 02:16:05,239 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 9 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) Word has length 116 [2023-04-02 02:16:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:05,243 INFO L225 Difference]: With dead ends: 911 [2023-04-02 02:16:05,243 INFO L226 Difference]: Without dead ends: 907 [2023-04-02 02:16:05,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 70.7s TimeCoverageRelationStatistics Valid=2769, Invalid=12981, Unknown=0, NotChecked=0, Total=15750 [2023-04-02 02:16:05,248 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 439 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:05,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 652 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 17.4s Time] [2023-04-02 02:16:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2023-04-02 02:16:06,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 752. [2023-04-02 02:16:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 435 states have (on average 1.2275862068965517) internal successors, (534), 436 states have internal predecessors, (534), 283 states have call successors, (283), 34 states have call predecessors, (283), 33 states have return successors, (281), 281 states have call predecessors, (281), 281 states have call successors, (281) [2023-04-02 02:16:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1098 transitions. [2023-04-02 02:16:06,084 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1098 transitions. Word has length 116 [2023-04-02 02:16:06,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:16:06,085 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 1098 transitions. [2023-04-02 02:16:06,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 9 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) [2023-04-02 02:16:06,085 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1098 transitions. [2023-04-02 02:16:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 02:16:06,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:16:06,088 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:16:06,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-02 02:16:06,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 02:16:06,294 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:16:06,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:16:06,295 INFO L85 PathProgramCache]: Analyzing trace with hash 987104335, now seen corresponding path program 1 times [2023-04-02 02:16:06,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:16:06,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546082197] [2023-04-02 02:16:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:06,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:16:06,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:16:06,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258132687] [2023-04-02 02:16:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:16:06,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:16:06,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:16:06,310 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:16:06,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-02 02:16:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:16:06,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 02:16:06,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:16:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 46 proven. 49 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-04-02 02:16:06,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:16:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2023-04-02 02:16:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:16:06,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546082197] [2023-04-02 02:16:06,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:16:06,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258132687] [2023-04-02 02:16:06,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258132687] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:16:06,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:16:06,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2023-04-02 02:16:06,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093040664] [2023-04-02 02:16:06,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:16:06,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 02:16:06,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:16:06,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 02:16:06,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-04-02 02:16:06,971 INFO L87 Difference]: Start difference. First operand 752 states and 1098 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 22 states have internal predecessors, (64), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2023-04-02 02:16:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:16:13,253 INFO L93 Difference]: Finished difference Result 1216 states and 1813 transitions. [2023-04-02 02:16:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-04-02 02:16:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 22 states have internal predecessors, (64), 9 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 129 [2023-04-02 02:16:13,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:16:13,258 INFO L225 Difference]: With dead ends: 1216 [2023-04-02 02:16:13,258 INFO L226 Difference]: Without dead ends: 1214 [2023-04-02 02:16:13,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=919, Invalid=4051, Unknown=0, NotChecked=0, Total=4970 [2023-04-02 02:16:13,261 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 179 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 02:16:13,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 568 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 02:16:13,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states.