/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/cohendiv-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:54:27,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:54:27,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:54:27,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 01:54:27,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 01:54:27,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 01:54:27,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 01:54:27,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 01:54:27,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 01:54:27,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 01:54:27,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 01:54:27,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 01:54:27,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:54:27,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:54:27,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:54:27,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:54:27,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:54:27,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:54:27,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:54:27,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:54:27,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:54:27,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:54:27,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:54:27,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:54:27,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 01:54:27,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 01:54:27,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 01:54:27,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 01:54:27,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 01:54:27,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 01:54:27,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 01:54:27,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 01:54:27,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 01:54:27,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:54:27,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:54:27,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:54:27,768 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 01:54:27,802 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:54:27,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:54:27,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:54:27,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:54:27,804 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:54:27,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:54:27,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:54:27,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:54:27,804 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:54:27,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:54:27,805 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:54:27,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:54:27,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:54:27,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:54:27,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:54:27,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:54:27,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:54:27,806 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:54:27,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:54:27,807 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:54:27,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:54:27,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:54:27,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:54:27,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:54:27,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:54:27,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:54:27,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:54:27,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:54:27,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:54:27,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:54:27,808 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:54:27,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:54:27,809 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:54:27,809 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:54:27,809 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:54:27,809 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:54:28,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:54:28,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:54:28,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:54:28,075 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:54:28,075 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:54:28,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound2.c [2023-04-02 01:54:29,173 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:54:29,354 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:54:29,355 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound2.c [2023-04-02 01:54:29,360 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/829c4552f/759db77c00c944448a4c1ab24caeb959/FLAGb32ebf93b [2023-04-02 01:54:29,375 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/829c4552f/759db77c00c944448a4c1ab24caeb959 [2023-04-02 01:54:29,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:54:29,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:54:29,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:54:29,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:54:29,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:54:29,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:54:29" (1/1) ... [2023-04-02 01:54:29,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bead039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:29, skipping insertion in model container [2023-04-02 01:54:29,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:54:29" (1/1) ... [2023-04-02 01:54:29,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:54:29,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:54:29,528 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/cohendiv-ll_unwindbound2.c[576,589] [2023-04-02 01:54:29,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:54:29,552 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:54:29,560 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/cohendiv-ll_unwindbound2.c[576,589] [2023-04-02 01:54:29,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:54:29,577 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:54:29,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:29 WrapperNode [2023-04-02 01:54:29,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:54:29,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:54:29,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:54:29,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:54:29,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:29" (1/1) ... [2023-04-02 01:54:29,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:29" (1/1) ... [2023-04-02 01:54:29,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:29" (1/1) ... [2023-04-02 01:54:29,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:29" (1/1) ... [2023-04-02 01:54:29,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:29" (1/1) ... [2023-04-02 01:54:29,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:29" (1/1) ... [2023-04-02 01:54:29,622 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:29" (1/1) ... [2023-04-02 01:54:29,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:29" (1/1) ... [2023-04-02 01:54:29,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:54:29,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:54:29,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:54:29,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:54:29,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:29" (1/1) ... [2023-04-02 01:54:29,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:54:29,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:54:29,654 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 01:54:29,676 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 01:54:29,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:54:29,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:54:29,694 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:54:29,694 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 01:54:29,694 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:54:29,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:54:29,694 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:54:29,694 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:54:29,694 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:54:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:54:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 01:54:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 01:54:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:54:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:54:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:54:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:54:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:54:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:54:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:54:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:54:29,761 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:54:29,762 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:54:29,935 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:54:29,940 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:54:29,940 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 01:54:29,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:54:29 BoogieIcfgContainer [2023-04-02 01:54:29,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:54:29,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:54:29,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:54:29,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:54:29,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:54:29" (1/3) ... [2023-04-02 01:54:29,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a116b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:54:29, skipping insertion in model container [2023-04-02 01:54:29,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:29" (2/3) ... [2023-04-02 01:54:29,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a116b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:54:29, skipping insertion in model container [2023-04-02 01:54:29,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:54:29" (3/3) ... [2023-04-02 01:54:29,948 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound2.c [2023-04-02 01:54:29,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:54:29,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:54:29,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:54:30,004 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;@c99ba3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:54:30,004 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:54:30,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 01:54:30,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 01:54:30,024 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:54:30,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:54:30,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:54:30,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:54:30,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1588022502, now seen corresponding path program 1 times [2023-04-02 01:54:30,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:54:30,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858523046] [2023-04-02 01:54:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:30,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:54:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:54:30,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:54:30,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858523046] [2023-04-02 01:54:30,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 01:54:30,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184055338] [2023-04-02 01:54:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:30,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:54:30,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:54:30,181 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 01:54:30,182 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 01:54:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:54:30,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 01:54:30,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:54:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:54:30,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:54:30,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184055338] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:54:30,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:54:30,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 01:54:30,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868757967] [2023-04-02 01:54:30,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:54:30,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 01:54:30,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:54:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 01:54:30,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 01:54:30,351 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:54:30,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:54:30,374 INFO L93 Difference]: Finished difference Result 67 states and 99 transitions. [2023-04-02 01:54:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 01:54:30,375 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-04-02 01:54:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:54:30,381 INFO L225 Difference]: With dead ends: 67 [2023-04-02 01:54:30,381 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 01:54:30,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 01:54:30,386 INFO L413 NwaCegarLoop]: 47 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, 47 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 01:54:30,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:54:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 01:54:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-02 01:54:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 01:54:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-04-02 01:54:30,433 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2023-04-02 01:54:30,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:54:30,433 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-04-02 01:54:30,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:54:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-04-02 01:54:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 01:54:30,434 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:54:30,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:54:30,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 01:54:30,640 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 01:54:30,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:54:30,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:54:30,641 INFO L85 PathProgramCache]: Analyzing trace with hash 766070672, now seen corresponding path program 1 times [2023-04-02 01:54:30,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:54:30,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920177654] [2023-04-02 01:54:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:30,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:54:30,667 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:54:30,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475831832] [2023-04-02 01:54:30,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:30,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:54:30,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:54:30,673 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 01:54:30,700 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 01:54:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:54:30,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:54:30,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:54:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:54:30,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:54:30,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:54:30,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920177654] [2023-04-02 01:54:30,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:54:30,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475831832] [2023-04-02 01:54:30,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475831832] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:54:30,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:54:30,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:54:30,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807128040] [2023-04-02 01:54:30,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:54:30,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:54:30,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:54:30,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:54:30,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:54:30,811 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:54:30,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:54:30,826 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-04-02 01:54:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:54:30,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-04-02 01:54:30,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:54:30,828 INFO L225 Difference]: With dead ends: 42 [2023-04-02 01:54:30,828 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 01:54:30,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:54:30,829 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:54:30,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:54:30,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 01:54:30,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-02 01:54:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 01:54:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2023-04-02 01:54:30,836 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2023-04-02 01:54:30,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:54:30,837 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2023-04-02 01:54:30,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:54:30,837 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2023-04-02 01:54:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 01:54:30,837 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:54:30,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:54:30,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 01:54:31,049 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 01:54:31,049 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:54:31,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:54:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash 767560222, now seen corresponding path program 1 times [2023-04-02 01:54:31,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:54:31,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369678792] [2023-04-02 01:54:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:31,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:54:31,065 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:54:31,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482432622] [2023-04-02 01:54:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:31,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:54:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:54:31,074 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 01:54:31,075 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 01:54:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:54:31,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 01:54:31,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:54:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:54:31,266 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:54:31,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:54:31,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369678792] [2023-04-02 01:54:31,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:54:31,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482432622] [2023-04-02 01:54:31,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482432622] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:54:31,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:54:31,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 01:54:31,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957828046] [2023-04-02 01:54:31,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:54:31,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:54:31,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:54:31,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:54:31,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:54:31,269 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:54:31,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:54:31,386 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2023-04-02 01:54:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 01:54:31,387 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-02 01:54:31,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:54:31,388 INFO L225 Difference]: With dead ends: 45 [2023-04-02 01:54:31,388 INFO L226 Difference]: Without dead ends: 43 [2023-04-02 01:54:31,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-02 01:54:31,390 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:54:31,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 172 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:54:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-02 01:54:31,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2023-04-02 01:54:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 01:54:31,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2023-04-02 01:54:31,400 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2023-04-02 01:54:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:54:31,400 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2023-04-02 01:54:31,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:54:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2023-04-02 01:54:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 01:54:31,401 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:54:31,401 INFO L195 NwaCegarLoop]: trace histogram [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 01:54:31,411 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 01:54:31,607 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 01:54:31,607 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:54:31,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:54:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1016228092, now seen corresponding path program 1 times [2023-04-02 01:54:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:54:31,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733345192] [2023-04-02 01:54:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:54:31,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:54:31,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134562065] [2023-04-02 01:54:31,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:31,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:54:31,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:54:31,637 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 01:54:31,640 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 01:54:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:54:31,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 01:54:31,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:54:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:54:31,845 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:54:31,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:54:31,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733345192] [2023-04-02 01:54:31,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:54:31,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134562065] [2023-04-02 01:54:31,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134562065] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:54:31,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:54:31,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 01:54:31,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884497554] [2023-04-02 01:54:31,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:54:31,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 01:54:31,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:54:31,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 01:54:31,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:54:31,849 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:54:31,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:54:31,976 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2023-04-02 01:54:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 01:54:31,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-04-02 01:54:31,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:54:31,980 INFO L225 Difference]: With dead ends: 58 [2023-04-02 01:54:31,980 INFO L226 Difference]: Without dead ends: 55 [2023-04-02 01:54:31,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-02 01:54:31,985 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:54:31,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 161 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:54:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-02 01:54:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2023-04-02 01:54:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 01:54:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2023-04-02 01:54:32,004 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2023-04-02 01:54:32,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:54:32,005 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2023-04-02 01:54:32,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:54:32,005 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2023-04-02 01:54:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 01:54:32,006 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:54:32,006 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 01:54:32,018 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 01:54:32,212 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 01:54:32,212 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:54:32,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:54:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2019703110, now seen corresponding path program 1 times [2023-04-02 01:54:32,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:54:32,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417095631] [2023-04-02 01:54:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:54:32,228 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:54:32,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126427141] [2023-04-02 01:54:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:32,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:54:32,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:54:32,230 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 01:54:32,245 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 01:54:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:54:32,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 01:54:32,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:54:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:54:32,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:54:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:54:32,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:54:32,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417095631] [2023-04-02 01:54:32,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:54:32,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126427141] [2023-04-02 01:54:32,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126427141] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 01:54:32,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 01:54:32,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-04-02 01:54:32,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465646118] [2023-04-02 01:54:32,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:54:32,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 01:54:32,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:54:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 01:54:32,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:54:32,432 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:54:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:54:32,512 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2023-04-02 01:54:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:54:32,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-04-02 01:54:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:54:32,517 INFO L225 Difference]: With dead ends: 60 [2023-04-02 01:54:32,518 INFO L226 Difference]: Without dead ends: 58 [2023-04-02 01:54:32,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-02 01:54:32,520 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:54:32,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 95 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:54:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-02 01:54:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-04-02 01:54:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 01:54:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2023-04-02 01:54:32,535 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 31 [2023-04-02 01:54:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:54:32,536 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2023-04-02 01:54:32,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 01:54:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2023-04-02 01:54:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 01:54:32,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:54:32,537 INFO L195 NwaCegarLoop]: trace histogram [3, 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 01:54:32,551 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 01:54:32,745 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 01:54:32,745 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:54:32,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:54:32,746 INFO L85 PathProgramCache]: Analyzing trace with hash 202176206, now seen corresponding path program 1 times [2023-04-02 01:54:32,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:54:32,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889790093] [2023-04-02 01:54:32,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:32,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:54:32,772 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:54:32,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908255640] [2023-04-02 01:54:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:32,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:54:32,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:54:32,777 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 01:54:32,779 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 01:54:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:54:32,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 01:54:32,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:54:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:54:32,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:54:32,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:54:32,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889790093] [2023-04-02 01:54:32,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:54:32,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908255640] [2023-04-02 01:54:32,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908255640] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:54:32,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:54:32,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 01:54:32,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426384762] [2023-04-02 01:54:32,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:54:32,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 01:54:32,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:54:32,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 01:54:32,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:54:32,889 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 01:54:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:54:32,926 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2023-04-02 01:54:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 01:54:32,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2023-04-02 01:54:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:54:32,929 INFO L225 Difference]: With dead ends: 89 [2023-04-02 01:54:32,929 INFO L226 Difference]: Without dead ends: 64 [2023-04-02 01:54:32,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:54:32,932 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:54:32,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:54:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-02 01:54:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-04-02 01:54:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 01:54:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2023-04-02 01:54:32,944 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 34 [2023-04-02 01:54:32,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:54:32,945 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2023-04-02 01:54:32,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 01:54:32,945 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2023-04-02 01:54:32,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 01:54:32,946 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:54:32,946 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:54:32,956 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 01:54:33,154 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 01:54:33,154 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:54:33,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:54:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1813008070, now seen corresponding path program 1 times [2023-04-02 01:54:33,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:54:33,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127790010] [2023-04-02 01:54:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:33,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:54:33,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:54:33,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168626369] [2023-04-02 01:54:33,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:33,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:54:33,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:54:33,176 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 01:54:33,189 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 01:54:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:54:33,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 01:54:33,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:54:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 01:54:33,308 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:54:33,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:54:33,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127790010] [2023-04-02 01:54:33,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:54:33,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168626369] [2023-04-02 01:54:33,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168626369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:54:33,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:54:33,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 01:54:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442060080] [2023-04-02 01:54:33,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:54:33,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:54:33,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:54:33,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:54:33,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:54:33,312 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 01:54:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:54:33,401 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2023-04-02 01:54:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 01:54:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2023-04-02 01:54:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:54:33,403 INFO L225 Difference]: With dead ends: 70 [2023-04-02 01:54:33,404 INFO L226 Difference]: Without dead ends: 68 [2023-04-02 01:54:33,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-02 01:54:33,405 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:54:33,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 167 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:54:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-02 01:54:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-04-02 01:54:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 01:54:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2023-04-02 01:54:33,425 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 41 [2023-04-02 01:54:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:54:33,425 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2023-04-02 01:54:33,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 01:54:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2023-04-02 01:54:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 01:54:33,432 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:54:33,432 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 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 01:54:33,439 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 01:54:33,634 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 01:54:33,634 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:54:33,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:54:33,635 INFO L85 PathProgramCache]: Analyzing trace with hash -683043127, now seen corresponding path program 1 times [2023-04-02 01:54:33,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:54:33,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73723208] [2023-04-02 01:54:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:33,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:54:33,644 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:54:33,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359968232] [2023-04-02 01:54:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:33,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:54:33,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:54:33,646 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 01:54:33,648 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 01:54:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:54:33,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 01:54:33,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:54:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:54:33,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:54:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 01:54:33,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:54:33,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73723208] [2023-04-02 01:54:33,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:54:33,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359968232] [2023-04-02 01:54:33,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359968232] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:54:33,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:54:33,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-04-02 01:54:33,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243192847] [2023-04-02 01:54:33,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:54:33,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 01:54:33,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:54:33,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 01:54:33,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:54:33,970 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 14 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-02 01:54:34,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:54:34,264 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2023-04-02 01:54:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 01:54:34,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 47 [2023-04-02 01:54:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:54:34,267 INFO L225 Difference]: With dead ends: 87 [2023-04-02 01:54:34,267 INFO L226 Difference]: Without dead ends: 85 [2023-04-02 01:54:34,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-02 01:54:34,268 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:54:34,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 165 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:54:34,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-04-02 01:54:34,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2023-04-02 01:54:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 01:54:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2023-04-02 01:54:34,281 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 47 [2023-04-02 01:54:34,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:54:34,281 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2023-04-02 01:54:34,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-02 01:54:34,281 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2023-04-02 01:54:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 01:54:34,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:54:34,282 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2023-04-02 01:54:34,292 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 01:54:34,492 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 01:54:34,492 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:54:34,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:54:34,493 INFO L85 PathProgramCache]: Analyzing trace with hash -589126939, now seen corresponding path program 1 times [2023-04-02 01:54:34,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:54:34,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626911841] [2023-04-02 01:54:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:34,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:54:34,506 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:54:34,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066788979] [2023-04-02 01:54:34,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:54:34,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:54:34,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:54:34,507 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 01:54:34,510 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 01:54:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:54:34,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-02 01:54:34,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:54:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 01:54:34,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:54:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 01:54:35,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:54:35,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626911841] [2023-04-02 01:54:35,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:54:35,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066788979] [2023-04-02 01:54:35,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066788979] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:54:35,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:54:35,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2023-04-02 01:54:35,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252069789] [2023-04-02 01:54:35,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:54:35,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 01:54:35,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:54:35,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 01:54:35,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-04-02 01:54:35,141 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-02 01:54:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:54:35,550 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2023-04-02 01:54:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 01:54:35,550 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 50 [2023-04-02 01:54:35,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:54:35,550 INFO L225 Difference]: With dead ends: 121 [2023-04-02 01:54:35,551 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 01:54:35,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2023-04-02 01:54:35,552 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 100 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:54:35,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 170 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:54:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 01:54:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 01:54:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-02 01:54:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 01:54:35,553 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2023-04-02 01:54:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:54:35,553 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 01:54:35,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-02 01:54:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 01:54:35,554 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 01:54:35,556 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 01:54:35,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-02 01:54:35,763 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 01:54:35,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 01:54:37,071 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2023-04-02 01:54:37,071 INFO L899 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2023-04-02 01:54:37,071 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 8) no Hoare annotation was computed. [2023-04-02 01:54:37,071 INFO L899 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2023-04-02 01:54:37,071 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2023-04-02 01:54:37,071 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 13) the Hoare annotation is: true [2023-04-02 01:54:37,071 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2023-04-02 01:54:37,072 INFO L895 garLoopResultBuilder]: At program point L37-4(lines 37 61) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 2147483647)) (.cse2 (<= 1 main_~y~0))) (or (let ((.cse1 (* main_~a~0 main_~y~0))) (and .cse0 (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse1) (+ main_~b~0 main_~x~0)) .cse2 (= main_~b~0 .cse1))) (< 0 |old(~counter~0)|) (and (= main_~x~0 main_~r~0) .cse0 (= main_~q~0 0) .cse2))) [2023-04-02 01:54:37,072 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 23 65) no Hoare annotation was computed. [2023-04-02 01:54:37,072 INFO L895 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (or (< 0 |old(~counter~0)|) (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 2147483647) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0)))) [2023-04-02 01:54:37,072 INFO L899 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2023-04-02 01:54:37,072 INFO L895 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 2147483647) (<= 1 main_~r~0) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (< 0 |old(~counter~0)|)) [2023-04-02 01:54:37,072 INFO L899 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2023-04-02 01:54:37,072 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 23 65) no Hoare annotation was computed. [2023-04-02 01:54:37,073 INFO L895 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 2147483647) (<= 1 main_~r~0) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (< 0 |old(~counter~0)|)) [2023-04-02 01:54:37,073 INFO L899 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2023-04-02 01:54:37,073 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 23 65) the Hoare annotation is: (or (<= ~counter~0 0) (< 0 |old(~counter~0)|)) [2023-04-02 01:54:37,073 INFO L895 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 2147483647) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (< 0 |old(~counter~0)|)) [2023-04-02 01:54:37,073 INFO L895 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 2147483647) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (< 0 |old(~counter~0)|)) [2023-04-02 01:54:37,073 INFO L899 garLoopResultBuilder]: For program point L63(line 63) no Hoare annotation was computed. [2023-04-02 01:54:37,073 INFO L895 garLoopResultBuilder]: At program point L30(line 30) the Hoare annotation is: (or (and (<= main_~y~0 2147483647) (<= ~counter~0 0)) (< 0 |old(~counter~0)|)) [2023-04-02 01:54:37,073 INFO L899 garLoopResultBuilder]: For program point L30-1(line 30) no Hoare annotation was computed. [2023-04-02 01:54:37,074 INFO L899 garLoopResultBuilder]: For program point L49(lines 46 58) no Hoare annotation was computed. [2023-04-02 01:54:37,074 INFO L895 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 2147483647) (<= 1 main_~r~0) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (< 0 |old(~counter~0)|)) [2023-04-02 01:54:37,074 INFO L895 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 2147483647) (<= 1 main_~r~0) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (< 0 |old(~counter~0)|)) [2023-04-02 01:54:37,074 INFO L899 garLoopResultBuilder]: For program point L39(lines 37 61) no Hoare annotation was computed. [2023-04-02 01:54:37,074 INFO L899 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2023-04-02 01:54:37,074 INFO L895 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 2147483647) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (< 0 |old(~counter~0)|)) [2023-04-02 01:54:37,074 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2023-04-02 01:54:37,074 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 01:54:37,074 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 01:54:37,075 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 01:54:37,075 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2023-04-02 01:54:37,075 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 01:54:37,075 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 01:54:37,075 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2023-04-02 01:54:37,075 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2023-04-02 01:54:37,075 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2023-04-02 01:54:37,075 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2023-04-02 01:54:37,075 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2023-04-02 01:54:37,075 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-04-02 01:54:37,078 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:54:37,079 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 01:54:37,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 01:54:37 BoogieIcfgContainer [2023-04-02 01:54:37,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 01:54:37,094 INFO L158 Benchmark]: Toolchain (without parser) took 7715.66ms. Allocated memory is still 189.8MB. Free memory was 150.6MB in the beginning and 139.4MB in the end (delta: 11.2MB). Peak memory consumption was 96.6MB. Max. memory is 8.0GB. [2023-04-02 01:54:37,094 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 189.8MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 01:54:37,095 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.67ms. Allocated memory is still 189.8MB. Free memory was 150.3MB in the beginning and 139.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 01:54:37,095 INFO L158 Benchmark]: Boogie Preprocessor took 45.75ms. Allocated memory is still 189.8MB. Free memory was 139.8MB in the beginning and 138.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 01:54:37,095 INFO L158 Benchmark]: RCFGBuilder took 316.88ms. Allocated memory is still 189.8MB. Free memory was 138.1MB in the beginning and 126.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 01:54:37,096 INFO L158 Benchmark]: TraceAbstraction took 7150.07ms. Allocated memory is still 189.8MB. Free memory was 125.9MB in the beginning and 139.4MB in the end (delta: -13.5MB). Peak memory consumption was 71.5MB. Max. memory is 8.0GB. [2023-04-02 01:54:37,097 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 189.8MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 198.67ms. Allocated memory is still 189.8MB. Free memory was 150.3MB in the beginning and 139.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.75ms. Allocated memory is still 189.8MB. Free memory was 139.8MB in the beginning and 138.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 316.88ms. Allocated memory is still 189.8MB. Free memory was 138.1MB in the beginning and 126.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 7150.07ms. Allocated memory is still 189.8MB. Free memory was 125.9MB in the beginning and 139.4MB in the end (delta: -13.5MB). Peak memory consumption was 71.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.1s, OverallIterations: 9, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 271 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 241 mSDsluCounter, 1213 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 891 mSDsCounter, 124 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 837 IncrementalHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 124 mSolverCounterUnsat, 322 mSDtfsCounter, 837 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 415 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=8, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 17 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 16 LocationsWithAnnotation, 58 PreInvPairs, 85 NumberOfFragments, 312 HoareAnnotationTreeSize, 58 FomulaSimplifications, 514 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 16 FomulaSimplificationsInter, 618 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 296 NumberOfCodeBlocks, 296 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 395 ConstructedInterpolants, 0 QuantifiedInterpolants, 1266 SizeOfPredicates, 25 NumberOfNonLiveVariables, 993 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 12 InterpolantComputations, 7 PerfectInterpolantSequences, 237/264 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: ((((y <= 2147483647 && 1 <= r) && q * y + r + a * y == b + x) && 1 <= y) && b == a * y) || 0 < \old(counter) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((y <= 2147483647 && q * y + r + a * y == b + x) && 1 <= y) && b == a * y) || 0 < \old(counter) RESULT: Ultimate proved your program to be correct! [2023-04-02 01:54:37,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...