./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a4c57e3 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-4a4c57e-m [2024-09-08 20:12:25,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-08 20:12:25,979 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2024-09-08 20:12:25,984 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-08 20:12:25,985 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-08 20:12:26,013 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-08 20:12:26,014 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-08 20:12:26,015 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-08 20:12:26,016 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-08 20:12:26,019 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-08 20:12:26,019 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-08 20:12:26,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-08 20:12:26,020 INFO L153 SettingsManager]: * Use SBE=true [2024-09-08 20:12:26,020 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-08 20:12:26,020 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-08 20:12:26,021 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-08 20:12:26,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-08 20:12:26,021 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-08 20:12:26,021 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-08 20:12:26,021 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-08 20:12:26,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-08 20:12:26,024 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-08 20:12:26,024 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-08 20:12:26,024 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-08 20:12:26,024 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-08 20:12:26,024 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-08 20:12:26,025 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-08 20:12:26,025 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-08 20:12:26,025 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-08 20:12:26,025 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-08 20:12:26,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-09-08 20:12:26,026 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-08 20:12:26,026 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-08 20:12:26,026 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-08 20:12:26,027 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-08 20:12:26,027 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2024-09-08 20:12:26,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-08 20:12:26,028 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-08 20:12:26,028 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2024-09-08 20:12:26,029 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2024-09-08 20:12:26,030 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2024-09-08 20:12:26,030 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/UGemCutter-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c [2024-09-08 20:12:26,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-08 20:12:26,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-08 20:12:26,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-08 20:12:26,344 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-08 20:12:26,344 INFO L274 PluginConnector]: CDTParser initialized [2024-09-08 20:12:26,345 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c [2024-09-08 20:12:27,757 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-08 20:12:27,936 INFO L384 CDTParser]: Found 1 translation units. [2024-09-08 20:12:27,937 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c [2024-09-08 20:12:27,943 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/c307872d4/e4e036d2dea1410ebc639c3b1fdbf614/FLAGe778e9492 [2024-09-08 20:12:27,956 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/c307872d4/e4e036d2dea1410ebc639c3b1fdbf614 [2024-09-08 20:12:27,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-08 20:12:27,960 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-08 20:12:27,961 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-08 20:12:27,962 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-08 20:12:27,967 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-08 20:12:27,968 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 08:12:27" (1/1) ... [2024-09-08 20:12:27,970 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c21787d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:27, skipping insertion in model container [2024-09-08 20:12:27,971 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 08:12:27" (1/1) ... [2024-09-08 20:12:27,994 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-08 20:12:28,188 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c[2155,2168] [2024-09-08 20:12:28,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-08 20:12:28,206 INFO L200 MainTranslator]: Completed pre-run [2024-09-08 20:12:28,229 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c[2155,2168] [2024-09-08 20:12:28,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-08 20:12:28,252 INFO L204 MainTranslator]: Completed translation [2024-09-08 20:12:28,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28 WrapperNode [2024-09-08 20:12:28,253 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-08 20:12:28,256 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-08 20:12:28,257 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-08 20:12:28,257 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-08 20:12:28,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28" (1/1) ... [2024-09-08 20:12:28,269 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28" (1/1) ... [2024-09-08 20:12:28,283 INFO L138 Inliner]: procedures = 21, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2024-09-08 20:12:28,284 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-08 20:12:28,285 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-08 20:12:28,285 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-08 20:12:28,285 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-08 20:12:28,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28" (1/1) ... [2024-09-08 20:12:28,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28" (1/1) ... [2024-09-08 20:12:28,294 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28" (1/1) ... [2024-09-08 20:12:28,294 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28" (1/1) ... [2024-09-08 20:12:28,298 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28" (1/1) ... [2024-09-08 20:12:28,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28" (1/1) ... [2024-09-08 20:12:28,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28" (1/1) ... [2024-09-08 20:12:28,305 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28" (1/1) ... [2024-09-08 20:12:28,307 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-08 20:12:28,308 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-08 20:12:28,311 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-08 20:12:28,311 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-08 20:12:28,312 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28" (1/1) ... [2024-09-08 20:12:28,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-09-08 20:12:28,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-09-08 20:12:28,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-09-08 20:12:28,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-09-08 20:12:28,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-08 20:12:28,411 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-09-08 20:12:28,411 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-09-08 20:12:28,411 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-09-08 20:12:28,411 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-09-08 20:12:28,411 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-09-08 20:12:28,412 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-09-08 20:12:28,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-08 20:12:28,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-08 20:12:28,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-08 20:12:28,413 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-09-08 20:12:28,525 INFO L242 CfgBuilder]: Building ICFG [2024-09-08 20:12:28,528 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-08 20:12:28,745 INFO L287 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-09-08 20:12:28,745 INFO L291 CfgBuilder]: Performing block encoding [2024-09-08 20:12:28,893 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-08 20:12:28,893 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-08 20:12:28,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 08:12:28 BoogieIcfgContainer [2024-09-08 20:12:28,894 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-08 20:12:28,895 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-08 20:12:28,895 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-08 20:12:28,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-08 20:12:28,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 08:12:27" (1/3) ... [2024-09-08 20:12:28,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f9412e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 08:12:28, skipping insertion in model container [2024-09-08 20:12:28,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:12:28" (2/3) ... [2024-09-08 20:12:28,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f9412e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 08:12:28, skipping insertion in model container [2024-09-08 20:12:28,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 08:12:28" (3/3) ... [2024-09-08 20:12:28,903 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2024-09-08 20:12:28,918 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-08 20:12:28,918 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-08 20:12:28,919 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-09-08 20:12:28,964 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-09-08 20:12:29,003 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-08 20:12:29,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2024-09-08 20:12:29,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-09-08 20:12:29,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2024-09-08 20:12:29,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2024-09-08 20:12:29,041 INFO L157 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2024-09-08 20:12:29,051 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2024-09-08 20:12:29,057 INFO L336 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, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@400a81e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-08 20:12:29,057 INFO L337 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-09-08 20:12:29,171 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-09-08 20:12:29,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-08 20:12:29,177 INFO L85 PathProgramCache]: Analyzing trace with hash 465831969, now seen corresponding path program 1 times [2024-09-08 20:12:29,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-08 20:12:29,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182351090] [2024-09-08 20:12:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-08 20:12:29,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-08 20:12:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-08 20:12:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-08 20:12:30,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-08 20:12:30,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182351090] [2024-09-08 20:12:30,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182351090] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-08 20:12:30,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801541533] [2024-09-08 20:12:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-08 20:12:30,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-08 20:12:30,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-09-08 20:12:30,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-08 20:12:30,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-08 20:12:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-08 20:12:30,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-08 20:12:30,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-08 20:12:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-08 20:12:30,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-08 20:12:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-08 20:12:31,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801541533] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-08 20:12:31,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-08 20:12:31,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-09-08 20:12:31,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282326868] [2024-09-08 20:12:31,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-08 20:12:31,429 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-08 20:12:31,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-08 20:12:31,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-08 20:12:31,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-09-08 20:12:31,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-08 20:12:31,465 INFO L474 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-09-08 20:12:31,466 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 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) [2024-09-08 20:12:31,466 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-09-08 20:12:34,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-08 20:12:34,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-08 20:12:34,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-08 20:12:34,730 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-09-08 20:12:34,731 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-09-08 20:12:34,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-08 20:12:34,732 INFO L85 PathProgramCache]: Analyzing trace with hash 571738369, now seen corresponding path program 1 times [2024-09-08 20:12:34,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-08 20:12:34,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253067391] [2024-09-08 20:12:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-08 20:12:34,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-08 20:12:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-08 20:12:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-08 20:12:35,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-08 20:12:35,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253067391] [2024-09-08 20:12:35,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253067391] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-08 20:12:35,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027360791] [2024-09-08 20:12:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-08 20:12:35,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-08 20:12:35,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-09-08 20:12:35,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-08 20:12:35,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-08 20:12:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-08 20:12:36,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-08 20:12:36,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-08 20:12:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-08 20:12:38,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-08 20:12:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-08 20:12:45,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027360791] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-08 20:12:45,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-08 20:12:45,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2024-09-08 20:12:45,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584676595] [2024-09-08 20:12:45,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-08 20:12:45,383 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-08 20:12:45,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-08 20:12:45,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-08 20:12:45,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1102, Unknown=2, NotChecked=0, Total=1332 [2024-09-08 20:12:45,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-08 20:12:45,387 INFO L474 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-09-08 20:12:45,387 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 37 states have internal predecessors, (55), 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) [2024-09-08 20:12:45,387 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 22 states. [2024-09-08 20:12:45,387 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-09-08 20:13:10,806 WARN L293 SmtUtils]: Spent 20.41s on a formula simplification. DAG size of input: 121 DAG size of output: 79 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-08 20:15:01,913 WARN L293 SmtUtils]: Spent 1.79m on a formula simplification. DAG size of input: 120 DAG size of output: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-08 20:16:11,813 WARN L293 SmtUtils]: Spent 1.06m on a formula simplification. DAG size of input: 104 DAG size of output: 103 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-08 20:16:22,185 WARN L293 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 131 DAG size of output: 132 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-08 20:16:49,113 WARN L293 SmtUtils]: Spent 23.68s on a formula simplification. DAG size of input: 142 DAG size of output: 137 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-08 20:17:05,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-08 20:17:12,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-08 20:17:15,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-08 20:17:17,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-08 20:17:22,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-08 20:17:24,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-08 20:17:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-08 20:17:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-08 20:17:24,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-08 20:17:24,939 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,4 /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-08 20:17:24,940 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-09-08 20:17:24,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-08 20:17:24,940 INFO L85 PathProgramCache]: Analyzing trace with hash 919442113, now seen corresponding path program 2 times [2024-09-08 20:17:24,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-08 20:17:24,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620996347] [2024-09-08 20:17:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-08 20:17:24,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-08 20:17:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-08 20:17:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-08 20:17:26,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-08 20:17:26,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620996347] [2024-09-08 20:17:26,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620996347] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-08 20:17:26,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723376180] [2024-09-08 20:17:26,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-08 20:17:26,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-08 20:17:26,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2024-09-08 20:17:26,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-08 20:17:26,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-08 20:17:27,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-08 20:17:27,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-08 20:17:27,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-08 20:17:27,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-08 20:17:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-08 20:17:30,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-08 20:18:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 82 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-08 20:18:47,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723376180] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-08 20:18:47,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-08 20:18:47,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 67 [2024-09-08 20:18:47,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786928531] [2024-09-08 20:18:47,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-08 20:18:47,552 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-08 20:18:47,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-08 20:18:47,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-08 20:18:47,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=832, Invalid=3570, Unknown=20, NotChecked=0, Total=4422 [2024-09-08 20:18:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-08 20:18:47,556 INFO L474 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2024-09-08 20:18:47,557 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 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) [2024-09-08 20:18:47,557 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 22 states. [2024-09-08 20:18:47,557 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 48 states. [2024-09-08 20:18:47,557 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2024-09-08 20:19:25,726 WARN L293 SmtUtils]: Spent 32.57s on a formula simplification. DAG size of input: 118 DAG size of output: 91 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15