./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 01849734 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../sv-benchmarks/c/weaver/popl20-mult-4.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 b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-0184973-m [2025-04-24 17:37:58,747 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-24 17:37:58,828 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2025-04-24 17:37:58,834 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-24 17:37:58,835 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-24 17:37:58,853 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-24 17:37:58,854 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-24 17:37:58,854 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-24 17:37:58,854 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-24 17:37:58,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-24 17:37:58,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-24 17:37:58,855 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-24 17:37:58,855 INFO L153 SettingsManager]: * Use SBE=true [2025-04-24 17:37:58,855 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-24 17:37:58,855 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-24 17:37:58,855 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-24 17:37:58,855 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-24 17:37:58,855 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-24 17:37:58,855 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-24 17:37:58,856 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-24 17:37:58,856 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-24 17:37:58,856 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-24 17:37:58,856 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-24 17:37:58,856 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-24 17:37:58,856 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-24 17:37:58,856 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-24 17:37:58,856 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-24 17:37:58,856 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-24 17:37:58,856 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-24 17:37:58,856 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-24 17:37:58,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-24 17:37:58,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-24 17:37:58,857 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-24 17:37:58,857 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-24 17:37:58,857 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-24 17:37:58,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-24 17:37:58,857 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-24 17:37:58,857 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-24 17:37:58,857 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-24 17:37:58,857 INFO L153 SettingsManager]: * Commutativity condition synthesis=NECESSARY_AND_SUFFICIENT [2025-04-24 17:37:58,858 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-24 17:37:58,858 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-24 17:37:58,858 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2025-04-24 17:37:58,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-24 17:37:58,858 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2025-04-24 17:37:58,858 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2025-04-24 17:37:58,858 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2025-04-24 17:37:58,858 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 [2025-04-24 17:37:59,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-24 17:37:59,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-24 17:37:59,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-24 17:37:59,102 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-24 17:37:59,102 INFO L274 PluginConnector]: CDTParser initialized [2025-04-24 17:37:59,103 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2025-04-24 17:38:00,415 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/7b74706c8/84786d4b4f4b478395d4987677250e88/FLAG50aa93df0 [2025-04-24 17:38:00,588 INFO L389 CDTParser]: Found 1 translation units. [2025-04-24 17:38:00,590 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2025-04-24 17:38:00,595 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/7b74706c8/84786d4b4f4b478395d4987677250e88/FLAG50aa93df0 [2025-04-24 17:38:01,415 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/7b74706c8/84786d4b4f4b478395d4987677250e88 [2025-04-24 17:38:01,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-24 17:38:01,419 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-24 17:38:01,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-24 17:38:01,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-24 17:38:01,424 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-24 17:38:01,424 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,425 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43794a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01, skipping insertion in model container [2025-04-24 17:38:01,425 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,438 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-24 17:38:01,592 WARN L116 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2664,2677] [2025-04-24 17:38:01,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-24 17:38:01,605 INFO L200 MainTranslator]: Completed pre-run [2025-04-24 17:38:01,639 WARN L116 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2664,2677] [2025-04-24 17:38:01,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-24 17:38:01,651 INFO L204 MainTranslator]: Completed translation [2025-04-24 17:38:01,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01 WrapperNode [2025-04-24 17:38:01,652 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-24 17:38:01,652 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-24 17:38:01,653 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-24 17:38:01,653 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-24 17:38:01,657 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,664 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,682 INFO L138 Inliner]: procedures = 22, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 92 [2025-04-24 17:38:01,684 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-24 17:38:01,684 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-24 17:38:01,684 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-24 17:38:01,684 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-24 17:38:01,689 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,692 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,693 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,696 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,701 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,703 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,705 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,705 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,711 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-24 17:38:01,712 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-24 17:38:01,712 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-24 17:38:01,712 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-24 17:38:01,712 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (1/1) ... [2025-04-24 17:38:01,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-24 17:38:01,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-24 17:38:01,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-24 17:38:01,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-24 17:38:01,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-24 17:38:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-24 17:38:01,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-24 17:38:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-24 17:38:01,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-24 17:38:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-24 17:38:01,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-24 17:38:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-04-24 17:38:01,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-04-24 17:38:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-04-24 17:38:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-24 17:38:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-24 17:38:01,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-24 17:38:01,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-24 17:38:01,767 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-24 17:38:01,833 INFO L234 CfgBuilder]: Building ICFG [2025-04-24 17:38:01,834 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-24 17:38:01,983 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-24 17:38:01,984 INFO L283 CfgBuilder]: Performing block encoding [2025-04-24 17:38:02,066 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-24 17:38:02,066 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-24 17:38:02,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.04 05:38:02 BoogieIcfgContainer [2025-04-24 17:38:02,066 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-24 17:38:02,068 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-24 17:38:02,068 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-24 17:38:02,072 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-24 17:38:02,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.04 05:38:01" (1/3) ... [2025-04-24 17:38:02,073 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fecf5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.04 05:38:02, skipping insertion in model container [2025-04-24 17:38:02,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:38:01" (2/3) ... [2025-04-24 17:38:02,073 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fecf5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.04 05:38:02, skipping insertion in model container [2025-04-24 17:38:02,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.04 05:38:02" (3/3) ... [2025-04-24 17:38:02,074 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2025-04-24 17:38:02,083 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-24 17:38:02,085 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-mult-4.wvr.c that has 5 procedures, 37 locations, 36 edges, 1 initial locations, 4 loop locations, and 1 error locations. [2025-04-24 17:38:02,085 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-24 17:38:02,147 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-04-24 17:38:02,185 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-24 17:38:02,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-04-24 17:38:02,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-24 17:38:02,187 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) [2025-04-24 17:38:02,189 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 [2025-04-24 17:38:02,253 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-04-24 17:38:02,275 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2025-04-24 17:38:02,280 INFO L340 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;@168fa9c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-24 17:38:02,280 INFO L341 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-04-24 17:38:02,527 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-24 17:38:02,528 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:38:02,529 INFO L139 ounterexampleChecker]: Examining path program with hash -153638245, occurence #1 [2025-04-24 17:38:02,529 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:38:02,530 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:38:02,533 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:38:02,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2144420087, now seen corresponding path program 1 times [2025-04-24 17:38:02,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:38:02,538 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128179274] [2025-04-24 17:38:02,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:38:02,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:38:02,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 95 statements into 1 equivalence classes. [2025-04-24 17:38:02,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 95 of 95 statements. [2025-04-24 17:38:02,790 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:38:02,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:38:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:38:03,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:38:03,568 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128179274] [2025-04-24 17:38:03,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128179274] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:38:03,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:38:03,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-04-24 17:38:03,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476928424] [2025-04-24 17:38:03,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:38:03,574 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-24 17:38:03,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:38:03,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-24 17:38:03,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-04-24 17:38:03,590 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:38:03,591 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:38:03,593 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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) [2025-04-24 17:38:03,593 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:38:03,983 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-24 17:38:03,984 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-24 17:38:03,985 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-24 17:38:03,985 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:38:03,986 INFO L139 ounterexampleChecker]: Examining path program with hash 951127837, occurence #1 [2025-04-24 17:38:03,986 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:38:03,986 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:38:03,986 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:38:03,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1383679018, now seen corresponding path program 2 times [2025-04-24 17:38:03,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:38:03,988 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095970050] [2025-04-24 17:38:03,988 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-24 17:38:03,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:38:04,002 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 80 statements into 2 equivalence classes. [2025-04-24 17:38:04,054 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 80 of 80 statements. [2025-04-24 17:38:04,058 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-24 17:38:04,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:38:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-04-24 17:38:04,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:38:04,512 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095970050] [2025-04-24 17:38:04,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095970050] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-24 17:38:04,513 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124793187] [2025-04-24 17:38:04,513 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-24 17:38:04,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-24 17:38:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-24 17:38:04,534 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) [2025-04-24 17:38:04,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-24 17:38:04,591 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 80 statements into 2 equivalence classes. [2025-04-24 17:38:04,639 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 80 of 80 statements. [2025-04-24 17:38:04,639 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-24 17:38:04,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:38:04,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-04-24 17:38:04,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-24 17:38:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:38:05,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-24 17:38:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:38:05,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124793187] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-24 17:38:05,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-24 17:38:05,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 37 [2025-04-24 17:38:05,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712405879] [2025-04-24 17:38:05,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-24 17:38:05,652 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-04-24 17:38:05,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:38:05,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-04-24 17:38:05,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2025-04-24 17:38:05,653 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:38:05,655 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:38:05,655 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.0) internal successors, (185), 37 states have internal predecessors, (185), 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) [2025-04-24 17:38:05,656 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 13 states. [2025-04-24 17:38:05,656 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:38:20,195 WARN L286 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 47 DAG size of output: 35 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 17:38:34,535 WARN L286 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 40 DAG size of output: 29 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 17:38:50,274 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 33 DAG size of output: 26 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 17:39:09,666 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-04-24 17:39:09,667 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2025-04-24 17:39:09,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-24 17:39:09,867 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2025-04-24 17:39:09,867 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-04-24 17:39:09,867 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:39:09,868 INFO L139 ounterexampleChecker]: Examining path program with hash -73031663, occurence #1 [2025-04-24 17:39:09,868 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:39:09,868 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:39:09,869 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:39:09,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1532452715, now seen corresponding path program 3 times [2025-04-24 17:39:09,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:39:09,869 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993740053] [2025-04-24 17:39:09,869 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-24 17:39:09,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:39:09,892 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 227 statements into 13 equivalence classes. [2025-04-24 17:39:10,420 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 227 of 227 statements. [2025-04-24 17:39:10,420 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-04-24 17:39:10,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:44:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 899 refuted. 38 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:44:29,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:44:29,864 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993740053] [2025-04-24 17:44:29,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993740053] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-24 17:44:29,864 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529183167] [2025-04-24 17:44:29,864 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-24 17:44:29,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-24 17:44:29,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-24 17:44:29,866 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) [2025-04-24 17:44:29,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-24 17:44:29,914 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 227 statements into 13 equivalence classes. [2025-04-24 17:44:30,800 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 227 of 227 statements. [2025-04-24 17:44:30,800 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-04-24 17:44:30,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:44:30,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 74 conjuncts are in the unsatisfiable core [2025-04-24 17:44:30,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-24 17:44:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:44:44,770 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-24 17:45:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:45:07,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529183167] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-24 17:45:07,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-24 17:45:07,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 39, 39] total 137 [2025-04-24 17:45:07,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284678033] [2025-04-24 17:45:07,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-24 17:45:07,719 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2025-04-24 17:45:07,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:45:07,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2025-04-24 17:45:07,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1123, Invalid=17461, Unknown=48, NotChecked=0, Total=18632 [2025-04-24 17:45:07,728 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:45:07,729 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:45:07,729 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 4.824817518248175) internal successors, (661), 137 states have internal predecessors, (661), 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) [2025-04-24 17:45:07,729 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 15 states. [2025-04-24 17:45:07,729 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 91 states. [2025-04-24 17:45:07,729 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:45:13,282 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-24 17:45:37,955 WARN L286 SmtUtils]: Spent 13.42s on a formula simplification. DAG size of input: 83 DAG size of output: 82 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 17:46:39,460 WARN L286 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 84 DAG size of output: 46 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 17:46:41,812 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-24 17:47:16,700 WARN L286 SmtUtils]: Spent 21.66s on a formula simplification. DAG size of input: 81 DAG size of output: 80 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)