./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:35:21,749 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:35:21,793 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:35:21,799 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:35:21,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:35:21,819 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:35:21,819 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:35:21,819 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:35:21,820 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:35:21,820 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:35:21,820 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:35:21,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:35:21,821 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:35:21,821 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:35:21,822 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:35:21,822 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:35:21,822 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:35:21,822 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:35:21,823 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:35:21,823 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:35:21,823 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:35:21,823 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:35:21,824 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:35:21,824 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:35:21,824 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:35:21,824 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:35:21,824 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:35:21,825 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:35:21,825 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:35:21,825 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:35:21,825 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:35:21,825 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:35:21,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:35:21,826 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:35:21,826 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:35:21,826 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:35:21,827 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:35:21,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:35:21,827 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:35:21,827 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:35:21,827 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:35:21,828 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:35:21,828 INFO L153 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-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-10-11 14:35:22,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:35:22,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:35:22,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:35:22,059 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:35:22,059 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:35:22,060 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-10-11 14:35:23,221 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:35:23,415 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:35:23,415 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-10-11 14:35:23,421 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/e37506fe6/94683d6b6f8440adb12dfa01b6c90a97/FLAGb9a0d4f0d [2024-10-11 14:35:23,781 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/e37506fe6/94683d6b6f8440adb12dfa01b6c90a97 [2024-10-11 14:35:23,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:35:23,784 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:35:23,785 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:35:23,785 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:35:23,789 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:35:23,789 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:35:23" (1/1) ... [2024-10-11 14:35:23,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@750d8e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:23, skipping insertion in model container [2024-10-11 14:35:23,791 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:35:23" (1/1) ... [2024-10-11 14:35:23,810 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:35:23,971 WARN L248 ndardFunctionHandler]: 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-send-receive-alt.wvr.c[2676,2689] [2024-10-11 14:35:23,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:35:23,990 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:35:24,008 WARN L248 ndardFunctionHandler]: 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-send-receive-alt.wvr.c[2676,2689] [2024-10-11 14:35:24,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:35:24,025 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:35:24,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24 WrapperNode [2024-10-11 14:35:24,025 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:35:24,026 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:35:24,026 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:35:24,026 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:35:24,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (1/1) ... [2024-10-11 14:35:24,035 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (1/1) ... [2024-10-11 14:35:24,050 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 139 [2024-10-11 14:35:24,051 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:35:24,051 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:35:24,051 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:35:24,051 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:35:24,061 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (1/1) ... [2024-10-11 14:35:24,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (1/1) ... [2024-10-11 14:35:24,063 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (1/1) ... [2024-10-11 14:35:24,073 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-11 14:35:24,073 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (1/1) ... [2024-10-11 14:35:24,073 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (1/1) ... [2024-10-11 14:35:24,077 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (1/1) ... [2024-10-11 14:35:24,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (1/1) ... [2024-10-11 14:35:24,081 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (1/1) ... [2024-10-11 14:35:24,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (1/1) ... [2024-10-11 14:35:24,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:35:24,087 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:35:24,087 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:35:24,088 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:35:24,088 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (1/1) ... [2024-10-11 14:35:24,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:35:24,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:24,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:35:24,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:35:24,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:35:24,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:35:24,164 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:35:24,164 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:35:24,164 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:35:24,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:35:24,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:35:24,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:35:24,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:35:24,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:35:24,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:35:24,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:35:24,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:35:24,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:35:24,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:35:24,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:35:24,168 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:35:24,253 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:35:24,255 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:35:24,473 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:35:24,473 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:35:24,619 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:35:24,620 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 14:35:24,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:35:24 BoogieIcfgContainer [2024-10-11 14:35:24,620 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:35:24,622 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:35:24,622 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:35:24,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:35:24,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:35:23" (1/3) ... [2024-10-11 14:35:24,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6e657e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:35:24, skipping insertion in model container [2024-10-11 14:35:24,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:24" (2/3) ... [2024-10-11 14:35:24,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6e657e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:35:24, skipping insertion in model container [2024-10-11 14:35:24,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:35:24" (3/3) ... [2024-10-11 14:35:24,627 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-10-11 14:35:24,639 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:35:24,639 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:35:24,639 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:35:24,679 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:35:24,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 32 transitions, 78 flow [2024-10-11 14:35:24,725 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2024-10-11 14:35:24,725 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:35:24,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 30 events. 6/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-10-11 14:35:24,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 32 transitions, 78 flow [2024-10-11 14:35:24,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 29 transitions, 70 flow [2024-10-11 14:35:24,737 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:35:24,742 INFO L333 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=PETRI_NET, 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;@6c8757e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:35:24,742 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:35:24,750 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:35:24,750 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-10-11 14:35:24,750 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:35:24,750 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:24,751 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:24,751 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:24,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:24,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1889599126, now seen corresponding path program 1 times [2024-10-11 14:35:24,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:24,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084800473] [2024-10-11 14:35:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:24,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:24,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:24,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084800473] [2024-10-11 14:35:24,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084800473] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:24,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:24,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:35:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694461084] [2024-10-11 14:35:24,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:24,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 14:35:24,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:24,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 14:35:24,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 14:35:24,959 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:35:24,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 70 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 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) [2024-10-11 14:35:24,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:24,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:35:24,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:25,047 INFO L124 PetriNetUnfolderBase]: 158/290 cut-off events. [2024-10-11 14:35:25,048 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-10-11 14:35:25,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 290 events. 158/290 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1053 event pairs, 116 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 513. Up to 253 conditions per place. [2024-10-11 14:35:25,055 INFO L140 encePairwiseOnDemand]: 30/32 looper letters, 22 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2024-10-11 14:35:25,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 110 flow [2024-10-11 14:35:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 14:35:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 14:35:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 38 transitions. [2024-10-11 14:35:25,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-10-11 14:35:25,068 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 70 flow. Second operand 2 states and 38 transitions. [2024-10-11 14:35:25,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 110 flow [2024-10-11 14:35:25,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:35:25,072 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 58 flow [2024-10-11 14:35:25,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2024-10-11 14:35:25,076 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2024-10-11 14:35:25,076 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 58 flow [2024-10-11 14:35:25,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 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) [2024-10-11 14:35:25,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:25,076 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:25,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:35:25,076 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:25,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:25,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1159708757, now seen corresponding path program 1 times [2024-10-11 14:35:25,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:25,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106480669] [2024-10-11 14:35:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:25,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:25,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:25,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106480669] [2024-10-11 14:35:25,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106480669] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:25,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:25,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:35:25,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352500796] [2024-10-11 14:35:25,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:25,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:35:25,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:25,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:35:25,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:35:25,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:35:25,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2024-10-11 14:35:25,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:25,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:35:25,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:25,353 INFO L124 PetriNetUnfolderBase]: 256/457 cut-off events. [2024-10-11 14:35:25,353 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-11 14:35:25,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 457 events. 256/457 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1837 event pairs, 96 based on Foata normal form. 1/393 useless extension candidates. Maximal degree in co-relation 893. Up to 228 conditions per place. [2024-10-11 14:35:25,356 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 34 selfloop transitions, 2 changer transitions 3/44 dead transitions. [2024-10-11 14:35:25,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 44 transitions, 173 flow [2024-10-11 14:35:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:35:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:35:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-10-11 14:35:25,358 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-10-11 14:35:25,358 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 58 flow. Second operand 3 states and 61 transitions. [2024-10-11 14:35:25,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 44 transitions, 173 flow [2024-10-11 14:35:25,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:35:25,360 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 70 flow [2024-10-11 14:35:25,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2024-10-11 14:35:25,361 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2024-10-11 14:35:25,361 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 70 flow [2024-10-11 14:35:25,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2024-10-11 14:35:25,362 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:25,362 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:25,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:35:25,363 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:25,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:25,363 INFO L85 PathProgramCache]: Analyzing trace with hash -930542238, now seen corresponding path program 1 times [2024-10-11 14:35:25,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:25,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972390899] [2024-10-11 14:35:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:25,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:25,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:25,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972390899] [2024-10-11 14:35:25,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972390899] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:25,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:25,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:35:25,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357441323] [2024-10-11 14:35:25,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:25,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:35:25,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:25,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:35:25,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:35:25,472 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:35:25,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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) [2024-10-11 14:35:25,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:25,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:35:25,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:25,579 INFO L124 PetriNetUnfolderBase]: 287/534 cut-off events. [2024-10-11 14:35:25,579 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-11 14:35:25,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 534 events. 287/534 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2139 event pairs, 126 based on Foata normal form. 14/459 useless extension candidates. Maximal degree in co-relation 1051. Up to 318 conditions per place. [2024-10-11 14:35:25,581 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 27 selfloop transitions, 3 changer transitions 6/41 dead transitions. [2024-10-11 14:35:25,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 170 flow [2024-10-11 14:35:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:35:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:35:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-10-11 14:35:25,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-10-11 14:35:25,583 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 70 flow. Second operand 3 states and 57 transitions. [2024-10-11 14:35:25,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 170 flow [2024-10-11 14:35:25,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:35:25,584 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 87 flow [2024-10-11 14:35:25,584 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-10-11 14:35:25,585 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2024-10-11 14:35:25,585 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 87 flow [2024-10-11 14:35:25,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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) [2024-10-11 14:35:25,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:25,585 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:25,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:35:25,586 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:25,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:25,586 INFO L85 PathProgramCache]: Analyzing trace with hash -487430840, now seen corresponding path program 1 times [2024-10-11 14:35:25,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:25,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948389314] [2024-10-11 14:35:25,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:25,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:25,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:25,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948389314] [2024-10-11 14:35:25,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948389314] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:25,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:25,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:35:25,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319201713] [2024-10-11 14:35:25,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:25,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:35:25,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:25,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:35:25,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:35:25,724 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:35:25,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2024-10-11 14:35:25,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:25,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:35:25,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:25,821 INFO L124 PetriNetUnfolderBase]: 355/668 cut-off events. [2024-10-11 14:35:25,821 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2024-10-11 14:35:25,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 668 events. 355/668 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2928 event pairs, 289 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 1416. Up to 480 conditions per place. [2024-10-11 14:35:25,826 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 24 selfloop transitions, 2 changer transitions 15/46 dead transitions. [2024-10-11 14:35:25,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 205 flow [2024-10-11 14:35:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:35:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:35:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-10-11 14:35:25,827 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-10-11 14:35:25,827 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 87 flow. Second operand 4 states and 67 transitions. [2024-10-11 14:35:25,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 205 flow [2024-10-11 14:35:25,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:35:25,829 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 98 flow [2024-10-11 14:35:25,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-10-11 14:35:25,829 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-10-11 14:35:25,830 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 98 flow [2024-10-11 14:35:25,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2024-10-11 14:35:25,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:25,830 INFO L204 CegarLoopForPetriNet]: trace histogram [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] [2024-10-11 14:35:25,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:35:25,830 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:25,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:25,831 INFO L85 PathProgramCache]: Analyzing trace with hash 909190841, now seen corresponding path program 1 times [2024-10-11 14:35:25,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:25,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231680557] [2024-10-11 14:35:25,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:25,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:26,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:26,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231680557] [2024-10-11 14:35:26,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231680557] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:26,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559707430] [2024-10-11 14:35:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:26,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:26,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:26,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:26,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:35:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:26,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 14:35:26,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:26,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-11 14:35:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:26,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:27,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-10-11 14:35:27,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:27,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-10-11 14:35:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:27,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559707430] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:27,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:27,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-10-11 14:35:27,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139403994] [2024-10-11 14:35:27,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:27,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:35:27,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:35:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:35:27,509 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:35:27,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 98 flow. Second operand has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 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) [2024-10-11 14:35:27,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:27,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:35:27,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:28,443 INFO L124 PetriNetUnfolderBase]: 1195/2237 cut-off events. [2024-10-11 14:35:28,443 INFO L125 PetriNetUnfolderBase]: For 494/494 co-relation queries the response was YES. [2024-10-11 14:35:28,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4794 conditions, 2237 events. 1195/2237 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12321 event pairs, 330 based on Foata normal form. 19/2012 useless extension candidates. Maximal degree in co-relation 4786. Up to 500 conditions per place. [2024-10-11 14:35:28,452 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 116 selfloop transitions, 28 changer transitions 30/179 dead transitions. [2024-10-11 14:35:28,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 179 transitions, 852 flow [2024-10-11 14:35:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 14:35:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-11 14:35:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 281 transitions. [2024-10-11 14:35:28,455 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5854166666666667 [2024-10-11 14:35:28,455 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 98 flow. Second operand 15 states and 281 transitions. [2024-10-11 14:35:28,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 179 transitions, 852 flow [2024-10-11 14:35:28,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 179 transitions, 828 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-10-11 14:35:28,459 INFO L231 Difference]: Finished difference. Result has 55 places, 63 transitions, 353 flow [2024-10-11 14:35:28,459 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=353, PETRI_PLACES=55, PETRI_TRANSITIONS=63} [2024-10-11 14:35:28,460 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-10-11 14:35:28,460 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 63 transitions, 353 flow [2024-10-11 14:35:28,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 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) [2024-10-11 14:35:28,460 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:28,460 INFO L204 CegarLoopForPetriNet]: trace histogram [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] [2024-10-11 14:35:28,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:35:28,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:28,665 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:28,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash 110229209, now seen corresponding path program 1 times [2024-10-11 14:35:28,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:28,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967875165] [2024-10-11 14:35:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:28,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:28,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:28,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967875165] [2024-10-11 14:35:28,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967875165] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:28,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:28,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:35:28,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083013757] [2024-10-11 14:35:28,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:28,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:35:28,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:28,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:35:28,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:35:28,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-10-11 14:35:28,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 63 transitions, 353 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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) [2024-10-11 14:35:28,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:28,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-10-11 14:35:28,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:28,885 INFO L124 PetriNetUnfolderBase]: 1252/2195 cut-off events. [2024-10-11 14:35:28,885 INFO L125 PetriNetUnfolderBase]: For 1271/1271 co-relation queries the response was YES. [2024-10-11 14:35:28,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5355 conditions, 2195 events. 1252/2195 cut-off events. For 1271/1271 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 11149 event pairs, 765 based on Foata normal form. 22/2064 useless extension candidates. Maximal degree in co-relation 5340. Up to 1734 conditions per place. [2024-10-11 14:35:28,892 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 62 selfloop transitions, 2 changer transitions 3/70 dead transitions. [2024-10-11 14:35:28,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 486 flow [2024-10-11 14:35:28,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:35:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:35:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-10-11 14:35:28,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-10-11 14:35:28,894 INFO L175 Difference]: Start difference. First operand has 55 places, 63 transitions, 353 flow. Second operand 3 states and 54 transitions. [2024-10-11 14:35:28,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 486 flow [2024-10-11 14:35:28,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 442 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-10-11 14:35:28,901 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 250 flow [2024-10-11 14:35:28,902 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-10-11 14:35:28,903 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-10-11 14:35:28,903 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 250 flow [2024-10-11 14:35:28,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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) [2024-10-11 14:35:28,904 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:28,904 INFO L204 CegarLoopForPetriNet]: trace histogram [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] [2024-10-11 14:35:28,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:35:28,904 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:28,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash -507859114, now seen corresponding path program 2 times [2024-10-11 14:35:28,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:28,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437504873] [2024-10-11 14:35:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:29,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:29,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437504873] [2024-10-11 14:35:29,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437504873] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:29,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039676991] [2024-10-11 14:35:29,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:35:29,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:29,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:29,472 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:29,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:35:29,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:35:29,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:29,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 14:35:29,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:29,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:29,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:29,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-10-11 14:35:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:35:29,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039676991] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:29,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:29,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 13 [2024-10-11 14:35:29,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451670150] [2024-10-11 14:35:29,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:29,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 14:35:29,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:29,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 14:35:29,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:35:29,741 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:35:29,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 250 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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) [2024-10-11 14:35:29,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:29,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:35:29,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:30,065 INFO L124 PetriNetUnfolderBase]: 1143/2115 cut-off events. [2024-10-11 14:35:30,065 INFO L125 PetriNetUnfolderBase]: For 1087/1087 co-relation queries the response was YES. [2024-10-11 14:35:30,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5136 conditions, 2115 events. 1143/2115 cut-off events. For 1087/1087 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11300 event pairs, 309 based on Foata normal form. 1/1968 useless extension candidates. Maximal degree in co-relation 5119. Up to 673 conditions per place. [2024-10-11 14:35:30,074 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 73 selfloop transitions, 14 changer transitions 16/109 dead transitions. [2024-10-11 14:35:30,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 625 flow [2024-10-11 14:35:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:35:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:35:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-10-11 14:35:30,075 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-10-11 14:35:30,075 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 250 flow. Second operand 9 states and 147 transitions. [2024-10-11 14:35:30,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 625 flow [2024-10-11 14:35:30,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 109 transitions, 622 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:35:30,079 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 316 flow [2024-10-11 14:35:30,079 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-10-11 14:35:30,080 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-10-11 14:35:30,080 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 316 flow [2024-10-11 14:35:30,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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) [2024-10-11 14:35:30,080 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:30,080 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:30,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 14:35:30,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:30,282 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:30,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:30,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1977149039, now seen corresponding path program 3 times [2024-10-11 14:35:30,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:30,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202009421] [2024-10-11 14:35:30,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:30,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:35:30,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:30,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202009421] [2024-10-11 14:35:30,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202009421] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:30,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176936507] [2024-10-11 14:35:30,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:35:30,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:30,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:30,350 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:30,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:35:30,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 14:35:30,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:30,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 14:35:30,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 14:35:30,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:35:30,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176936507] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:30,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:30,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-10-11 14:35:30,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121691984] [2024-10-11 14:35:30,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:30,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:35:30,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:30,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:35:30,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:35:30,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:35:30,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 316 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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) [2024-10-11 14:35:30,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:30,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:35:30,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:30,805 INFO L124 PetriNetUnfolderBase]: 1943/3679 cut-off events. [2024-10-11 14:35:30,805 INFO L125 PetriNetUnfolderBase]: For 2560/2560 co-relation queries the response was YES. [2024-10-11 14:35:30,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8983 conditions, 3679 events. 1943/3679 cut-off events. For 2560/2560 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 22067 event pairs, 752 based on Foata normal form. 40/3481 useless extension candidates. Maximal degree in co-relation 8964. Up to 1434 conditions per place. [2024-10-11 14:35:30,817 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 72 selfloop transitions, 23 changer transitions 0/101 dead transitions. [2024-10-11 14:35:30,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 101 transitions, 716 flow [2024-10-11 14:35:30,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:35:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:35:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-10-11 14:35:30,819 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-11 14:35:30,819 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 316 flow. Second operand 4 states and 80 transitions. [2024-10-11 14:35:30,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 101 transitions, 716 flow [2024-10-11 14:35:30,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 655 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-10-11 14:35:30,826 INFO L231 Difference]: Finished difference. Result has 62 places, 76 transitions, 506 flow [2024-10-11 14:35:30,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=506, PETRI_PLACES=62, PETRI_TRANSITIONS=76} [2024-10-11 14:35:30,826 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-10-11 14:35:30,826 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 76 transitions, 506 flow [2024-10-11 14:35:30,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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) [2024-10-11 14:35:30,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:30,827 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:30,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:35:31,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:31,028 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:31,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:31,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1805096591, now seen corresponding path program 4 times [2024-10-11 14:35:31,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:31,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304221069] [2024-10-11 14:35:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:31,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:35:31,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:31,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304221069] [2024-10-11 14:35:31,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304221069] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:31,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:31,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:35:31,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933406455] [2024-10-11 14:35:31,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:31,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:35:31,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:31,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:35:31,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:35:31,136 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 32 [2024-10-11 14:35:31,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 76 transitions, 506 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-10-11 14:35:31,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:31,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 32 [2024-10-11 14:35:31,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:31,476 INFO L124 PetriNetUnfolderBase]: 2701/4703 cut-off events. [2024-10-11 14:35:31,476 INFO L125 PetriNetUnfolderBase]: For 4078/4078 co-relation queries the response was YES. [2024-10-11 14:35:31,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12381 conditions, 4703 events. 2701/4703 cut-off events. For 4078/4078 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 25585 event pairs, 542 based on Foata normal form. 242/4588 useless extension candidates. Maximal degree in co-relation 12362. Up to 2391 conditions per place. [2024-10-11 14:35:31,493 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 80 selfloop transitions, 4 changer transitions 4/90 dead transitions. [2024-10-11 14:35:31,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 90 transitions, 752 flow [2024-10-11 14:35:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:35:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:35:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-10-11 14:35:31,494 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2024-10-11 14:35:31,494 INFO L175 Difference]: Start difference. First operand has 62 places, 76 transitions, 506 flow. Second operand 4 states and 63 transitions. [2024-10-11 14:35:31,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 90 transitions, 752 flow [2024-10-11 14:35:31,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 742 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-10-11 14:35:31,501 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 406 flow [2024-10-11 14:35:31,501 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=406, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-10-11 14:35:31,502 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-10-11 14:35:31,502 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 406 flow [2024-10-11 14:35:31,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-10-11 14:35:31,503 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:31,503 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:31,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:35:31,503 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:31,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash -926560523, now seen corresponding path program 1 times [2024-10-11 14:35:31,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:31,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555668682] [2024-10-11 14:35:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:31,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:32,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:32,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555668682] [2024-10-11 14:35:32,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555668682] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:32,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743988875] [2024-10-11 14:35:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:32,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:32,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:32,223 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:32,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:35:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:32,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 14:35:32,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:32,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:32,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:32,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-10-11 14:35:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743988875] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:33,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:33,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-10-11 14:35:33,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964098132] [2024-10-11 14:35:33,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:33,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 14:35:33,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:33,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 14:35:33,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2024-10-11 14:35:33,161 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:35:33,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 406 flow. Second operand has 30 states, 30 states have (on average 9.666666666666666) internal successors, (290), 30 states have internal predecessors, (290), 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) [2024-10-11 14:35:33,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:33,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:35:33,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:36,327 INFO L124 PetriNetUnfolderBase]: 6383/12286 cut-off events. [2024-10-11 14:35:36,327 INFO L125 PetriNetUnfolderBase]: For 15433/15441 co-relation queries the response was YES. [2024-10-11 14:35:36,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33400 conditions, 12286 events. 6383/12286 cut-off events. For 15433/15441 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 86891 event pairs, 899 based on Foata normal form. 82/11535 useless extension candidates. Maximal degree in co-relation 33379. Up to 2055 conditions per place. [2024-10-11 14:35:36,424 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 357 selfloop transitions, 124 changer transitions 170/658 dead transitions. [2024-10-11 14:35:36,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 658 transitions, 3942 flow [2024-10-11 14:35:36,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-10-11 14:35:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-10-11 14:35:36,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 1018 transitions. [2024-10-11 14:35:36,428 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5680803571428571 [2024-10-11 14:35:36,428 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 406 flow. Second operand 56 states and 1018 transitions. [2024-10-11 14:35:36,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 658 transitions, 3942 flow [2024-10-11 14:35:36,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 658 transitions, 3935 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-11 14:35:36,449 INFO L231 Difference]: Finished difference. Result has 148 places, 185 transitions, 2000 flow [2024-10-11 14:35:36,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=2000, PETRI_PLACES=148, PETRI_TRANSITIONS=185} [2024-10-11 14:35:36,449 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-10-11 14:35:36,450 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 185 transitions, 2000 flow [2024-10-11 14:35:36,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.666666666666666) internal successors, (290), 30 states have internal predecessors, (290), 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) [2024-10-11 14:35:36,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:36,450 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:36,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 14:35:36,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:35:36,651 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:36,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:36,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1337116099, now seen corresponding path program 2 times [2024-10-11 14:35:36,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:36,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71168506] [2024-10-11 14:35:36,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:36,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:37,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:37,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71168506] [2024-10-11 14:35:37,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71168506] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:37,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550481264] [2024-10-11 14:35:37,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:35:37,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:37,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:37,643 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:37,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:35:37,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:35:37,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:37,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:35:37,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:38,164 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-10-11 14:35:38,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2024-10-11 14:35:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:38,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:38,471 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-10-11 14:35:38,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-10-11 14:35:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:38,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550481264] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:38,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:38,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-10-11 14:35:38,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152352550] [2024-10-11 14:35:38,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:38,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 14:35:38,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:38,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 14:35:38,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2024-10-11 14:35:38,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:35:38,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 185 transitions, 2000 flow. Second operand has 29 states, 29 states have (on average 9.89655172413793) internal successors, (287), 29 states have internal predecessors, (287), 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) [2024-10-11 14:35:38,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:38,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:35:38,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:44,853 INFO L124 PetriNetUnfolderBase]: 15697/30276 cut-off events. [2024-10-11 14:35:44,853 INFO L125 PetriNetUnfolderBase]: For 109144/109144 co-relation queries the response was YES. [2024-10-11 14:35:44,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93956 conditions, 30276 events. 15697/30276 cut-off events. For 109144/109144 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 246225 event pairs, 3338 based on Foata normal form. 41/28320 useless extension candidates. Maximal degree in co-relation 93904. Up to 4975 conditions per place. [2024-10-11 14:35:45,055 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 432 selfloop transitions, 263 changer transitions 119/821 dead transitions. [2024-10-11 14:35:45,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 821 transitions, 7940 flow [2024-10-11 14:35:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-11 14:35:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-10-11 14:35:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 793 transitions. [2024-10-11 14:35:45,058 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763081395348837 [2024-10-11 14:35:45,058 INFO L175 Difference]: Start difference. First operand has 148 places, 185 transitions, 2000 flow. Second operand 43 states and 793 transitions. [2024-10-11 14:35:45,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 821 transitions, 7940 flow [2024-10-11 14:35:45,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 821 transitions, 6768 flow, removed 577 selfloop flow, removed 7 redundant places. [2024-10-11 14:35:45,682 INFO L231 Difference]: Finished difference. Result has 209 places, 384 transitions, 4706 flow [2024-10-11 14:35:45,682 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=4706, PETRI_PLACES=209, PETRI_TRANSITIONS=384} [2024-10-11 14:35:45,683 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-10-11 14:35:45,683 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 384 transitions, 4706 flow [2024-10-11 14:35:45,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.89655172413793) internal successors, (287), 29 states have internal predecessors, (287), 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) [2024-10-11 14:35:45,683 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:45,683 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:45,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:35:45,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 14:35:45,885 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:45,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:45,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2122004758, now seen corresponding path program 3 times [2024-10-11 14:35:45,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:45,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478529711] [2024-10-11 14:35:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:45,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:47,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:47,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478529711] [2024-10-11 14:35:47,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478529711] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:47,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84784585] [2024-10-11 14:35:47,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:35:47,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:47,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:47,290 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:47,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:35:47,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-11 14:35:47,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:47,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 14:35:47,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:47,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:47,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:47,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-10-11 14:35:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:35:47,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84784585] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:47,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:47,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 23 [2024-10-11 14:35:47,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458388249] [2024-10-11 14:35:47,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:47,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:35:47,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:47,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:35:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:35:47,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:35:47,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 384 transitions, 4706 flow. Second operand has 24 states, 24 states have (on average 10.541666666666666) internal successors, (253), 24 states have internal predecessors, (253), 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) [2024-10-11 14:35:47,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:47,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:35:47,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:53,239 INFO L124 PetriNetUnfolderBase]: 16750/32115 cut-off events. [2024-10-11 14:35:53,239 INFO L125 PetriNetUnfolderBase]: For 183881/183881 co-relation queries the response was YES. [2024-10-11 14:35:53,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108453 conditions, 32115 events. 16750/32115 cut-off events. For 183881/183881 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 263052 event pairs, 7258 based on Foata normal form. 2/29985 useless extension candidates. Maximal degree in co-relation 108375. Up to 22496 conditions per place. [2024-10-11 14:35:53,470 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 420 selfloop transitions, 69 changer transitions 56/552 dead transitions. [2024-10-11 14:35:53,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 552 transitions, 6805 flow [2024-10-11 14:35:53,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 14:35:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-11 14:35:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 305 transitions. [2024-10-11 14:35:53,472 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5295138888888888 [2024-10-11 14:35:53,472 INFO L175 Difference]: Start difference. First operand has 209 places, 384 transitions, 4706 flow. Second operand 18 states and 305 transitions. [2024-10-11 14:35:53,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 552 transitions, 6805 flow [2024-10-11 14:35:55,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 552 transitions, 5664 flow, removed 554 selfloop flow, removed 12 redundant places. [2024-10-11 14:35:55,141 INFO L231 Difference]: Finished difference. Result has 218 places, 401 transitions, 4148 flow [2024-10-11 14:35:55,141 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3783, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4148, PETRI_PLACES=218, PETRI_TRANSITIONS=401} [2024-10-11 14:35:55,142 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2024-10-11 14:35:55,142 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 401 transitions, 4148 flow [2024-10-11 14:35:55,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.541666666666666) internal successors, (253), 24 states have internal predecessors, (253), 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) [2024-10-11 14:35:55,142 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:55,142 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:55,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:35:55,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 14:35:55,343 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:55,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash -280887448, now seen corresponding path program 4 times [2024-10-11 14:35:55,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:55,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528190641] [2024-10-11 14:35:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:56,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:56,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528190641] [2024-10-11 14:35:56,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528190641] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:56,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869955890] [2024-10-11 14:35:56,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:35:56,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:56,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:56,153 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:56,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:35:56,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:35:56,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:56,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 14:35:56,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:56,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:56,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:56,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-10-11 14:35:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:35:56,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869955890] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:56,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:56,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 23 [2024-10-11 14:35:56,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161097481] [2024-10-11 14:35:56,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:56,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:35:56,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:56,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:35:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:35:56,677 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:35:56,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 401 transitions, 4148 flow. Second operand has 24 states, 24 states have (on average 10.541666666666666) internal successors, (253), 24 states have internal predecessors, (253), 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) [2024-10-11 14:35:56,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:56,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:35:56,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:01,997 INFO L124 PetriNetUnfolderBase]: 17300/33259 cut-off events. [2024-10-11 14:36:01,997 INFO L125 PetriNetUnfolderBase]: For 143498/143498 co-relation queries the response was YES. [2024-10-11 14:36:02,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105396 conditions, 33259 events. 17300/33259 cut-off events. For 143498/143498 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 275388 event pairs, 7295 based on Foata normal form. 4/31062 useless extension candidates. Maximal degree in co-relation 105315. Up to 21756 conditions per place. [2024-10-11 14:36:02,231 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 412 selfloop transitions, 79 changer transitions 60/558 dead transitions. [2024-10-11 14:36:02,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 558 transitions, 5971 flow [2024-10-11 14:36:02,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 14:36:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-11 14:36:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 324 transitions. [2024-10-11 14:36:02,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5328947368421053 [2024-10-11 14:36:02,233 INFO L175 Difference]: Start difference. First operand has 218 places, 401 transitions, 4148 flow. Second operand 19 states and 324 transitions. [2024-10-11 14:36:02,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 558 transitions, 5971 flow [2024-10-11 14:36:03,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 558 transitions, 5858 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-10-11 14:36:03,451 INFO L231 Difference]: Finished difference. Result has 233 places, 408 transitions, 4367 flow [2024-10-11 14:36:03,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4044, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4367, PETRI_PLACES=233, PETRI_TRANSITIONS=408} [2024-10-11 14:36:03,451 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2024-10-11 14:36:03,451 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 408 transitions, 4367 flow [2024-10-11 14:36:03,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.541666666666666) internal successors, (253), 24 states have internal predecessors, (253), 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) [2024-10-11 14:36:03,452 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:03,452 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:03,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 14:36:03,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:03,652 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:03,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:03,653 INFO L85 PathProgramCache]: Analyzing trace with hash -244335542, now seen corresponding path program 5 times [2024-10-11 14:36:03,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:03,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572564746] [2024-10-11 14:36:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:36:03,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:03,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572564746] [2024-10-11 14:36:03,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572564746] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:03,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468722816] [2024-10-11 14:36:03,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:36:03,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:03,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:03,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:03,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:36:03,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-11 14:36:03,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:03,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:36:03,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 14:36:03,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:36:03,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468722816] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:03,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:03,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2024-10-11 14:36:03,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948680488] [2024-10-11 14:36:03,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:03,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 14:36:03,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:03,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 14:36:03,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2024-10-11 14:36:03,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:36:03,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 408 transitions, 4367 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 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) [2024-10-11 14:36:03,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:03,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:36:03,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:10,406 INFO L124 PetriNetUnfolderBase]: 22514/43497 cut-off events. [2024-10-11 14:36:10,406 INFO L125 PetriNetUnfolderBase]: For 212891/212891 co-relation queries the response was YES. [2024-10-11 14:36:11,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141152 conditions, 43497 events. 22514/43497 cut-off events. For 212891/212891 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 376621 event pairs, 6398 based on Foata normal form. 146/40772 useless extension candidates. Maximal degree in co-relation 141068. Up to 21175 conditions per place. [2024-10-11 14:36:11,091 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 350 selfloop transitions, 223 changer transitions 0/580 dead transitions. [2024-10-11 14:36:11,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 580 transitions, 7478 flow [2024-10-11 14:36:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:36:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:36:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-10-11 14:36:11,092 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-10-11 14:36:11,092 INFO L175 Difference]: Start difference. First operand has 233 places, 408 transitions, 4367 flow. Second operand 5 states and 102 transitions. [2024-10-11 14:36:11,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 580 transitions, 7478 flow [2024-10-11 14:36:12,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 580 transitions, 7216 flow, removed 58 selfloop flow, removed 21 redundant places. [2024-10-11 14:36:12,910 INFO L231 Difference]: Finished difference. Result has 219 places, 514 transitions, 6534 flow [2024-10-11 14:36:12,910 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6534, PETRI_PLACES=219, PETRI_TRANSITIONS=514} [2024-10-11 14:36:12,910 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2024-10-11 14:36:12,910 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 514 transitions, 6534 flow [2024-10-11 14:36:12,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 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) [2024-10-11 14:36:12,911 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:12,911 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:12,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 14:36:13,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 14:36:13,111 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:13,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash 286188625, now seen corresponding path program 6 times [2024-10-11 14:36:13,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:13,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124287741] [2024-10-11 14:36:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:13,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:36:13,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:13,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124287741] [2024-10-11 14:36:13,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124287741] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:13,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789878375] [2024-10-11 14:36:13,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:36:13,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:13,198 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:13,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:36:13,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-11 14:36:13,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:13,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:36:13,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:36:13,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:36:13,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789878375] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:13,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:13,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-11 14:36:13,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246875452] [2024-10-11 14:36:13,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:13,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:36:13,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:36:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:36:13,462 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:36:13,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 514 transitions, 6534 flow. Second operand has 17 states, 17 states have (on average 11.176470588235293) internal successors, (190), 17 states have internal predecessors, (190), 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) [2024-10-11 14:36:13,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:13,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:36:13,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:20,470 INFO L124 PetriNetUnfolderBase]: 21966/42236 cut-off events. [2024-10-11 14:36:20,470 INFO L125 PetriNetUnfolderBase]: For 226915/226915 co-relation queries the response was YES. [2024-10-11 14:36:20,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142692 conditions, 42236 events. 21966/42236 cut-off events. For 226915/226915 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 369242 event pairs, 11443 based on Foata normal form. 11/39446 useless extension candidates. Maximal degree in co-relation 142612. Up to 36864 conditions per place. [2024-10-11 14:36:20,935 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 489 selfloop transitions, 6 changer transitions 50/552 dead transitions. [2024-10-11 14:36:20,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 552 transitions, 7549 flow [2024-10-11 14:36:20,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:36:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:36:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-10-11 14:36:20,936 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:36:20,936 INFO L175 Difference]: Start difference. First operand has 219 places, 514 transitions, 6534 flow. Second operand 9 states and 144 transitions. [2024-10-11 14:36:20,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 552 transitions, 7549 flow [2024-10-11 14:36:23,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 552 transitions, 7268 flow, removed 134 selfloop flow, removed 1 redundant places. [2024-10-11 14:36:23,186 INFO L231 Difference]: Finished difference. Result has 226 places, 498 transitions, 6027 flow [2024-10-11 14:36:23,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6063, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6027, PETRI_PLACES=226, PETRI_TRANSITIONS=498} [2024-10-11 14:36:23,187 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2024-10-11 14:36:23,187 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 498 transitions, 6027 flow [2024-10-11 14:36:23,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.176470588235293) internal successors, (190), 17 states have internal predecessors, (190), 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) [2024-10-11 14:36:23,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:23,187 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:23,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 14:36:23,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:23,388 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:23,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:23,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1515771856, now seen corresponding path program 7 times [2024-10-11 14:36:23,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:23,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314090628] [2024-10-11 14:36:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:23,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 14:36:23,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:23,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314090628] [2024-10-11 14:36:23,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314090628] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:23,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570888624] [2024-10-11 14:36:23,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:36:23,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:23,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:23,485 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:23,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:36:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:23,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:36:23,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 14:36:23,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 14:36:23,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570888624] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:23,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:23,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-10-11 14:36:23,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327762550] [2024-10-11 14:36:23,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:23,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:36:23,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:36:23,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:36:23,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:36:23,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 498 transitions, 6027 flow. Second operand has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 21 states have internal predecessors, (200), 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) [2024-10-11 14:36:23,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:23,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:36:23,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:25,079 INFO L124 PetriNetUnfolderBase]: 4725/9072 cut-off events. [2024-10-11 14:36:25,079 INFO L125 PetriNetUnfolderBase]: For 54246/54246 co-relation queries the response was YES. [2024-10-11 14:36:25,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31499 conditions, 9072 events. 4725/9072 cut-off events. For 54246/54246 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 63215 event pairs, 3787 based on Foata normal form. 66/8515 useless extension candidates. Maximal degree in co-relation 31418. Up to 7103 conditions per place. [2024-10-11 14:36:25,134 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 87 selfloop transitions, 4 changer transitions 60/158 dead transitions. [2024-10-11 14:36:25,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 158 transitions, 1878 flow [2024-10-11 14:36:25,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:36:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:36:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-10-11 14:36:25,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-10-11 14:36:25,136 INFO L175 Difference]: Start difference. First operand has 226 places, 498 transitions, 6027 flow. Second operand 10 states and 150 transitions. [2024-10-11 14:36:25,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 158 transitions, 1878 flow [2024-10-11 14:36:25,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 158 transitions, 1524 flow, removed 99 selfloop flow, removed 49 redundant places. [2024-10-11 14:36:25,334 INFO L231 Difference]: Finished difference. Result has 123 places, 98 transitions, 962 flow [2024-10-11 14:36:25,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=962, PETRI_PLACES=123, PETRI_TRANSITIONS=98} [2024-10-11 14:36:25,334 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2024-10-11 14:36:25,334 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 98 transitions, 962 flow [2024-10-11 14:36:25,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 21 states have internal predecessors, (200), 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) [2024-10-11 14:36:25,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:25,335 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:25,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 14:36:25,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 14:36:25,535 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:25,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:25,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1077347951, now seen corresponding path program 8 times [2024-10-11 14:36:25,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:25,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295129861] [2024-10-11 14:36:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:25,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:26,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:26,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295129861] [2024-10-11 14:36:26,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295129861] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:26,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639393399] [2024-10-11 14:36:26,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:36:26,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:26,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:26,236 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:26,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:36:26,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:36:26,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:26,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-11 14:36:26,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:26,907 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2024-10-11 14:36:26,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2024-10-11 14:36:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:26,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:27,378 INFO L349 Elim1Store]: treesize reduction 32, result has 70.6 percent of original size [2024-10-11 14:36:27,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 106 [2024-10-11 14:36:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:28,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639393399] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:28,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:28,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2024-10-11 14:36:28,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028653618] [2024-10-11 14:36:28,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:28,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-11 14:36:28,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:28,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-11 14:36:28,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 14:36:28,104 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:36:28,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 98 transitions, 962 flow. Second operand has 39 states, 39 states have (on average 9.692307692307692) internal successors, (378), 39 states have internal predecessors, (378), 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) [2024-10-11 14:36:28,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:28,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:36:28,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:34,144 INFO L124 PetriNetUnfolderBase]: 14614/27974 cut-off events. [2024-10-11 14:36:34,144 INFO L125 PetriNetUnfolderBase]: For 66354/66354 co-relation queries the response was YES. [2024-10-11 14:36:34,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80710 conditions, 27974 events. 14614/27974 cut-off events. For 66354/66354 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 230808 event pairs, 3055 based on Foata normal form. 152/26248 useless extension candidates. Maximal degree in co-relation 80670. Up to 5710 conditions per place. [2024-10-11 14:36:34,242 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 506 selfloop transitions, 264 changer transitions 214/991 dead transitions. [2024-10-11 14:36:34,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 991 transitions, 8210 flow [2024-10-11 14:36:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-10-11 14:36:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2024-10-11 14:36:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 1288 transitions. [2024-10-11 14:36:34,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5669014084507042 [2024-10-11 14:36:34,245 INFO L175 Difference]: Start difference. First operand has 123 places, 98 transitions, 962 flow. Second operand 71 states and 1288 transitions. [2024-10-11 14:36:34,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 991 transitions, 8210 flow [2024-10-11 14:36:34,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 991 transitions, 8110 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-10-11 14:36:34,305 INFO L231 Difference]: Finished difference. Result has 200 places, 358 transitions, 5462 flow [2024-10-11 14:36:34,305 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=5462, PETRI_PLACES=200, PETRI_TRANSITIONS=358} [2024-10-11 14:36:34,305 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2024-10-11 14:36:34,305 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 358 transitions, 5462 flow [2024-10-11 14:36:34,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 9.692307692307692) internal successors, (378), 39 states have internal predecessors, (378), 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) [2024-10-11 14:36:34,306 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:34,306 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:34,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 14:36:34,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 14:36:34,506 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:34,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:34,507 INFO L85 PathProgramCache]: Analyzing trace with hash 790821031, now seen corresponding path program 9 times [2024-10-11 14:36:34,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:34,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461519865] [2024-10-11 14:36:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:34,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:35,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:35,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461519865] [2024-10-11 14:36:35,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461519865] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:35,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732219676] [2024-10-11 14:36:35,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:36:35,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:35,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:35,236 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:35,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:36:35,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-11 14:36:35,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:35,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-11 14:36:35,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:35,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:36:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:35,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:36,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 104 [2024-10-11 14:36:36,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:36:36,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 461 treesize of output 445 [2024-10-11 14:36:37,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2024-10-11 14:36:37,661 INFO L349 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2024-10-11 14:36:37,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 465 treesize of output 377 [2024-10-11 14:36:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:36:37,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732219676] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:37,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:37,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 32 [2024-10-11 14:36:37,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734935289] [2024-10-11 14:36:37,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:37,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 14:36:37,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 14:36:37,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 14:36:37,779 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-10-11 14:36:37,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 358 transitions, 5462 flow. Second operand has 33 states, 33 states have (on average 10.151515151515152) internal successors, (335), 33 states have internal predecessors, (335), 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) [2024-10-11 14:36:37,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:37,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-10-11 14:36:37,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:44,493 INFO L124 PetriNetUnfolderBase]: 16859/32429 cut-off events. [2024-10-11 14:36:44,494 INFO L125 PetriNetUnfolderBase]: For 357442/357442 co-relation queries the response was YES. [2024-10-11 14:36:44,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120791 conditions, 32429 events. 16859/32429 cut-off events. For 357442/357442 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 273611 event pairs, 2379 based on Foata normal form. 694/30887 useless extension candidates. Maximal degree in co-relation 120720. Up to 5575 conditions per place. [2024-10-11 14:36:44,738 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 379 selfloop transitions, 253 changer transitions 306/945 dead transitions. [2024-10-11 14:36:44,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 945 transitions, 11202 flow [2024-10-11 14:36:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-11 14:36:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-10-11 14:36:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 999 transitions. [2024-10-11 14:36:44,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-10-11 14:36:44,740 INFO L175 Difference]: Start difference. First operand has 200 places, 358 transitions, 5462 flow. Second operand 54 states and 999 transitions. [2024-10-11 14:36:44,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 945 transitions, 11202 flow