./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/stack_longer-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 08:02:14,850 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 08:02:14,946 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 08:02:14,951 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 08:02:14,953 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 08:02:14,983 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 08:02:14,984 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 08:02:14,984 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 08:02:14,985 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 08:02:14,986 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 08:02:14,986 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 08:02:14,987 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 08:02:14,987 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 08:02:14,988 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 08:02:14,990 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 08:02:14,990 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 08:02:14,991 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 08:02:14,991 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 08:02:14,991 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 08:02:14,991 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 08:02:14,992 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 08:02:14,996 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 08:02:14,996 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 08:02:14,996 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 08:02:14,997 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 08:02:14,997 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 08:02:14,997 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 08:02:14,998 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 08:02:14,998 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 08:02:14,998 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 08:02:14,998 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 08:02:14,999 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 08:02:14,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:02:14,999 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 08:02:14,999 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 08:02:15,000 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 08:02:15,000 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 08:02:15,000 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 08:02:15,000 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 08:02:15,001 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 08:02:15,001 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 08:02:15,003 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 08:02:15,003 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2024-11-12 08:02:15,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 08:02:15,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 08:02:15,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 08:02:15,293 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 08:02:15,293 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 08:02:15,295 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longer-2.i [2024-11-12 08:02:16,761 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 08:02:16,991 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 08:02:16,992 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i [2024-11-12 08:02:17,010 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a8633f11/f76a984bf04d42ec912eedec18fd3a2c/FLAGd6a63b686 [2024-11-12 08:02:17,024 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a8633f11/f76a984bf04d42ec912eedec18fd3a2c [2024-11-12 08:02:17,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 08:02:17,028 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 08:02:17,032 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 08:02:17,033 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 08:02:17,037 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 08:02:17,040 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:17,041 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ec42b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17, skipping insertion in model container [2024-11-12 08:02:17,041 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:17,088 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 08:02:17,552 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2024-11-12 08:02:17,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:02:17,621 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 08:02:17,677 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2024-11-12 08:02:17,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:02:17,798 INFO L204 MainTranslator]: Completed translation [2024-11-12 08:02:17,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17 WrapperNode [2024-11-12 08:02:17,799 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 08:02:17,801 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 08:02:17,801 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 08:02:17,802 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 08:02:17,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:17,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:17,941 INFO L138 Inliner]: procedures = 277, calls = 430, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 545 [2024-11-12 08:02:17,946 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 08:02:17,946 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 08:02:17,946 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 08:02:17,946 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 08:02:17,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:17,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:17,988 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:18,021 INFO L175 MemorySlicer]: Split 409 memory accesses to 3 slices as follows [2, 5, 402]. 98 percent of accesses are in the largest equivalence class. The 407 initializations are split as follows [2, 5, 400]. The 1 writes are split as follows [0, 0, 1]. [2024-11-12 08:02:18,021 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:18,022 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:18,039 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:18,042 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:18,045 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:18,047 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:18,052 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 08:02:18,052 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 08:02:18,053 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 08:02:18,053 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 08:02:18,054 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (1/1) ... [2024-11-12 08:02:18,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:02:18,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:02:18,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 08:02:18,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 08:02:18,138 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-12 08:02:18,138 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-12 08:02:18,138 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-12 08:02:18,138 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-12 08:02:18,139 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-12 08:02:18,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 08:02:18,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 08:02:18,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 08:02:18,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 08:02:18,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 08:02:18,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 08:02:18,140 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-12 08:02:18,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 08:02:18,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 08:02:18,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 08:02:18,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 08:02:18,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 08:02:18,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 08:02:18,144 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 08:02:18,276 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 08:02:18,279 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 08:02:19,098 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 08:02:19,098 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 08:02:24,378 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 08:02:24,378 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-12 08:02:24,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:02:24 BoogieIcfgContainer [2024-11-12 08:02:24,379 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 08:02:24,381 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 08:02:24,381 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 08:02:24,385 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 08:02:24,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:02:17" (1/3) ... [2024-11-12 08:02:24,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd01951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:02:24, skipping insertion in model container [2024-11-12 08:02:24,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:02:17" (2/3) ... [2024-11-12 08:02:24,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd01951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:02:24, skipping insertion in model container [2024-11-12 08:02:24,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:02:24" (3/3) ... [2024-11-12 08:02:24,388 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2024-11-12 08:02:24,407 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 08:02:24,407 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-12 08:02:24,407 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 08:02:24,495 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 08:02:24,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2024-11-12 08:02:24,597 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-11-12 08:02:24,597 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:02:24,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 61 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2024-11-12 08:02:24,602 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2024-11-12 08:02:24,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2024-11-12 08:02:24,620 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:02:24,627 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;@702f497f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:02:24,627 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-12 08:02:24,671 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:02:24,672 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-11-12 08:02:24,672 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 08:02:24,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:24,673 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:02:24,674 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-12 08:02:24,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:24,679 INFO L85 PathProgramCache]: Analyzing trace with hash -998558077, now seen corresponding path program 1 times [2024-11-12 08:02:24,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:24,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499765506] [2024-11-12 08:02:24,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:24,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:25,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:25,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499765506] [2024-11-12 08:02:25,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499765506] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:02:25,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:02:25,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:02:25,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935076167] [2024-11-12 08:02:25,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:02:25,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:02:25,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:02:25,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 08:02:25,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-11-12 08:02:25,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-11-12 08:02:25,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:25,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-11-12 08:02:25,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:25,813 INFO L124 PetriNetUnfolderBase]: 307/576 cut-off events. [2024-11-12 08:02:25,813 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-12 08:02:25,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 576 events. 307/576 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2564 event pairs, 53 based on Foata normal form. 43/582 useless extension candidates. Maximal degree in co-relation 1055. Up to 358 conditions per place. [2024-11-12 08:02:25,826 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2024-11-12 08:02:25,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 214 flow [2024-11-12 08:02:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 08:02:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 08:02:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-12 08:02:25,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2024-11-12 08:02:25,843 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 4 states and 83 transitions. [2024-11-12 08:02:25,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 214 flow [2024-11-12 08:02:25,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 52 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 08:02:25,854 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2024-11-12 08:02:25,856 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, 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=4, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-11-12 08:02:25,862 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2024-11-12 08:02:25,863 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2024-11-12 08:02:25,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-11-12 08:02:25,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:25,864 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:02:25,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 08:02:25,865 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-12 08:02:25,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:25,866 INFO L85 PathProgramCache]: Analyzing trace with hash -739082850, now seen corresponding path program 1 times [2024-11-12 08:02:25,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:25,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766200803] [2024-11-12 08:02:25,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:25,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:26,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:26,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766200803] [2024-11-12 08:02:26,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766200803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:02:26,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396005577] [2024-11-12 08:02:26,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:26,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:02:26,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:02:26,472 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:02:26,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 08:02:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:26,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 08:02:26,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:02:26,957 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 8 treesize of output 1 [2024-11-12 08:02:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:27,064 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:02:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:27,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396005577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:02:27,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:02:27,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-12 08:02:27,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300348304] [2024-11-12 08:02:27,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:02:27,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 08:02:27,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:27,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 08:02:27,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-12 08:02:27,139 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-12 08:02:27,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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) [2024-11-12 08:02:27,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:27,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-12 08:02:27,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:27,729 INFO L124 PetriNetUnfolderBase]: 1257/2340 cut-off events. [2024-11-12 08:02:27,729 INFO L125 PetriNetUnfolderBase]: For 301/303 co-relation queries the response was YES. [2024-11-12 08:02:27,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4928 conditions, 2340 events. 1257/2340 cut-off events. For 301/303 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12471 event pairs, 153 based on Foata normal form. 49/2288 useless extension candidates. Maximal degree in co-relation 4364. Up to 365 conditions per place. [2024-11-12 08:02:27,746 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 163 selfloop transitions, 32 changer transitions 4/204 dead transitions. [2024-11-12 08:02:27,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 204 transitions, 900 flow [2024-11-12 08:02:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-12 08:02:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-12 08:02:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 313 transitions. [2024-11-12 08:02:27,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6137254901960785 [2024-11-12 08:02:27,750 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 15 states and 313 transitions. [2024-11-12 08:02:27,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 204 transitions, 900 flow [2024-11-12 08:02:27,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 204 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:02:27,756 INFO L231 Difference]: Finished difference. Result has 54 places, 66 transitions, 329 flow [2024-11-12 08:02:27,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=329, PETRI_PLACES=54, PETRI_TRANSITIONS=66} [2024-11-12 08:02:27,757 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2024-11-12 08:02:27,757 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 66 transitions, 329 flow [2024-11-12 08:02:27,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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) [2024-11-12 08:02:27,758 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:27,758 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:02:27,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 08:02:27,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:02:27,963 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-12 08:02:27,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:27,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1416957971, now seen corresponding path program 1 times [2024-11-12 08:02:27,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:27,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093946076] [2024-11-12 08:02:27,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:27,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:28,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:28,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093946076] [2024-11-12 08:02:28,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093946076] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:02:28,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:02:28,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:02:28,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673751800] [2024-11-12 08:02:28,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:02:28,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:02:28,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:28,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:02:28,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:02:28,236 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-11-12 08:02:28,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 66 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-11-12 08:02:28,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:28,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-11-12 08:02:28,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:28,450 INFO L124 PetriNetUnfolderBase]: 669/1355 cut-off events. [2024-11-12 08:02:28,450 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2024-11-12 08:02:28,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3066 conditions, 1355 events. 669/1355 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6877 event pairs, 231 based on Foata normal form. 66/1406 useless extension candidates. Maximal degree in co-relation 2918. Up to 634 conditions per place. [2024-11-12 08:02:28,461 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 43 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2024-11-12 08:02:28,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 339 flow [2024-11-12 08:02:28,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:02:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:02:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-11-12 08:02:28,463 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2024-11-12 08:02:28,463 INFO L175 Difference]: Start difference. First operand has 54 places, 66 transitions, 329 flow. Second operand 3 states and 58 transitions. [2024-11-12 08:02:28,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 339 flow [2024-11-12 08:02:28,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 307 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-11-12 08:02:28,477 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 198 flow [2024-11-12 08:02:28,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-11-12 08:02:28,478 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2024-11-12 08:02:28,479 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 198 flow [2024-11-12 08:02:28,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-11-12 08:02:28,480 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:28,480 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:02:28,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 08:02:28,480 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-12 08:02:28,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:28,481 INFO L85 PathProgramCache]: Analyzing trace with hash -791385794, now seen corresponding path program 1 times [2024-11-12 08:02:28,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:28,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546498443] [2024-11-12 08:02:28,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:28,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:29,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:29,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546498443] [2024-11-12 08:02:29,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546498443] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:02:29,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:02:29,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 08:02:29,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047760914] [2024-11-12 08:02:29,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:02:29,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:02:29,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:29,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:02:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:02:29,705 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-11-12 08:02:29,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2024-11-12 08:02:29,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:29,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-11-12 08:02:29,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:29,967 INFO L124 PetriNetUnfolderBase]: 840/1700 cut-off events. [2024-11-12 08:02:29,968 INFO L125 PetriNetUnfolderBase]: For 579/579 co-relation queries the response was YES. [2024-11-12 08:02:29,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3884 conditions, 1700 events. 840/1700 cut-off events. For 579/579 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8915 event pairs, 260 based on Foata normal form. 0/1681 useless extension candidates. Maximal degree in co-relation 3504. Up to 971 conditions per place. [2024-11-12 08:02:29,978 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 61 selfloop transitions, 7 changer transitions 4/84 dead transitions. [2024-11-12 08:02:29,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 451 flow [2024-11-12 08:02:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:02:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:02:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-11-12 08:02:29,979 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5705882352941176 [2024-11-12 08:02:29,980 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 198 flow. Second operand 5 states and 97 transitions. [2024-11-12 08:02:29,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 451 flow [2024-11-12 08:02:29,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 08:02:29,985 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 254 flow [2024-11-12 08:02:29,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-11-12 08:02:29,986 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2024-11-12 08:02:29,986 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 254 flow [2024-11-12 08:02:29,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2024-11-12 08:02:29,987 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:29,987 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:02:29,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 08:02:29,987 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-12 08:02:29,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:29,988 INFO L85 PathProgramCache]: Analyzing trace with hash 803150271, now seen corresponding path program 1 times [2024-11-12 08:02:29,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:29,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935588682] [2024-11-12 08:02:29,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:29,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:30,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:30,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935588682] [2024-11-12 08:02:30,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935588682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:02:30,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138270850] [2024-11-12 08:02:30,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:30,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:02:30,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:02:30,986 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:02:30,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 08:02:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:31,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-12 08:02:31,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:02:31,255 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 8 treesize of output 1 [2024-11-12 08:02:31,326 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 25 treesize of output 1 [2024-11-12 08:02:31,409 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 80 treesize of output 32 [2024-11-12 08:02:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:31,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:02:31,827 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 9 treesize of output 1 [2024-11-12 08:02:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:31,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138270850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:02:31,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:02:31,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-12 08:02:31,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773159959] [2024-11-12 08:02:31,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:02:31,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 08:02:31,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:31,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 08:02:31,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-12 08:02:31,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-12 08:02:31,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 254 flow. Second operand has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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) [2024-11-12 08:02:31,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:31,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-12 08:02:31,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:33,357 INFO L124 PetriNetUnfolderBase]: 1747/3464 cut-off events. [2024-11-12 08:02:33,358 INFO L125 PetriNetUnfolderBase]: For 1581/1581 co-relation queries the response was YES. [2024-11-12 08:02:33,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 3464 events. 1747/3464 cut-off events. For 1581/1581 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 18903 event pairs, 341 based on Foata normal form. 14/3413 useless extension candidates. Maximal degree in co-relation 6810. Up to 566 conditions per place. [2024-11-12 08:02:33,388 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 201 selfloop transitions, 52 changer transitions 18/276 dead transitions. [2024-11-12 08:02:33,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 276 transitions, 1488 flow [2024-11-12 08:02:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-12 08:02:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-12 08:02:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 413 transitions. [2024-11-12 08:02:33,392 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5521390374331551 [2024-11-12 08:02:33,392 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 254 flow. Second operand 22 states and 413 transitions. [2024-11-12 08:02:33,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 276 transitions, 1488 flow [2024-11-12 08:02:33,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 276 transitions, 1480 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-12 08:02:33,407 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 542 flow [2024-11-12 08:02:33,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=542, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2024-11-12 08:02:33,409 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 49 predicate places. [2024-11-12 08:02:33,410 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 542 flow [2024-11-12 08:02:33,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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) [2024-11-12 08:02:33,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:33,411 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:02:33,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 08:02:33,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:02:33,616 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-12 08:02:33,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:33,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1837970026, now seen corresponding path program 1 times [2024-11-12 08:02:33,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:33,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526518730] [2024-11-12 08:02:33,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:33,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:34,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:34,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526518730] [2024-11-12 08:02:34,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526518730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:02:34,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932932651] [2024-11-12 08:02:34,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:34,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:02:34,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:02:34,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:02:34,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 08:02:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:34,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 08:02:34,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:02:34,407 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 8 treesize of output 1 [2024-11-12 08:02:34,471 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 8 treesize of output 1 [2024-11-12 08:02:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:34,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:02:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:02:34,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932932651] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 08:02:34,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 08:02:34,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2024-11-12 08:02:34,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84864688] [2024-11-12 08:02:34,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:02:34,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:02:34,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:02:34,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-12 08:02:34,749 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-12 08:02:34,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 542 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2024-11-12 08:02:34,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:34,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-12 08:02:34,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:35,606 INFO L124 PetriNetUnfolderBase]: 2062/4114 cut-off events. [2024-11-12 08:02:35,606 INFO L125 PetriNetUnfolderBase]: For 3655/3655 co-relation queries the response was YES. [2024-11-12 08:02:35,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9905 conditions, 4114 events. 2062/4114 cut-off events. For 3655/3655 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 23875 event pairs, 425 based on Foata normal form. 24/4108 useless extension candidates. Maximal degree in co-relation 9267. Up to 1663 conditions per place. [2024-11-12 08:02:35,634 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 81 selfloop transitions, 50 changer transitions 2/138 dead transitions. [2024-11-12 08:02:35,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 138 transitions, 993 flow [2024-11-12 08:02:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 08:02:35,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 08:02:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-11-12 08:02:35,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2024-11-12 08:02:35,636 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 542 flow. Second operand 6 states and 112 transitions. [2024-11-12 08:02:35,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 138 transitions, 993 flow [2024-11-12 08:02:35,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 138 transitions, 969 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-11-12 08:02:35,655 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 751 flow [2024-11-12 08:02:35,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=751, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-11-12 08:02:35,657 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 56 predicate places. [2024-11-12 08:02:35,658 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 751 flow [2024-11-12 08:02:35,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2024-11-12 08:02:35,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:35,659 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:02:35,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 08:02:35,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:02:35,860 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-12 08:02:35,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1293758780, now seen corresponding path program 1 times [2024-11-12 08:02:35,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:35,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329535656] [2024-11-12 08:02:35,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:35,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:36,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:36,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329535656] [2024-11-12 08:02:36,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329535656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:02:36,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881787039] [2024-11-12 08:02:36,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:36,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:02:36,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:02:36,977 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:02:36,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 08:02:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:37,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 08:02:37,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:02:37,257 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 [2024-11-12 08:02:37,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 19 [2024-11-12 08:02:37,552 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 56 treesize of output 32 [2024-11-12 08:02:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:37,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:02:38,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:02:38,250 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 1 case distinctions, treesize of input 18 treesize of output 14 [2024-11-12 08:02:38,287 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-11-12 08:02:38,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 65 [2024-11-12 08:02:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:38,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881787039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:02:38,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:02:38,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-12 08:02:38,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502703179] [2024-11-12 08:02:38,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:02:38,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 08:02:38,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:38,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 08:02:38,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-11-12 08:02:38,370 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-12 08:02:38,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 751 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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) [2024-11-12 08:02:38,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:38,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-12 08:02:38,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:40,791 INFO L124 PetriNetUnfolderBase]: 4046/8044 cut-off events. [2024-11-12 08:02:40,791 INFO L125 PetriNetUnfolderBase]: For 11279/11279 co-relation queries the response was YES. [2024-11-12 08:02:40,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20343 conditions, 8044 events. 4046/8044 cut-off events. For 11279/11279 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 49069 event pairs, 950 based on Foata normal form. 56/8070 useless extension candidates. Maximal degree in co-relation 19195. Up to 1343 conditions per place. [2024-11-12 08:02:40,872 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 226 selfloop transitions, 123 changer transitions 36/390 dead transitions. [2024-11-12 08:02:40,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 390 transitions, 2865 flow [2024-11-12 08:02:40,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-12 08:02:40,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-12 08:02:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 450 transitions. [2024-11-12 08:02:40,874 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2024-11-12 08:02:40,875 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 751 flow. Second operand 25 states and 450 transitions. [2024-11-12 08:02:40,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 390 transitions, 2865 flow [2024-11-12 08:02:40,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 390 transitions, 2777 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-11-12 08:02:40,936 INFO L231 Difference]: Finished difference. Result has 122 places, 169 transitions, 1719 flow [2024-11-12 08:02:40,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1719, PETRI_PLACES=122, PETRI_TRANSITIONS=169} [2024-11-12 08:02:40,937 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2024-11-12 08:02:40,937 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 169 transitions, 1719 flow [2024-11-12 08:02:40,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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) [2024-11-12 08:02:40,938 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:40,938 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-12 08:02:40,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 08:02:41,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:02:41,139 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-12 08:02:41,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:41,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1648562543, now seen corresponding path program 2 times [2024-11-12 08:02:41,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:41,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296296490] [2024-11-12 08:02:41,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:41,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:41,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:41,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296296490] [2024-11-12 08:02:41,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296296490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:02:41,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564975296] [2024-11-12 08:02:41,751 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:02:41,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:02:41,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:02:41,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:02:41,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 08:02:41,971 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:02:41,971 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:02:41,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 08:02:41,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:02:41,994 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 8 treesize of output 1 [2024-11-12 08:02:42,065 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 8 treesize of output 1 [2024-11-12 08:02:42,109 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 8 treesize of output 1 [2024-11-12 08:02:42,152 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 8 treesize of output 1 [2024-11-12 08:02:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:42,210 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:02:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:42,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564975296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:02:42,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:02:42,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2024-11-12 08:02:42,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929061225] [2024-11-12 08:02:42,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:02:42,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 08:02:42,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:42,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 08:02:42,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2024-11-12 08:02:42,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-12 08:02:42,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 169 transitions, 1719 flow. Second operand has 22 states, 22 states have (on average 10.454545454545455) internal successors, (230), 22 states have internal predecessors, (230), 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) [2024-11-12 08:02:42,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:42,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-12 08:02:42,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:46,643 INFO L124 PetriNetUnfolderBase]: 10636/20779 cut-off events. [2024-11-12 08:02:46,644 INFO L125 PetriNetUnfolderBase]: For 53576/53576 co-relation queries the response was YES. [2024-11-12 08:02:46,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58360 conditions, 20779 events. 10636/20779 cut-off events. For 53576/53576 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 150811 event pairs, 1949 based on Foata normal form. 326/21103 useless extension candidates. Maximal degree in co-relation 56400. Up to 3450 conditions per place. [2024-11-12 08:02:46,854 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 565 selfloop transitions, 369 changer transitions 20/959 dead transitions. [2024-11-12 08:02:46,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 959 transitions, 8466 flow [2024-11-12 08:02:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-12 08:02:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-11-12 08:02:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1074 transitions. [2024-11-12 08:02:46,859 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5264705882352941 [2024-11-12 08:02:46,859 INFO L175 Difference]: Start difference. First operand has 122 places, 169 transitions, 1719 flow. Second operand 60 states and 1074 transitions. [2024-11-12 08:02:46,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 959 transitions, 8466 flow [2024-11-12 08:02:47,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 959 transitions, 8312 flow, removed 75 selfloop flow, removed 1 redundant places. [2024-11-12 08:02:47,225 INFO L231 Difference]: Finished difference. Result has 196 places, 444 transitions, 5607 flow [2024-11-12 08:02:47,225 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=5607, PETRI_PLACES=196, PETRI_TRANSITIONS=444} [2024-11-12 08:02:47,226 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 164 predicate places. [2024-11-12 08:02:47,230 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 444 transitions, 5607 flow [2024-11-12 08:02:47,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.454545454545455) internal successors, (230), 22 states have internal predecessors, (230), 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) [2024-11-12 08:02:47,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:02:47,231 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:02:47,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 08:02:47,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:02:47,432 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-12 08:02:47,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:02:47,432 INFO L85 PathProgramCache]: Analyzing trace with hash 385666834, now seen corresponding path program 2 times [2024-11-12 08:02:47,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:02:47,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158660757] [2024-11-12 08:02:47,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:02:47,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:02:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:02:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:49,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:02:49,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158660757] [2024-11-12 08:02:49,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158660757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:02:49,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582311592] [2024-11-12 08:02:49,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:02:49,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:02:49,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:02:49,176 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:02:49,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 08:02:49,473 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:02:49,473 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:02:49,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-12 08:02:49,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:02:49,528 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 [2024-11-12 08:02:49,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 14 [2024-11-12 08:02:49,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 14 [2024-11-12 08:02:49,881 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 56 treesize of output 32 [2024-11-12 08:02:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:49,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:02:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:02:50,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582311592] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:02:50,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:02:50,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2024-11-12 08:02:50,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435815787] [2024-11-12 08:02:50,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:02:50,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-12 08:02:50,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:02:50,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-12 08:02:50,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2024-11-12 08:02:50,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-12 08:02:50,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 444 transitions, 5607 flow. Second operand has 26 states, 26 states have (on average 10.807692307692308) internal successors, (281), 26 states have internal predecessors, (281), 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) [2024-11-12 08:02:50,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:02:50,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-12 08:02:50,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:02:59,443 INFO L124 PetriNetUnfolderBase]: 20951/40637 cut-off events. [2024-11-12 08:02:59,444 INFO L125 PetriNetUnfolderBase]: For 181092/181092 co-relation queries the response was YES. [2024-11-12 08:02:59,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124516 conditions, 40637 events. 20951/40637 cut-off events. For 181092/181092 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 312969 event pairs, 3484 based on Foata normal form. 441/41076 useless extension candidates. Maximal degree in co-relation 122347. Up to 6861 conditions per place. [2024-11-12 08:03:00,002 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 422 selfloop transitions, 692 changer transitions 20/1139 dead transitions. [2024-11-12 08:03:00,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1139 transitions, 14776 flow [2024-11-12 08:03:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-12 08:03:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-12 08:03:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 535 transitions. [2024-11-12 08:03:00,005 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5075901328273245 [2024-11-12 08:03:00,005 INFO L175 Difference]: Start difference. First operand has 196 places, 444 transitions, 5607 flow. Second operand 31 states and 535 transitions. [2024-11-12 08:03:00,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1139 transitions, 14776 flow [2024-11-12 08:03:01,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 1139 transitions, 13308 flow, removed 734 selfloop flow, removed 0 redundant places. [2024-11-12 08:03:01,383 INFO L231 Difference]: Finished difference. Result has 248 places, 839 transitions, 11911 flow [2024-11-12 08:03:01,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5031, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=11911, PETRI_PLACES=248, PETRI_TRANSITIONS=839} [2024-11-12 08:03:01,384 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 216 predicate places. [2024-11-12 08:03:01,384 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 839 transitions, 11911 flow [2024-11-12 08:03:01,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.807692307692308) internal successors, (281), 26 states have internal predecessors, (281), 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) [2024-11-12 08:03:01,385 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:03:01,385 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:03:01,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 08:03:01,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:03:01,586 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-12 08:03:01,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:03:01,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1310856568, now seen corresponding path program 1 times [2024-11-12 08:03:01,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:03:01,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634331672] [2024-11-12 08:03:01,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:01,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:03:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:03:02,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:03:02,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634331672] [2024-11-12 08:03:02,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634331672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:03:02,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258146060] [2024-11-12 08:03:02,336 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:03:02,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:03:02,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:03:02,359 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:03:02,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 08:03:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:03:02,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 08:03:02,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:03:02,688 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 8 treesize of output 1 [2024-11-12 08:03:02,733 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 8 treesize of output 1 [2024-11-12 08:03:02,787 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 8 treesize of output 1 [2024-11-12 08:03:02,942 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 8 treesize of output 1 [2024-11-12 08:03:03,000 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 8 treesize of output 1 [2024-11-12 08:03:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:03:03,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:03:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-12 08:03:03,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258146060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:03:03,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:03:03,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 22 [2024-11-12 08:03:03,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257662436] [2024-11-12 08:03:03,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:03:03,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 08:03:03,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:03:03,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 08:03:03,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2024-11-12 08:03:03,400 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-12 08:03:03,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 839 transitions, 11911 flow. Second operand has 22 states, 22 states have (on average 12.318181818181818) internal successors, (271), 22 states have internal predecessors, (271), 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) [2024-11-12 08:03:03,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:03:03,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-12 08:03:03,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:03:21,909 INFO L124 PetriNetUnfolderBase]: 36107/70214 cut-off events. [2024-11-12 08:03:21,910 INFO L125 PetriNetUnfolderBase]: For 484429/484429 co-relation queries the response was YES. [2024-11-12 08:03:23,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227716 conditions, 70214 events. 36107/70214 cut-off events. For 484429/484429 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 582921 event pairs, 4376 based on Foata normal form. 501/70701 useless extension candidates. Maximal degree in co-relation 225571. Up to 11778 conditions per place. [2024-11-12 08:03:23,624 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 704 selfloop transitions, 1364 changer transitions 30/2103 dead transitions. [2024-11-12 08:03:23,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 2103 transitions, 27944 flow [2024-11-12 08:03:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-12 08:03:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-11-12 08:03:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1142 transitions. [2024-11-12 08:03:23,632 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5167420814479639 [2024-11-12 08:03:23,633 INFO L175 Difference]: Start difference. First operand has 248 places, 839 transitions, 11911 flow. Second operand 65 states and 1142 transitions. [2024-11-12 08:03:23,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 2103 transitions, 27944 flow