./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f 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/weaver/popl20-bad-threaded-sum-2.wvr.c -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 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:31:34,618 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:31:34,689 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:31:34,694 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:31:34,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:31:34,723 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:31:34,724 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:31:34,724 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:31:34,725 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:31:34,725 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:31:34,726 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:31:34,726 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:31:34,727 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:31:34,730 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:31:34,730 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:31:34,730 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:31:34,731 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:31:34,731 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:31:34,731 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:31:34,732 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:31:34,732 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:31:34,733 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:31:34,733 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:31:34,733 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:31:34,734 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:31:34,734 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:31:34,735 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:31:34,735 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:31:34,735 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:31:34,735 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:31:34,736 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:31:34,736 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:31:34,736 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:31:34,737 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:31:34,737 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:31:34,737 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:31:34,737 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:31:34,738 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:31:34,738 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:31:34,739 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:31:34,740 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:31:34,740 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:31:34,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2024-11-10 10:31:34,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:31:35,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:31:35,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:31:35,033 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:31:35,033 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:31:35,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-11-10 10:31:36,490 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:31:36,671 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:31:36,672 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-11-10 10:31:36,680 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebd45b73d/41f0b0ce9fdc47c99e4ed50b6eb9288e/FLAG87f63e490 [2024-11-10 10:31:37,046 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebd45b73d/41f0b0ce9fdc47c99e4ed50b6eb9288e [2024-11-10 10:31:37,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:31:37,050 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:31:37,051 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:31:37,051 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:31:37,055 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:31:37,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9fe30bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37, skipping insertion in model container [2024-11-10 10:31:37,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,075 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:31:37,369 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/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2024-11-10 10:31:37,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:31:37,378 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:31:37,397 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/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2024-11-10 10:31:37,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:31:37,414 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:31:37,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37 WrapperNode [2024-11-10 10:31:37,416 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:31:37,417 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:31:37,417 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:31:37,417 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:31:37,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,432 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,449 INFO L138 Inliner]: procedures = 20, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 48 [2024-11-10 10:31:37,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:31:37,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:31:37,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:31:37,450 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:31:37,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,465 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,485 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-10 10:31:37,486 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,486 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,491 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,494 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,495 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,496 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,502 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:31:37,503 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:31:37,503 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:31:37,503 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:31:37,504 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (1/1) ... [2024-11-10 10:31:37,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:31:37,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:31:37,540 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) [2024-11-10 10:31:37,547 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 [2024-11-10 10:31:37,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:31:37,595 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 10:31:37,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 10:31:37,595 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 10:31:37,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 10:31:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:31:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 10:31:37,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 10:31:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:31:37,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:31:37,599 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:31:37,710 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:31:37,712 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:31:37,910 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:31:37,911 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:31:38,051 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:31:38,051 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:31:38,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:31:38 BoogieIcfgContainer [2024-11-10 10:31:38,052 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:31:38,056 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:31:38,056 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:31:38,059 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:31:38,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:31:37" (1/3) ... [2024-11-10 10:31:38,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7769d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:31:38, skipping insertion in model container [2024-11-10 10:31:38,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:37" (2/3) ... [2024-11-10 10:31:38,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7769d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:31:38, skipping insertion in model container [2024-11-10 10:31:38,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:31:38" (3/3) ... [2024-11-10 10:31:38,064 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2024-11-10 10:31:38,078 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:31:38,079 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:31:38,079 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:31:38,140 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 10:31:38,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 31 transitions, 76 flow [2024-11-10 10:31:38,207 INFO L124 PetriNetUnfolderBase]: 4/29 cut-off events. [2024-11-10 10:31:38,207 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:31:38,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 4/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-10 10:31:38,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 31 transitions, 76 flow [2024-11-10 10:31:38,218 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 28 transitions, 68 flow [2024-11-10 10:31:38,228 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:31:38,234 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;@4f5f46c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:31:38,235 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:31:38,245 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:31:38,245 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-11-10 10:31:38,245 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:31:38,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:31:38,246 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:31:38,247 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:31:38,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:31:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash 52165991, now seen corresponding path program 1 times [2024-11-10 10:31:38,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:31:38,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641554840] [2024-11-10 10:31:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:31:38,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:31:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:31:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:38,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:31:38,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641554840] [2024-11-10 10:31:38,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641554840] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:31:38,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:31:38,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:31:38,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912105555] [2024-11-10 10:31:38,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:31:38,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:31:38,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:31:38,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:31:38,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:31:38,468 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-11-10 10:31:38,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 68 flow. Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2024-11-10 10:31:38,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:31:38,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-11-10 10:31:38,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:31:38,565 INFO L124 PetriNetUnfolderBase]: 74/151 cut-off events. [2024-11-10 10:31:38,566 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-10 10:31:38,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 151 events. 74/151 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 590 event pairs, 53 based on Foata normal form. 21/153 useless extension candidates. Maximal degree in co-relation 260. Up to 131 conditions per place. [2024-11-10 10:31:38,570 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 17 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2024-11-10 10:31:38,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 98 flow [2024-11-10 10:31:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:31:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:31:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 41 transitions. [2024-11-10 10:31:38,585 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2024-11-10 10:31:38,588 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 68 flow. Second operand 2 states and 41 transitions. [2024-11-10 10:31:38,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 98 flow [2024-11-10 10:31:38,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 10:31:38,594 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 56 flow [2024-11-10 10:31:38,596 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2024-11-10 10:31:38,599 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-11-10 10:31:38,601 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 56 flow [2024-11-10 10:31:38,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2024-11-10 10:31:38,601 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:31:38,601 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:31:38,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:31:38,602 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:31:38,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:31:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash 557729438, now seen corresponding path program 1 times [2024-11-10 10:31:38,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:31:38,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102259828] [2024-11-10 10:31:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:31:38,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:31:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:31:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:38,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:31:38,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102259828] [2024-11-10 10:31:38,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102259828] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:31:38,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:31:38,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:31:38,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857139995] [2024-11-10 10:31:38,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:31:38,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:31:38,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:31:38,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:31:38,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:31:38,975 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-11-10 10:31:38,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2024-11-10 10:31:38,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:31:38,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-11-10 10:31:38,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:31:39,139 INFO L124 PetriNetUnfolderBase]: 137/291 cut-off events. [2024-11-10 10:31:39,139 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:31:39,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 291 events. 137/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1240 event pairs, 11 based on Foata normal form. 16/300 useless extension candidates. Maximal degree in co-relation 536. Up to 163 conditions per place. [2024-11-10 10:31:39,145 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 36 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-11-10 10:31:39,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 50 transitions, 191 flow [2024-11-10 10:31:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:31:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:31:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-11-10 10:31:39,148 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6064516129032258 [2024-11-10 10:31:39,148 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 56 flow. Second operand 5 states and 94 transitions. [2024-11-10 10:31:39,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 50 transitions, 191 flow [2024-11-10 10:31:39,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 50 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:31:39,152 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 101 flow [2024-11-10 10:31:39,153 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-11-10 10:31:39,153 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-11-10 10:31:39,153 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 101 flow [2024-11-10 10:31:39,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2024-11-10 10:31:39,154 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:31:39,154 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:31:39,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:31:39,154 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:31:39,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:31:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1575135394, now seen corresponding path program 1 times [2024-11-10 10:31:39,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:31:39,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189952158] [2024-11-10 10:31:39,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:31:39,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:31:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:31:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:31:39,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:31:39,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189952158] [2024-11-10 10:31:39,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189952158] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:31:39,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:31:39,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:31:39,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991779304] [2024-11-10 10:31:39,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:31:39,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:31:39,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:31:39,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:31:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:31:39,413 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-11-10 10:31:39,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:31:39,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:31:39,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-11-10 10:31:39,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:31:39,531 INFO L124 PetriNetUnfolderBase]: 169/367 cut-off events. [2024-11-10 10:31:39,532 INFO L125 PetriNetUnfolderBase]: For 193/201 co-relation queries the response was YES. [2024-11-10 10:31:39,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 367 events. 169/367 cut-off events. For 193/201 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1726 event pairs, 17 based on Foata normal form. 13/374 useless extension candidates. Maximal degree in co-relation 859. Up to 178 conditions per place. [2024-11-10 10:31:39,539 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 37 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2024-11-10 10:31:39,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 48 transitions, 245 flow [2024-11-10 10:31:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:31:39,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:31:39,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-10 10:31:39,542 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5887096774193549 [2024-11-10 10:31:39,542 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 101 flow. Second operand 4 states and 73 transitions. [2024-11-10 10:31:39,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 48 transitions, 245 flow [2024-11-10 10:31:39,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 48 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:31:39,547 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 112 flow [2024-11-10 10:31:39,549 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-11-10 10:31:39,550 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-11-10 10:31:39,550 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 112 flow [2024-11-10 10:31:39,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:31:39,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:31:39,550 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:31:39,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:31:39,550 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:31:39,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:31:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash 373769913, now seen corresponding path program 1 times [2024-11-10 10:31:39,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:31:39,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973308851] [2024-11-10 10:31:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:31:39,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:31:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:31:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:39,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:31:39,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973308851] [2024-11-10 10:31:39,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973308851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:31:39,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:31:39,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:31:39,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406356603] [2024-11-10 10:31:39,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:31:39,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:31:39,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:31:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:31:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:31:39,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-11-10 10:31:39,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2024-11-10 10:31:39,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:31:39,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-11-10 10:31:39,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:31:39,879 INFO L124 PetriNetUnfolderBase]: 168/372 cut-off events. [2024-11-10 10:31:39,879 INFO L125 PetriNetUnfolderBase]: For 271/277 co-relation queries the response was YES. [2024-11-10 10:31:39,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 372 events. 168/372 cut-off events. For 271/277 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1742 event pairs, 29 based on Foata normal form. 20/385 useless extension candidates. Maximal degree in co-relation 912. Up to 129 conditions per place. [2024-11-10 10:31:39,887 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 35 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2024-11-10 10:31:39,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 261 flow [2024-11-10 10:31:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:31:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:31:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-11-10 10:31:39,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5741935483870968 [2024-11-10 10:31:39,889 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 112 flow. Second operand 5 states and 89 transitions. [2024-11-10 10:31:39,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 261 flow [2024-11-10 10:31:39,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 10:31:39,894 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 158 flow [2024-11-10 10:31:39,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-11-10 10:31:39,895 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-11-10 10:31:39,896 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 158 flow [2024-11-10 10:31:39,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2024-11-10 10:31:39,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:31:39,898 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:31:39,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 10:31:39,899 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:31:39,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:31:39,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1313463045, now seen corresponding path program 2 times [2024-11-10 10:31:39,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:31:39,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464928249] [2024-11-10 10:31:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:31:39,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:31:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:31:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:40,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:31:40,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464928249] [2024-11-10 10:31:40,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464928249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:31:40,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570989974] [2024-11-10 10:31:40,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:31:40,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:31:40,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:31:40,529 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) [2024-11-10 10:31:40,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:31:40,608 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:31:40,608 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:31:40,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-10 10:31:40,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:31:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:49,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:31:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:49,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570989974] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 10:31:49,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 10:31:49,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 18 [2024-11-10 10:31:49,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090481398] [2024-11-10 10:31:49,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:31:49,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:31:49,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:31:49,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:31:49,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=252, Unknown=2, NotChecked=0, Total=342 [2024-11-10 10:31:49,829 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-11-10 10:31:49,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 158 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 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) [2024-11-10 10:31:49,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:31:49,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-11-10 10:31:49,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:31:50,692 INFO L124 PetriNetUnfolderBase]: 757/1366 cut-off events. [2024-11-10 10:31:50,692 INFO L125 PetriNetUnfolderBase]: For 1376/1376 co-relation queries the response was YES. [2024-11-10 10:31:50,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3812 conditions, 1366 events. 757/1366 cut-off events. For 1376/1376 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7047 event pairs, 32 based on Foata normal form. 1/1366 useless extension candidates. Maximal degree in co-relation 3801. Up to 308 conditions per place. [2024-11-10 10:31:50,704 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 100 selfloop transitions, 42 changer transitions 14/161 dead transitions. [2024-11-10 10:31:50,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 161 transitions, 972 flow [2024-11-10 10:31:50,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 10:31:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-10 10:31:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 250 transitions. [2024-11-10 10:31:50,710 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5040322580645161 [2024-11-10 10:31:50,710 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 158 flow. Second operand 16 states and 250 transitions. [2024-11-10 10:31:50,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 161 transitions, 972 flow [2024-11-10 10:31:50,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 161 transitions, 958 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:31:50,723 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 529 flow [2024-11-10 10:31:50,723 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=529, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2024-11-10 10:31:50,725 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2024-11-10 10:31:50,726 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 529 flow [2024-11-10 10:31:50,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 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) [2024-11-10 10:31:50,727 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:31:50,727 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:31:50,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 10:31:50,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:31:50,929 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:31:50,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:31:50,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1345224073, now seen corresponding path program 1 times [2024-11-10 10:31:50,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:31:50,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676539301] [2024-11-10 10:31:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:31:50,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:31:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:31:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:51,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:31:51,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676539301] [2024-11-10 10:31:51,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676539301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:31:51,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050916055] [2024-11-10 10:31:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:31:51,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:31:51,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:31:51,812 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) [2024-11-10 10:31:51,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:31:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:31:51,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 10:31:51,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:31:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:52,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:31:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:53,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050916055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:31:53,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:31:53,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-10 10:31:53,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209195026] [2024-11-10 10:31:53,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:31:53,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 10:31:53,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:31:53,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 10:31:53,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2024-11-10 10:31:53,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-11-10 10:31:53,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 529 flow. Second operand has 23 states, 23 states have (on average 9.73913043478261) internal successors, (224), 23 states have internal predecessors, (224), 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) [2024-11-10 10:31:53,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:31:53,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-11-10 10:31:53,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:00,282 INFO L124 PetriNetUnfolderBase]: 2328/4241 cut-off events. [2024-11-10 10:32:00,282 INFO L125 PetriNetUnfolderBase]: For 17179/17179 co-relation queries the response was YES. [2024-11-10 10:32:00,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15763 conditions, 4241 events. 2328/4241 cut-off events. For 17179/17179 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 27615 event pairs, 65 based on Foata normal form. 12/4253 useless extension candidates. Maximal degree in co-relation 15742. Up to 777 conditions per place. [2024-11-10 10:32:00,324 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 241 selfloop transitions, 173 changer transitions 137/556 dead transitions. [2024-11-10 10:32:00,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 556 transitions, 4607 flow [2024-11-10 10:32:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-10 10:32:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-11-10 10:32:00,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 834 transitions. [2024-11-10 10:32:00,329 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4483870967741935 [2024-11-10 10:32:00,329 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 529 flow. Second operand 60 states and 834 transitions. [2024-11-10 10:32:00,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 556 transitions, 4607 flow [2024-11-10 10:32:00,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 556 transitions, 4306 flow, removed 146 selfloop flow, removed 3 redundant places. [2024-11-10 10:32:00,395 INFO L231 Difference]: Finished difference. Result has 161 places, 237 transitions, 2518 flow [2024-11-10 10:32:00,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=2518, PETRI_PLACES=161, PETRI_TRANSITIONS=237} [2024-11-10 10:32:00,396 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 130 predicate places. [2024-11-10 10:32:00,396 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 237 transitions, 2518 flow [2024-11-10 10:32:00,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.73913043478261) internal successors, (224), 23 states have internal predecessors, (224), 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) [2024-11-10 10:32:00,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:00,397 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:00,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 10:32:00,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-10 10:32:00,602 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:00,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash -233835330, now seen corresponding path program 3 times [2024-11-10 10:32:00,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:00,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841182083] [2024-11-10 10:32:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:00,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:00,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:00,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841182083] [2024-11-10 10:32:00,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841182083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:00,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:00,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:32:00,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766838742] [2024-11-10 10:32:00,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:00,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:32:00,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:00,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:32:00,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:32:00,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-11-10 10:32:00,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 237 transitions, 2518 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2024-11-10 10:32:00,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:00,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-11-10 10:32:00,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:01,615 INFO L124 PetriNetUnfolderBase]: 1731/3488 cut-off events. [2024-11-10 10:32:01,615 INFO L125 PetriNetUnfolderBase]: For 44140/44366 co-relation queries the response was YES. [2024-11-10 10:32:01,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15318 conditions, 3488 events. 1731/3488 cut-off events. For 44140/44366 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23806 event pairs, 44 based on Foata normal form. 68/3548 useless extension candidates. Maximal degree in co-relation 15260. Up to 723 conditions per place. [2024-11-10 10:32:01,659 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 263 selfloop transitions, 127 changer transitions 0/451 dead transitions. [2024-11-10 10:32:01,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 451 transitions, 5597 flow [2024-11-10 10:32:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 10:32:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 10:32:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-11-10 10:32:01,661 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5053763440860215 [2024-11-10 10:32:01,661 INFO L175 Difference]: Start difference. First operand has 161 places, 237 transitions, 2518 flow. Second operand 9 states and 141 transitions. [2024-11-10 10:32:01,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 451 transitions, 5597 flow [2024-11-10 10:32:01,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 451 transitions, 5253 flow, removed 165 selfloop flow, removed 13 redundant places. [2024-11-10 10:32:01,819 INFO L231 Difference]: Finished difference. Result has 143 places, 309 transitions, 3679 flow [2024-11-10 10:32:01,819 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2334, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3679, PETRI_PLACES=143, PETRI_TRANSITIONS=309} [2024-11-10 10:32:01,820 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 112 predicate places. [2024-11-10 10:32:01,820 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 309 transitions, 3679 flow [2024-11-10 10:32:01,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2024-11-10 10:32:01,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:01,821 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:01,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 10:32:01,822 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:01,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash -868000851, now seen corresponding path program 2 times [2024-11-10 10:32:01,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:01,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243565096] [2024-11-10 10:32:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:07,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:07,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243565096] [2024-11-10 10:32:07,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243565096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:07,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602478473] [2024-11-10 10:32:07,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:32:07,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:07,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:07,071 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) [2024-11-10 10:32:07,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:32:07,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:32:07,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:07,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 10:32:07,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:15,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:19,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602478473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:19,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:19,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2024-11-10 10:32:19,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82593293] [2024-11-10 10:32:19,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:19,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-10 10:32:19,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-10 10:32:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=517, Unknown=3, NotChecked=0, Total=650 [2024-11-10 10:32:21,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-10 10:32:22,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-10 10:32:22,939 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-11-10 10:32:22,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 309 transitions, 3679 flow. Second operand has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:22,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:22,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-11-10 10:32:22,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:38,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-10 10:32:42,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-10 10:32:46,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-10 10:32:47,868 INFO L124 PetriNetUnfolderBase]: 4526/8262 cut-off events. [2024-11-10 10:32:47,868 INFO L125 PetriNetUnfolderBase]: For 118675/118675 co-relation queries the response was YES. [2024-11-10 10:32:47,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42607 conditions, 8262 events. 4526/8262 cut-off events. For 118675/118675 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 59178 event pairs, 74 based on Foata normal form. 10/8272 useless extension candidates. Maximal degree in co-relation 42553. Up to 2430 conditions per place. [2024-11-10 10:32:47,938 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 552 selfloop transitions, 344 changer transitions 98/999 dead transitions. [2024-11-10 10:32:47,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 999 transitions, 12502 flow [2024-11-10 10:32:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-10 10:32:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-11-10 10:32:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 924 transitions. [2024-11-10 10:32:47,943 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-11-10 10:32:47,943 INFO L175 Difference]: Start difference. First operand has 143 places, 309 transitions, 3679 flow. Second operand 66 states and 924 transitions. [2024-11-10 10:32:47,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 999 transitions, 12502 flow [2024-11-10 10:32:48,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 999 transitions, 12443 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-11-10 10:32:48,443 INFO L231 Difference]: Finished difference. Result has 238 places, 589 transitions, 8625 flow [2024-11-10 10:32:48,444 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3660, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=8625, PETRI_PLACES=238, PETRI_TRANSITIONS=589} [2024-11-10 10:32:48,444 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 207 predicate places. [2024-11-10 10:32:48,444 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 589 transitions, 8625 flow [2024-11-10 10:32:48,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 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) [2024-11-10 10:32:48,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:48,445 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:48,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 10:32:48,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:48,648 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:48,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:48,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1012593361, now seen corresponding path program 3 times [2024-11-10 10:32:48,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:48,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263016479] [2024-11-10 10:32:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:48,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:49,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:49,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263016479] [2024-11-10 10:32:49,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263016479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:49,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311713102] [2024-11-10 10:32:49,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:32:49,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:49,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:49,910 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) [2024-11-10 10:32:49,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:32:49,998 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-10 10:32:49,999 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:50,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 10:32:50,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:51,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:55,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311713102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:55,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:55,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-10 10:32:55,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971347691] [2024-11-10 10:32:55,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:55,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 10:32:55,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:55,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 10:32:55,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2024-11-10 10:32:55,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-11-10 10:32:55,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 589 transitions, 8625 flow. Second operand has 22 states, 22 states have (on average 11.818181818181818) internal successors, (260), 22 states have internal predecessors, (260), 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) [2024-11-10 10:32:55,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:55,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-11-10 10:32:55,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:33:04,384 WARN L286 SmtUtils]: Spent 8.58s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)