./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-nonblocking-cntr-alt.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-nonblocking-cntr-alt.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 17:15:09,315 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:15:09,403 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:15:09,414 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:15:09,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:15:09,440 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:15:09,442 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:15:09,442 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:15:09,443 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:15:09,447 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:15:09,447 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:15:09,448 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:15:09,449 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:15:09,450 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:15:09,450 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:15:09,451 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:15:09,451 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:15:09,451 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:15:09,451 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:15:09,451 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:15:09,452 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:15:09,452 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:15:09,452 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:15:09,452 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:15:09,453 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:15:09,453 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:15:09,453 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:15:09,453 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:15:09,454 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:15:09,454 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:15:09,455 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:15:09,455 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:15:09,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:15:09,455 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:15:09,456 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:15:09,456 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:15:09,456 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:15:09,456 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:15:09,456 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:15:09,456 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:15:09,457 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:15:09,457 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:15:09,457 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:15:09,457 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:15:09,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:15:09,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:15:09,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:15:09,714 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:15:09,715 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:15:09,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-nonblocking-cntr-alt.wvr.yml/witness.yml [2024-01-31 17:15:09,905 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:15:09,906 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:15:09,907 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-01-31 17:15:10,895 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:15:11,028 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:15:11,029 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-01-31 17:15:11,036 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/018f51e87/29d91911ec444c60a25cde2b82bf650a/FLAG0b905225b [2024-01-31 17:15:11,050 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/018f51e87/29d91911ec444c60a25cde2b82bf650a [2024-01-31 17:15:11,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:15:11,052 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:15:11,054 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:15:11,054 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:15:11,057 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:15:11,058 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:15:09" (1/2) ... [2024-01-31 17:15:11,060 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db08528 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:15:11, skipping insertion in model container [2024-01-31 17:15:11,060 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:15:09" (1/2) ... [2024-01-31 17:15:11,062 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34a2540 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:15:11, skipping insertion in model container [2024-01-31 17:15:11,062 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:15:11" (2/2) ... [2024-01-31 17:15:11,062 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db08528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11, skipping insertion in model container [2024-01-31 17:15:11,063 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:15:11" (2/2) ... [2024-01-31 17:15:11,063 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:15:11,091 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:15:11,092 INFO L98 nessWitnessExtractor]: Location invariant after [L51-L51] (unsigned long )_argptr == 0UL [2024-01-31 17:15:11,109 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:15:11,254 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-01-31 17:15:11,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:15:11,265 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:15:11,278 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 17:15:11,286 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-01-31 17:15:11,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:15:11,302 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:15:11,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11 WrapperNode [2024-01-31 17:15:11,303 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:15:11,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:15:11,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:15:11,304 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:15:11,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,332 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2024-01-31 17:15:11,333 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:15:11,334 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:15:11,334 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:15:11,334 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:15:11,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,351 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,374 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-31 17:15:11,374 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,375 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,393 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,395 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,396 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,397 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,398 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:15:11,399 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:15:11,399 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:15:11,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:15:11,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:15:11,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:11,459 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) [2024-01-31 17:15:11,462 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 [2024-01-31 17:15:11,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:15:11,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:15:11,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:15:11,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:15:11,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:15:11,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:15:11,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:15:11,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:15:11,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:15:11,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:15:11,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:15:11,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:15:11,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:15:11,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:15:11,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:15:11,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:15:11,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:15:11,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:15:11,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:15:11,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:15:11,527 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 17:15:11,598 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:15:11,601 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:15:11,736 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:15:11,736 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:15:11,870 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:15:11,870 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 17:15:11,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:15:11 BoogieIcfgContainer [2024-01-31 17:15:11,871 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:15:11,872 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:15:11,872 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:15:11,875 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:15:11,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:15:09" (1/4) ... [2024-01-31 17:15:11,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ad45b5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:15:11, skipping insertion in model container [2024-01-31 17:15:11,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:15:11" (2/4) ... [2024-01-31 17:15:11,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ad45b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:15:11, skipping insertion in model container [2024-01-31 17:15:11,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (3/4) ... [2024-01-31 17:15:11,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ad45b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:15:11, skipping insertion in model container [2024-01-31 17:15:11,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:15:11" (4/4) ... [2024-01-31 17:15:11,877 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2024-01-31 17:15:11,890 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:15:11,890 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:15:11,890 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:15:11,931 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:15:11,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-01-31 17:15:11,997 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-01-31 17:15:11,999 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:15:12,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-01-31 17:15:12,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-01-31 17:15:12,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-01-31 17:15:12,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:15:12,022 INFO L357 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, mHoare=false, 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;@2a46df70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:15:12,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:15:12,039 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:15:12,039 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-01-31 17:15:12,039 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:15:12,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:12,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:12,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:12,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:12,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2041025963, now seen corresponding path program 1 times [2024-01-31 17:15:12,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:12,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970751509] [2024-01-31 17:15:12,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:12,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:12,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:12,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970751509] [2024-01-31 17:15:12,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970751509] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:15:12,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:15:12,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:15:12,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893070660] [2024-01-31 17:15:12,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:15:12,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:15:12,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:12,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:15:12,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:15:12,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-01-31 17:15:12,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-01-31 17:15:12,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:12,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-01-31 17:15:12,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:12,534 INFO L124 PetriNetUnfolderBase]: 65/136 cut-off events. [2024-01-31 17:15:12,534 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-31 17:15:12,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 136 events. 65/136 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 412 event pairs, 33 based on Foata normal form. 10/145 useless extension candidates. Maximal degree in co-relation 217. Up to 92 conditions per place. [2024-01-31 17:15:12,539 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-01-31 17:15:12,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 117 flow [2024-01-31 17:15:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:15:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:15:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-01-31 17:15:12,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-01-31 17:15:12,551 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 4 states and 45 transitions. [2024-01-31 17:15:12,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 117 flow [2024-01-31 17:15:12,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 27 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:15:12,554 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 56 flow [2024-01-31 17:15:12,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2024-01-31 17:15:12,558 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 0 predicate places. [2024-01-31 17:15:12,559 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 56 flow [2024-01-31 17:15:12,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-01-31 17:15:12,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:12,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:12,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:15:12,560 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:12,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:12,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1493584575, now seen corresponding path program 1 times [2024-01-31 17:15:12,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:12,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114800426] [2024-01-31 17:15:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:12,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:15:12,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:12,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114800426] [2024-01-31 17:15:12,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114800426] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:15:12,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:15:12,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:15:12,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311184277] [2024-01-31 17:15:12,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:15:12,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:15:12,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:12,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:15:12,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:15:12,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-01-31 17:15:12,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2024-01-31 17:15:12,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:12,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-01-31 17:15:12,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:12,742 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2024-01-31 17:15:12,742 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-01-31 17:15:12,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 181 events. 93/181 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 597 event pairs, 39 based on Foata normal form. 10/186 useless extension candidates. Maximal degree in co-relation 113. Up to 116 conditions per place. [2024-01-31 17:15:12,746 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-01-31 17:15:12,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 137 flow [2024-01-31 17:15:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:15:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:15:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-01-31 17:15:12,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-01-31 17:15:12,750 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 56 flow. Second operand 4 states and 45 transitions. [2024-01-31 17:15:12,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 137 flow [2024-01-31 17:15:12,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 29 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 17:15:12,753 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 66 flow [2024-01-31 17:15:12,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=66, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2024-01-31 17:15:12,755 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2024-01-31 17:15:12,755 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 66 flow [2024-01-31 17:15:12,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2024-01-31 17:15:12,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:12,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:12,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:15:12,759 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:12,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash -671721043, now seen corresponding path program 1 times [2024-01-31 17:15:12,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:12,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527853457] [2024-01-31 17:15:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:12,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:13,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:13,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527853457] [2024-01-31 17:15:13,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527853457] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:13,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901925572] [2024-01-31 17:15:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:13,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:13,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:13,079 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) [2024-01-31 17:15:13,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:15:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:13,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:15:13,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:13,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:13,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901925572] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:13,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:13,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:15:13,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489932423] [2024-01-31 17:15:13,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:13,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:15:13,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:13,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:15:13,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:15:13,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:13,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 66 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 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) [2024-01-31 17:15:13,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:13,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:13,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:14,592 INFO L124 PetriNetUnfolderBase]: 406/703 cut-off events. [2024-01-31 17:15:14,592 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2024-01-31 17:15:14,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 703 events. 406/703 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2838 event pairs, 26 based on Foata normal form. 14/717 useless extension candidates. Maximal degree in co-relation 595. Up to 232 conditions per place. [2024-01-31 17:15:14,597 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 78 selfloop transitions, 53 changer transitions 18/150 dead transitions. [2024-01-31 17:15:14,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 150 transitions, 736 flow [2024-01-31 17:15:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:15:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:15:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 222 transitions. [2024-01-31 17:15:14,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881118881118881 [2024-01-31 17:15:14,601 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 66 flow. Second operand 26 states and 222 transitions. [2024-01-31 17:15:14,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 150 transitions, 736 flow [2024-01-31 17:15:14,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 150 transitions, 724 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 17:15:14,604 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 506 flow [2024-01-31 17:15:14,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=506, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2024-01-31 17:15:14,604 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 42 predicate places. [2024-01-31 17:15:14,605 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 506 flow [2024-01-31 17:15:14,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 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) [2024-01-31 17:15:14,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:14,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:14,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:14,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:14,818 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:14,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:14,819 INFO L85 PathProgramCache]: Analyzing trace with hash 192009637, now seen corresponding path program 2 times [2024-01-31 17:15:14,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:14,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738918261] [2024-01-31 17:15:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:14,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:15,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:15,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738918261] [2024-01-31 17:15:15,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738918261] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:15,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447549506] [2024-01-31 17:15:15,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:15:15,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:15,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:15,129 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) [2024-01-31 17:15:15,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:15:15,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:15:15,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:15,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:15:15,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:15,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:15,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447549506] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:15,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:15,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:15:15,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058992777] [2024-01-31 17:15:15,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:15,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:15:15,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:15,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:15:15,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:15:15,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:15,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 506 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 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) [2024-01-31 17:15:15,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:15,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:15,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:16,500 INFO L124 PetriNetUnfolderBase]: 611/1090 cut-off events. [2024-01-31 17:15:16,500 INFO L125 PetriNetUnfolderBase]: For 2784/2784 co-relation queries the response was YES. [2024-01-31 17:15:16,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4494 conditions, 1090 events. 611/1090 cut-off events. For 2784/2784 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5162 event pairs, 41 based on Foata normal form. 2/1092 useless extension candidates. Maximal degree in co-relation 4448. Up to 313 conditions per place. [2024-01-31 17:15:16,508 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 111 selfloop transitions, 107 changer transitions 34/253 dead transitions. [2024-01-31 17:15:16,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 253 transitions, 2010 flow [2024-01-31 17:15:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 17:15:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 17:15:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 240 transitions. [2024-01-31 17:15:16,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-01-31 17:15:16,510 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 506 flow. Second operand 24 states and 240 transitions. [2024-01-31 17:15:16,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 253 transitions, 2010 flow [2024-01-31 17:15:16,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 253 transitions, 1988 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-01-31 17:15:16,526 INFO L231 Difference]: Finished difference. Result has 103 places, 146 transitions, 1433 flow [2024-01-31 17:15:16,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1433, PETRI_PLACES=103, PETRI_TRANSITIONS=146} [2024-01-31 17:15:16,527 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 79 predicate places. [2024-01-31 17:15:16,527 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 146 transitions, 1433 flow [2024-01-31 17:15:16,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 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) [2024-01-31 17:15:16,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:16,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:16,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:16,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-01-31 17:15:16,740 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:16,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:16,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1243778285, now seen corresponding path program 3 times [2024-01-31 17:15:16,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:16,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191943623] [2024-01-31 17:15:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:16,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:16,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:16,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191943623] [2024-01-31 17:15:16,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191943623] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:16,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263575631] [2024-01-31 17:15:16,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:15:16,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:16,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:16,928 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) [2024-01-31 17:15:16,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:15:16,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:15:16,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:16,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:15:16,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:17,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:17,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263575631] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:17,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:17,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:15:17,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049360472] [2024-01-31 17:15:17,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:17,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:15:17,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:17,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:15:17,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:15:17,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:17,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 146 transitions, 1433 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 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) [2024-01-31 17:15:17,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:17,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:17,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:18,341 INFO L124 PetriNetUnfolderBase]: 637/1146 cut-off events. [2024-01-31 17:15:18,341 INFO L125 PetriNetUnfolderBase]: For 6159/6159 co-relation queries the response was YES. [2024-01-31 17:15:18,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6155 conditions, 1146 events. 637/1146 cut-off events. For 6159/6159 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5596 event pairs, 31 based on Foata normal form. 2/1148 useless extension candidates. Maximal degree in co-relation 6082. Up to 325 conditions per place. [2024-01-31 17:15:18,352 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 112 selfloop transitions, 139 changer transitions 25/277 dead transitions. [2024-01-31 17:15:18,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 277 transitions, 2923 flow [2024-01-31 17:15:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:15:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:15:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 265 transitions. [2024-01-31 17:15:18,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301948051948052 [2024-01-31 17:15:18,355 INFO L175 Difference]: Start difference. First operand has 103 places, 146 transitions, 1433 flow. Second operand 28 states and 265 transitions. [2024-01-31 17:15:18,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 277 transitions, 2923 flow [2024-01-31 17:15:18,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 277 transitions, 2816 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-01-31 17:15:18,426 INFO L231 Difference]: Finished difference. Result has 135 places, 178 transitions, 2186 flow [2024-01-31 17:15:18,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2186, PETRI_PLACES=135, PETRI_TRANSITIONS=178} [2024-01-31 17:15:18,428 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 111 predicate places. [2024-01-31 17:15:18,428 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 178 transitions, 2186 flow [2024-01-31 17:15:18,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 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) [2024-01-31 17:15:18,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:18,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:18,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:18,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:18,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:18,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:18,642 INFO L85 PathProgramCache]: Analyzing trace with hash 83752113, now seen corresponding path program 4 times [2024-01-31 17:15:18,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:18,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999692427] [2024-01-31 17:15:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:18,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:18,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:18,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999692427] [2024-01-31 17:15:18,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999692427] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:18,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270517646] [2024-01-31 17:15:18,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:15:18,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:18,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:18,844 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) [2024-01-31 17:15:18,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:15:18,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:15:18,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:18,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:15:18,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:19,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:19,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270517646] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:19,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:19,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-01-31 17:15:19,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629413961] [2024-01-31 17:15:19,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:19,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:15:19,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:15:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:15:19,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:19,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 178 transitions, 2186 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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) [2024-01-31 17:15:19,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:19,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:19,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:20,589 INFO L124 PetriNetUnfolderBase]: 1045/1886 cut-off events. [2024-01-31 17:15:20,589 INFO L125 PetriNetUnfolderBase]: For 15578/15578 co-relation queries the response was YES. [2024-01-31 17:15:20,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11725 conditions, 1886 events. 1045/1886 cut-off events. For 15578/15578 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10272 event pairs, 38 based on Foata normal form. 4/1890 useless extension candidates. Maximal degree in co-relation 11608. Up to 553 conditions per place. [2024-01-31 17:15:20,605 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 195 selfloop transitions, 250 changer transitions 22/468 dead transitions. [2024-01-31 17:15:20,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 468 transitions, 6064 flow [2024-01-31 17:15:20,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-31 17:15:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-31 17:15:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 372 transitions. [2024-01-31 17:15:20,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43356643356643354 [2024-01-31 17:15:20,607 INFO L175 Difference]: Start difference. First operand has 135 places, 178 transitions, 2186 flow. Second operand 39 states and 372 transitions. [2024-01-31 17:15:20,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 468 transitions, 6064 flow [2024-01-31 17:15:20,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 468 transitions, 5584 flow, removed 105 selfloop flow, removed 15 redundant places. [2024-01-31 17:15:20,680 INFO L231 Difference]: Finished difference. Result has 173 places, 325 transitions, 4616 flow [2024-01-31 17:15:20,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4616, PETRI_PLACES=173, PETRI_TRANSITIONS=325} [2024-01-31 17:15:20,682 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 149 predicate places. [2024-01-31 17:15:20,682 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 325 transitions, 4616 flow [2024-01-31 17:15:20,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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) [2024-01-31 17:15:20,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:20,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:20,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:20,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:20,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:20,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash 536205237, now seen corresponding path program 5 times [2024-01-31 17:15:20,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:20,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930859730] [2024-01-31 17:15:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:20,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:21,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:21,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930859730] [2024-01-31 17:15:21,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930859730] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:21,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84917869] [2024-01-31 17:15:21,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:15:21,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:21,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:21,108 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:21,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:15:21,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:15:21,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:21,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:15:21,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:21,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:21,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84917869] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:21,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:21,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-01-31 17:15:21,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798794686] [2024-01-31 17:15:21,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:21,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:15:21,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:21,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:15:21,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:15:21,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:21,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 325 transitions, 4616 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 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) [2024-01-31 17:15:21,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:21,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:21,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:22,762 INFO L124 PetriNetUnfolderBase]: 1175/2091 cut-off events. [2024-01-31 17:15:22,763 INFO L125 PetriNetUnfolderBase]: For 22526/22526 co-relation queries the response was YES. [2024-01-31 17:15:22,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14619 conditions, 2091 events. 1175/2091 cut-off events. For 22526/22526 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11497 event pairs, 59 based on Foata normal form. 2/2093 useless extension candidates. Maximal degree in co-relation 14466. Up to 831 conditions per place. [2024-01-31 17:15:22,782 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 207 selfloop transitions, 256 changer transitions 29/493 dead transitions. [2024-01-31 17:15:22,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 493 transitions, 7452 flow [2024-01-31 17:15:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 17:15:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 17:15:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 313 transitions. [2024-01-31 17:15:22,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064935064935065 [2024-01-31 17:15:22,787 INFO L175 Difference]: Start difference. First operand has 173 places, 325 transitions, 4616 flow. Second operand 35 states and 313 transitions. [2024-01-31 17:15:22,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 493 transitions, 7452 flow [2024-01-31 17:15:23,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 493 transitions, 6463 flow, removed 393 selfloop flow, removed 14 redundant places. [2024-01-31 17:15:23,020 INFO L231 Difference]: Finished difference. Result has 204 places, 377 transitions, 5576 flow [2024-01-31 17:15:23,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3991, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5576, PETRI_PLACES=204, PETRI_TRANSITIONS=377} [2024-01-31 17:15:23,021 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 180 predicate places. [2024-01-31 17:15:23,022 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 377 transitions, 5576 flow [2024-01-31 17:15:23,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 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) [2024-01-31 17:15:23,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:23,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:23,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:23,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:23,238 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:23,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash -571579629, now seen corresponding path program 6 times [2024-01-31 17:15:23,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:23,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051581870] [2024-01-31 17:15:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:23,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:23,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:23,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051581870] [2024-01-31 17:15:23,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051581870] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:23,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125215458] [2024-01-31 17:15:23,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:15:23,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:23,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:23,408 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:23,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:15:23,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:15:23,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:23,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:15:23,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:23,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:23,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125215458] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:23,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:23,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:15:23,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733175716] [2024-01-31 17:15:23,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:23,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:15:23,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:23,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:15:23,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:15:23,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:23,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 377 transitions, 5576 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 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) [2024-01-31 17:15:23,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:23,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:23,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:24,987 INFO L124 PetriNetUnfolderBase]: 1299/2336 cut-off events. [2024-01-31 17:15:24,987 INFO L125 PetriNetUnfolderBase]: For 23118/23118 co-relation queries the response was YES. [2024-01-31 17:15:25,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16286 conditions, 2336 events. 1299/2336 cut-off events. For 23118/23118 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13381 event pairs, 56 based on Foata normal form. 14/2350 useless extension candidates. Maximal degree in co-relation 16124. Up to 1046 conditions per place. [2024-01-31 17:15:25,027 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 224 selfloop transitions, 276 changer transitions 35/536 dead transitions. [2024-01-31 17:15:25,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 536 transitions, 8472 flow [2024-01-31 17:15:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 17:15:25,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 17:15:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 214 transitions. [2024-01-31 17:15:25,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42292490118577075 [2024-01-31 17:15:25,029 INFO L175 Difference]: Start difference. First operand has 204 places, 377 transitions, 5576 flow. Second operand 23 states and 214 transitions. [2024-01-31 17:15:25,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 536 transitions, 8472 flow [2024-01-31 17:15:25,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 536 transitions, 8266 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-01-31 17:15:25,261 INFO L231 Difference]: Finished difference. Result has 222 places, 443 transitions, 7611 flow [2024-01-31 17:15:25,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5393, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7611, PETRI_PLACES=222, PETRI_TRANSITIONS=443} [2024-01-31 17:15:25,262 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 198 predicate places. [2024-01-31 17:15:25,263 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 443 transitions, 7611 flow [2024-01-31 17:15:25,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 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) [2024-01-31 17:15:25,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:25,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:25,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:25,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:25,479 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:25,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash 755950769, now seen corresponding path program 7 times [2024-01-31 17:15:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:25,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789294158] [2024-01-31 17:15:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:25,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:25,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:25,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789294158] [2024-01-31 17:15:25,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789294158] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:25,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867263407] [2024-01-31 17:15:25,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:15:25,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:25,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:25,659 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:25,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:15:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:25,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:15:25,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:25,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:26,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867263407] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:26,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:26,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:15:26,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306851140] [2024-01-31 17:15:26,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:26,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:15:26,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:26,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:15:26,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:15:26,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:26,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 443 transitions, 7611 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 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) [2024-01-31 17:15:26,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:26,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:26,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:27,486 INFO L124 PetriNetUnfolderBase]: 1352/2413 cut-off events. [2024-01-31 17:15:27,486 INFO L125 PetriNetUnfolderBase]: For 31477/31477 co-relation queries the response was YES. [2024-01-31 17:15:27,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18748 conditions, 2413 events. 1352/2413 cut-off events. For 31477/31477 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13720 event pairs, 42 based on Foata normal form. 2/2415 useless extension candidates. Maximal degree in co-relation 18577. Up to 1112 conditions per place. [2024-01-31 17:15:27,507 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 235 selfloop transitions, 335 changer transitions 24/595 dead transitions. [2024-01-31 17:15:27,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 595 transitions, 10754 flow [2024-01-31 17:15:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:15:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:15:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 229 transitions. [2024-01-31 17:15:27,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38552188552188554 [2024-01-31 17:15:27,509 INFO L175 Difference]: Start difference. First operand has 222 places, 443 transitions, 7611 flow. Second operand 27 states and 229 transitions. [2024-01-31 17:15:27,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 595 transitions, 10754 flow [2024-01-31 17:15:27,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 595 transitions, 10530 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-01-31 17:15:27,769 INFO L231 Difference]: Finished difference. Result has 249 places, 517 transitions, 10033 flow [2024-01-31 17:15:27,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7448, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10033, PETRI_PLACES=249, PETRI_TRANSITIONS=517} [2024-01-31 17:15:27,771 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 225 predicate places. [2024-01-31 17:15:27,771 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 517 transitions, 10033 flow [2024-01-31 17:15:27,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 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) [2024-01-31 17:15:27,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:27,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:27,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-31 17:15:27,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:27,987 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:27,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash 134879665, now seen corresponding path program 8 times [2024-01-31 17:15:27,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:27,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698962605] [2024-01-31 17:15:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:27,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:28,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:28,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698962605] [2024-01-31 17:15:28,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698962605] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:28,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697442241] [2024-01-31 17:15:28,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:15:28,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:28,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:28,199 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:28,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 17:15:28,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:15:28,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:28,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:15:28,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:28,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:28,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697442241] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:28,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:28,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:15:28,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355143759] [2024-01-31 17:15:28,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:28,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:15:28,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:15:28,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:15:28,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:28,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 517 transitions, 10033 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 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) [2024-01-31 17:15:28,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:28,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:28,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:29,668 INFO L124 PetriNetUnfolderBase]: 1333/2360 cut-off events. [2024-01-31 17:15:29,668 INFO L125 PetriNetUnfolderBase]: For 36947/36947 co-relation queries the response was YES. [2024-01-31 17:15:29,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20457 conditions, 2360 events. 1333/2360 cut-off events. For 36947/36947 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13117 event pairs, 42 based on Foata normal form. 7/2367 useless extension candidates. Maximal degree in co-relation 20307. Up to 1064 conditions per place. [2024-01-31 17:15:29,691 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 263 selfloop transitions, 313 changer transitions 31/608 dead transitions. [2024-01-31 17:15:29,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 608 transitions, 12327 flow [2024-01-31 17:15:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 17:15:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 17:15:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 200 transitions. [2024-01-31 17:15:29,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-01-31 17:15:29,693 INFO L175 Difference]: Start difference. First operand has 249 places, 517 transitions, 10033 flow. Second operand 21 states and 200 transitions. [2024-01-31 17:15:29,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 608 transitions, 12327 flow [2024-01-31 17:15:30,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 608 transitions, 12079 flow, removed 102 selfloop flow, removed 9 redundant places. [2024-01-31 17:15:30,050 INFO L231 Difference]: Finished difference. Result has 266 places, 530 transitions, 11433 flow [2024-01-31 17:15:30,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9788, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11433, PETRI_PLACES=266, PETRI_TRANSITIONS=530} [2024-01-31 17:15:30,051 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 242 predicate places. [2024-01-31 17:15:30,052 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 530 transitions, 11433 flow [2024-01-31 17:15:30,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 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) [2024-01-31 17:15:30,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:30,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:30,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-31 17:15:30,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-31 17:15:30,263 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:30,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:30,263 INFO L85 PathProgramCache]: Analyzing trace with hash 805518513, now seen corresponding path program 9 times [2024-01-31 17:15:30,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:30,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572160178] [2024-01-31 17:15:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:30,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:30,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:30,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572160178] [2024-01-31 17:15:30,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572160178] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:30,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075793887] [2024-01-31 17:15:30,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:15:30,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:30,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:30,429 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:30,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 17:15:30,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:15:30,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:30,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:15:30,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:30,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:30,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075793887] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:30,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:30,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:15:30,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53053749] [2024-01-31 17:15:30,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:30,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:15:30,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:15:30,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:15:30,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:30,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 530 transitions, 11433 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 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) [2024-01-31 17:15:30,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:30,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:30,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:32,129 INFO L124 PetriNetUnfolderBase]: 1348/2391 cut-off events. [2024-01-31 17:15:32,130 INFO L125 PetriNetUnfolderBase]: For 44280/44280 co-relation queries the response was YES. [2024-01-31 17:15:32,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22358 conditions, 2391 events. 1348/2391 cut-off events. For 44280/44280 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13324 event pairs, 38 based on Foata normal form. 2/2393 useless extension candidates. Maximal degree in co-relation 22182. Up to 1088 conditions per place. [2024-01-31 17:15:32,155 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 265 selfloop transitions, 378 changer transitions 22/666 dead transitions. [2024-01-31 17:15:32,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 666 transitions, 14537 flow [2024-01-31 17:15:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-31 17:15:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-31 17:15:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 279 transitions. [2024-01-31 17:15:32,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384297520661157 [2024-01-31 17:15:32,162 INFO L175 Difference]: Start difference. First operand has 266 places, 530 transitions, 11433 flow. Second operand 33 states and 279 transitions. [2024-01-31 17:15:32,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 666 transitions, 14537 flow [2024-01-31 17:15:32,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 666 transitions, 14356 flow, removed 41 selfloop flow, removed 13 redundant places. [2024-01-31 17:15:32,559 INFO L231 Difference]: Finished difference. Result has 293 places, 586 transitions, 13923 flow [2024-01-31 17:15:32,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11296, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=13923, PETRI_PLACES=293, PETRI_TRANSITIONS=586} [2024-01-31 17:15:32,560 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 269 predicate places. [2024-01-31 17:15:32,560 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 586 transitions, 13923 flow [2024-01-31 17:15:32,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 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) [2024-01-31 17:15:32,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:32,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:32,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-31 17:15:32,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:32,771 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:32,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:32,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2055281171, now seen corresponding path program 10 times [2024-01-31 17:15:32,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:32,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554673858] [2024-01-31 17:15:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:32,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:32,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:32,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554673858] [2024-01-31 17:15:32,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554673858] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:32,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530388912] [2024-01-31 17:15:32,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:15:32,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:32,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:32,929 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:32,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 17:15:32,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:15:32,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:32,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:15:32,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:33,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:33,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530388912] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:33,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:33,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2024-01-31 17:15:33,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700177599] [2024-01-31 17:15:33,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:33,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:15:33,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:33,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:15:33,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:15:33,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:33,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 586 transitions, 13923 flow. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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) [2024-01-31 17:15:33,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:33,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:33,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:34,487 INFO L124 PetriNetUnfolderBase]: 1361/2410 cut-off events. [2024-01-31 17:15:34,488 INFO L125 PetriNetUnfolderBase]: For 52402/52402 co-relation queries the response was YES. [2024-01-31 17:15:34,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24563 conditions, 2410 events. 1361/2410 cut-off events. For 52402/52402 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13363 event pairs, 23 based on Foata normal form. 1/2411 useless extension candidates. Maximal degree in co-relation 24369. Up to 1124 conditions per place. [2024-01-31 17:15:34,513 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 213 selfloop transitions, 443 changer transitions 6/663 dead transitions. [2024-01-31 17:15:34,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 663 transitions, 16281 flow [2024-01-31 17:15:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 17:15:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 17:15:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 189 transitions. [2024-01-31 17:15:34,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37351778656126483 [2024-01-31 17:15:34,515 INFO L175 Difference]: Start difference. First operand has 293 places, 586 transitions, 13923 flow. Second operand 23 states and 189 transitions. [2024-01-31 17:15:34,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 663 transitions, 16281 flow [2024-01-31 17:15:34,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 663 transitions, 15889 flow, removed 83 selfloop flow, removed 14 redundant places. [2024-01-31 17:15:34,936 INFO L231 Difference]: Finished difference. Result has 299 places, 605 transitions, 15121 flow [2024-01-31 17:15:34,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=13543, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=15121, PETRI_PLACES=299, PETRI_TRANSITIONS=605} [2024-01-31 17:15:34,937 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 275 predicate places. [2024-01-31 17:15:34,937 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 605 transitions, 15121 flow [2024-01-31 17:15:34,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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) [2024-01-31 17:15:34,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:34,937 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:34,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:35,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-31 17:15:35,145 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:35,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:35,146 INFO L85 PathProgramCache]: Analyzing trace with hash 198407273, now seen corresponding path program 11 times [2024-01-31 17:15:35,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:35,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105779551] [2024-01-31 17:15:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:35,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:35,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:35,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105779551] [2024-01-31 17:15:35,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105779551] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:35,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061126768] [2024-01-31 17:15:35,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:15:35,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:35,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:35,346 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:35,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 17:15:35,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:15:35,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:35,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:15:35,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:35,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:36,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061126768] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:36,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:36,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:15:36,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805604596] [2024-01-31 17:15:36,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:36,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:15:36,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:36,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:15:36,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:15:36,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:36,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 605 transitions, 15121 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:15:36,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:36,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:36,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:39,294 INFO L124 PetriNetUnfolderBase]: 1917/3487 cut-off events. [2024-01-31 17:15:39,294 INFO L125 PetriNetUnfolderBase]: For 87627/87627 co-relation queries the response was YES. [2024-01-31 17:15:39,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37317 conditions, 3487 events. 1917/3487 cut-off events. For 87627/87627 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 21096 event pairs, 70 based on Foata normal form. 5/3492 useless extension candidates. Maximal degree in co-relation 37087. Up to 1109 conditions per place. [2024-01-31 17:15:39,328 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 426 selfloop transitions, 557 changer transitions 36/1020 dead transitions. [2024-01-31 17:15:39,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1020 transitions, 24736 flow [2024-01-31 17:15:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-01-31 17:15:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-01-31 17:15:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 579 transitions. [2024-01-31 17:15:39,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-01-31 17:15:39,333 INFO L175 Difference]: Start difference. First operand has 299 places, 605 transitions, 15121 flow. Second operand 63 states and 579 transitions. [2024-01-31 17:15:39,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1020 transitions, 24736 flow [2024-01-31 17:15:40,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1020 transitions, 24516 flow, removed 49 selfloop flow, removed 17 redundant places. [2024-01-31 17:15:40,036 INFO L231 Difference]: Finished difference. Result has 364 places, 781 transitions, 21986 flow [2024-01-31 17:15:40,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=14921, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=21986, PETRI_PLACES=364, PETRI_TRANSITIONS=781} [2024-01-31 17:15:40,037 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 340 predicate places. [2024-01-31 17:15:40,037 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 781 transitions, 21986 flow [2024-01-31 17:15:40,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:15:40,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:40,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:40,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:40,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-31 17:15:40,243 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:40,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:40,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1581178181, now seen corresponding path program 12 times [2024-01-31 17:15:40,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:40,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207918273] [2024-01-31 17:15:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:40,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:40,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:40,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207918273] [2024-01-31 17:15:40,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207918273] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:40,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140499408] [2024-01-31 17:15:40,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:15:40,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:40,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:40,518 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:40,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 17:15:40,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:15:40,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:40,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:15:40,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:40,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:41,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140499408] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:41,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:41,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:15:41,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534395469] [2024-01-31 17:15:41,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:41,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:15:41,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:41,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:15:41,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:15:41,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:41,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 781 transitions, 21986 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:15:41,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:41,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:41,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:46,549 INFO L124 PetriNetUnfolderBase]: 2449/4469 cut-off events. [2024-01-31 17:15:46,549 INFO L125 PetriNetUnfolderBase]: For 148498/148498 co-relation queries the response was YES. [2024-01-31 17:15:46,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53226 conditions, 4469 events. 2449/4469 cut-off events. For 148498/148498 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 28858 event pairs, 53 based on Foata normal form. 6/4475 useless extension candidates. Maximal degree in co-relation 53112. Up to 1391 conditions per place. [2024-01-31 17:15:46,602 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 443 selfloop transitions, 841 changer transitions 36/1321 dead transitions. [2024-01-31 17:15:46,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1321 transitions, 35642 flow [2024-01-31 17:15:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-01-31 17:15:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2024-01-31 17:15:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 929 transitions. [2024-01-31 17:15:46,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37369267900241354 [2024-01-31 17:15:46,605 INFO L175 Difference]: Start difference. First operand has 364 places, 781 transitions, 21986 flow. Second operand 113 states and 929 transitions. [2024-01-31 17:15:46,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1321 transitions, 35642 flow [2024-01-31 17:15:47,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 1321 transitions, 34946 flow, removed 238 selfloop flow, removed 12 redundant places. [2024-01-31 17:15:48,012 INFO L231 Difference]: Finished difference. Result has 480 places, 1047 transitions, 31838 flow [2024-01-31 17:15:48,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=21579, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=31838, PETRI_PLACES=480, PETRI_TRANSITIONS=1047} [2024-01-31 17:15:48,013 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 456 predicate places. [2024-01-31 17:15:48,013 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 1047 transitions, 31838 flow [2024-01-31 17:15:48,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:15:48,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:48,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:48,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-01-31 17:15:48,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 17:15:48,219 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:48,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:48,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1593145921, now seen corresponding path program 13 times [2024-01-31 17:15:48,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:48,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743849374] [2024-01-31 17:15:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:48,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:48,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:48,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743849374] [2024-01-31 17:15:48,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743849374] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:48,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688387854] [2024-01-31 17:15:48,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:15:48,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:48,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:48,497 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:48,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 17:15:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:48,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:15:48,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:48,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:49,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688387854] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:49,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:49,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:15:49,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349056853] [2024-01-31 17:15:49,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:49,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:15:49,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:49,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:15:49,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:15:49,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:49,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 1047 transitions, 31838 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:15:49,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:49,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:49,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:53,784 INFO L124 PetriNetUnfolderBase]: 2440/4462 cut-off events. [2024-01-31 17:15:53,785 INFO L125 PetriNetUnfolderBase]: For 169953/169953 co-relation queries the response was YES. [2024-01-31 17:15:53,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56518 conditions, 4462 events. 2440/4462 cut-off events. For 169953/169953 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 28822 event pairs, 59 based on Foata normal form. 5/4467 useless extension candidates. Maximal degree in co-relation 56017. Up to 1389 conditions per place. [2024-01-31 17:15:53,941 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 439 selfloop transitions, 805 changer transitions 33/1278 dead transitions. [2024-01-31 17:15:53,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1278 transitions, 37228 flow [2024-01-31 17:15:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-01-31 17:15:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2024-01-31 17:15:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 686 transitions. [2024-01-31 17:15:53,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3947065592635213 [2024-01-31 17:15:53,944 INFO L175 Difference]: Start difference. First operand has 480 places, 1047 transitions, 31838 flow. Second operand 79 states and 686 transitions. [2024-01-31 17:15:53,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1278 transitions, 37228 flow [2024-01-31 17:15:55,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1278 transitions, 35825 flow, removed 441 selfloop flow, removed 40 redundant places. [2024-01-31 17:15:55,737 INFO L231 Difference]: Finished difference. Result has 527 places, 1060 transitions, 33240 flow [2024-01-31 17:15:55,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=30553, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=791, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=33240, PETRI_PLACES=527, PETRI_TRANSITIONS=1060} [2024-01-31 17:15:55,739 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 503 predicate places. [2024-01-31 17:15:55,739 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 1060 transitions, 33240 flow [2024-01-31 17:15:55,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:15:55,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:55,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:55,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:55,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 17:15:55,951 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:55,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1112756615, now seen corresponding path program 14 times [2024-01-31 17:15:55,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:55,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698315096] [2024-01-31 17:15:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:55,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:56,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:56,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698315096] [2024-01-31 17:15:56,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698315096] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:56,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057563021] [2024-01-31 17:15:56,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:15:56,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:56,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:56,168 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:56,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 17:15:56,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:15:56,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:56,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:15:56,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:56,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:56,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057563021] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:56,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:56,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:15:56,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565010480] [2024-01-31 17:15:56,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:56,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:15:56,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:56,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:15:56,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:15:56,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:56,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 1060 transitions, 33240 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:15:56,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:56,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:56,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:01,591 INFO L124 PetriNetUnfolderBase]: 2956/5364 cut-off events. [2024-01-31 17:16:01,592 INFO L125 PetriNetUnfolderBase]: For 228715/228715 co-relation queries the response was YES. [2024-01-31 17:16:01,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70269 conditions, 5364 events. 2956/5364 cut-off events. For 228715/228715 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35876 event pairs, 109 based on Foata normal form. 5/5369 useless extension candidates. Maximal degree in co-relation 69728. Up to 1671 conditions per place. [2024-01-31 17:16:01,657 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 496 selfloop transitions, 1027 changer transitions 24/1548 dead transitions. [2024-01-31 17:16:01,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 1548 transitions, 48226 flow [2024-01-31 17:16:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-01-31 17:16:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-01-31 17:16:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 732 transitions. [2024-01-31 17:16:01,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386892177589852 [2024-01-31 17:16:01,660 INFO L175 Difference]: Start difference. First operand has 527 places, 1060 transitions, 33240 flow. Second operand 86 states and 732 transitions. [2024-01-31 17:16:01,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 1548 transitions, 48226 flow [2024-01-31 17:16:04,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1548 transitions, 47013 flow, removed 62 selfloop flow, removed 54 redundant places. [2024-01-31 17:16:04,570 INFO L231 Difference]: Finished difference. Result has 583 places, 1326 transitions, 44757 flow [2024-01-31 17:16:04,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=32250, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=44757, PETRI_PLACES=583, PETRI_TRANSITIONS=1326} [2024-01-31 17:16:04,572 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 559 predicate places. [2024-01-31 17:16:04,572 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 1326 transitions, 44757 flow [2024-01-31 17:16:04,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:16:04,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:04,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:04,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 17:16:04,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:04,785 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:16:04,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2057862727, now seen corresponding path program 15 times [2024-01-31 17:16:04,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:04,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818761900] [2024-01-31 17:16:04,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:04,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:04,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:04,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818761900] [2024-01-31 17:16:04,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818761900] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:04,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132819484] [2024-01-31 17:16:04,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:16:04,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:04,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:04,977 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:16:04,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 17:16:05,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:16:05,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:05,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:16:05,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:05,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:05,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132819484] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:05,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:05,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:16:05,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580433155] [2024-01-31 17:16:05,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:05,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:16:05,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:05,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:16:05,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:16:05,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:16:05,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 1326 transitions, 44757 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:16:05,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:05,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:16:05,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:11,052 INFO L124 PetriNetUnfolderBase]: 3385/6133 cut-off events. [2024-01-31 17:16:11,053 INFO L125 PetriNetUnfolderBase]: For 316910/316910 co-relation queries the response was YES. [2024-01-31 17:16:11,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85994 conditions, 6133 events. 3385/6133 cut-off events. For 316910/316910 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 42166 event pairs, 135 based on Foata normal form. 4/6137 useless extension candidates. Maximal degree in co-relation 85454. Up to 2710 conditions per place. [2024-01-31 17:16:11,139 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 644 selfloop transitions, 1009 changer transitions 32/1686 dead transitions. [2024-01-31 17:16:11,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 1686 transitions, 56688 flow [2024-01-31 17:16:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-01-31 17:16:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-01-31 17:16:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 586 transitions. [2024-01-31 17:16:11,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38051948051948054 [2024-01-31 17:16:11,141 INFO L175 Difference]: Start difference. First operand has 583 places, 1326 transitions, 44757 flow. Second operand 70 states and 586 transitions. [2024-01-31 17:16:11,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 1686 transitions, 56688 flow [2024-01-31 17:16:16,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 1686 transitions, 55831 flow, removed 245 selfloop flow, removed 19 redundant places. [2024-01-31 17:16:16,342 INFO L231 Difference]: Finished difference. Result has 664 places, 1508 transitions, 54562 flow [2024-01-31 17:16:16,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=43988, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=54562, PETRI_PLACES=664, PETRI_TRANSITIONS=1508} [2024-01-31 17:16:16,353 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 640 predicate places. [2024-01-31 17:16:16,353 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 1508 transitions, 54562 flow [2024-01-31 17:16:16,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:16:16,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:16,354 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:16,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 17:16:16,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 17:16:16,566 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:16:16,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:16,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1511198619, now seen corresponding path program 16 times [2024-01-31 17:16:16,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:16,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343737522] [2024-01-31 17:16:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:16,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:16,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:16,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343737522] [2024-01-31 17:16:16,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343737522] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:16,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936648832] [2024-01-31 17:16:16,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:16:16,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:16,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:16,746 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:16:16,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 17:16:16,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:16:16,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:16,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:16:16,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:17,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:17,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936648832] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:17,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:17,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:16:17,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445773638] [2024-01-31 17:16:17,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:17,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:16:17,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:17,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:16:17,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:16:17,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:16:17,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 1508 transitions, 54562 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:16:17,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:17,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:16:17,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:21,985 INFO L124 PetriNetUnfolderBase]: 3533/6410 cut-off events. [2024-01-31 17:16:21,986 INFO L125 PetriNetUnfolderBase]: For 372277/372277 co-relation queries the response was YES. [2024-01-31 17:16:22,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94422 conditions, 6410 events. 3533/6410 cut-off events. For 372277/372277 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 44587 event pairs, 166 based on Foata normal form. 7/6417 useless extension candidates. Maximal degree in co-relation 93859. Up to 3378 conditions per place. [2024-01-31 17:16:22,089 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 593 selfloop transitions, 1090 changer transitions 17/1701 dead transitions. [2024-01-31 17:16:22,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 1701 transitions, 62306 flow [2024-01-31 17:16:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-31 17:16:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-31 17:16:22,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 337 transitions. [2024-01-31 17:16:22,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3927738927738928 [2024-01-31 17:16:22,091 INFO L175 Difference]: Start difference. First operand has 664 places, 1508 transitions, 54562 flow. Second operand 39 states and 337 transitions. [2024-01-31 17:16:22,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 1701 transitions, 62306 flow [2024-01-31 17:16:28,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 1701 transitions, 62061 flow, removed 53 selfloop flow, removed 19 redundant places. [2024-01-31 17:16:28,789 INFO L231 Difference]: Finished difference. Result has 695 places, 1586 transitions, 61161 flow [2024-01-31 17:16:28,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=54349, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=61161, PETRI_PLACES=695, PETRI_TRANSITIONS=1586} [2024-01-31 17:16:28,791 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 671 predicate places. [2024-01-31 17:16:28,791 INFO L495 AbstractCegarLoop]: Abstraction has has 695 places, 1586 transitions, 61161 flow [2024-01-31 17:16:28,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:16:28,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:28,791 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:28,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 17:16:29,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 17:16:29,002 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:16:29,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:29,003 INFO L85 PathProgramCache]: Analyzing trace with hash -909574171, now seen corresponding path program 17 times [2024-01-31 17:16:29,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:29,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534392255] [2024-01-31 17:16:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:29,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:29,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:29,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534392255] [2024-01-31 17:16:29,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534392255] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:29,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118878609] [2024-01-31 17:16:29,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:16:29,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:29,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:29,213 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:16:29,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 17:16:29,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:16:29,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:29,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:16:29,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:29,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:30,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118878609] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:30,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:30,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:16:30,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833635913] [2024-01-31 17:16:30,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:30,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:16:30,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:30,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:16:30,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:16:30,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:16:30,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 695 places, 1586 transitions, 61161 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:16:30,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:30,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:16:30,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:36,970 INFO L124 PetriNetUnfolderBase]: 3845/6991 cut-off events. [2024-01-31 17:16:36,970 INFO L125 PetriNetUnfolderBase]: For 485942/485942 co-relation queries the response was YES. [2024-01-31 17:16:37,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110027 conditions, 6991 events. 3845/6991 cut-off events. For 485942/485942 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 49643 event pairs, 147 based on Foata normal form. 6/6997 useless extension candidates. Maximal degree in co-relation 109619. Up to 2774 conditions per place. [2024-01-31 17:16:37,127 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 649 selfloop transitions, 1271 changer transitions 24/1945 dead transitions. [2024-01-31 17:16:37,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 774 places, 1945 transitions, 73860 flow [2024-01-31 17:16:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-01-31 17:16:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2024-01-31 17:16:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 687 transitions. [2024-01-31 17:16:37,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.380820399113082 [2024-01-31 17:16:37,137 INFO L175 Difference]: Start difference. First operand has 695 places, 1586 transitions, 61161 flow. Second operand 82 states and 687 transitions. [2024-01-31 17:16:37,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 774 places, 1945 transitions, 73860 flow [2024-01-31 17:16:45,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 1945 transitions, 73607 flow, removed 70 selfloop flow, removed 10 redundant places. [2024-01-31 17:16:45,267 INFO L231 Difference]: Finished difference. Result has 789 places, 1736 transitions, 71826 flow [2024-01-31 17:16:45,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60936, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=71826, PETRI_PLACES=789, PETRI_TRANSITIONS=1736} [2024-01-31 17:16:45,269 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 765 predicate places. [2024-01-31 17:16:45,269 INFO L495 AbstractCegarLoop]: Abstraction has has 789 places, 1736 transitions, 71826 flow [2024-01-31 17:16:45,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:16:45,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:45,270 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:45,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 17:16:45,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:45,481 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:16:45,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:45,481 INFO L85 PathProgramCache]: Analyzing trace with hash -762407805, now seen corresponding path program 18 times [2024-01-31 17:16:45,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:45,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308660766] [2024-01-31 17:16:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:45,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:45,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:45,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308660766] [2024-01-31 17:16:45,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308660766] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:45,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338930992] [2024-01-31 17:16:45,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:16:45,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:45,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:45,662 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:16:45,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 17:16:45,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:16:45,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:45,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:16:45,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:46,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:46,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338930992] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:46,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:46,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:16:46,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148292958] [2024-01-31 17:16:46,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:46,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:16:46,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:46,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:16:46,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:16:46,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:16:46,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 789 places, 1736 transitions, 71826 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:16:46,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:46,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:16:46,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:54,187 INFO L124 PetriNetUnfolderBase]: 3870/7023 cut-off events. [2024-01-31 17:16:54,187 INFO L125 PetriNetUnfolderBase]: For 539051/539051 co-relation queries the response was YES. [2024-01-31 17:16:54,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117468 conditions, 7023 events. 3870/7023 cut-off events. For 539051/539051 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 49751 event pairs, 149 based on Foata normal form. 5/7028 useless extension candidates. Maximal degree in co-relation 117013. Up to 2781 conditions per place. [2024-01-31 17:16:54,318 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 673 selfloop transitions, 1253 changer transitions 34/1961 dead transitions. [2024-01-31 17:16:54,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 1961 transitions, 78823 flow [2024-01-31 17:16:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-01-31 17:16:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2024-01-31 17:16:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 771 transitions. [2024-01-31 17:16:54,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3612933458294283 [2024-01-31 17:16:54,348 INFO L175 Difference]: Start difference. First operand has 789 places, 1736 transitions, 71826 flow. Second operand 97 states and 771 transitions. [2024-01-31 17:16:54,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 1961 transitions, 78823 flow [2024-01-31 17:17:04,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 844 places, 1961 transitions, 77326 flow, removed 550 selfloop flow, removed 36 redundant places. [2024-01-31 17:17:05,058 INFO L231 Difference]: Finished difference. Result has 853 places, 1760 transitions, 74867 flow [2024-01-31 17:17:05,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=70437, PETRI_DIFFERENCE_MINUEND_PLACES=748, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=74867, PETRI_PLACES=853, PETRI_TRANSITIONS=1760} [2024-01-31 17:17:05,060 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 829 predicate places. [2024-01-31 17:17:05,060 INFO L495 AbstractCegarLoop]: Abstraction has has 853 places, 1760 transitions, 74867 flow [2024-01-31 17:17:05,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:17:05,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:05,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:05,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 17:17:05,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:05,272 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:05,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:05,272 INFO L85 PathProgramCache]: Analyzing trace with hash -195041315, now seen corresponding path program 19 times [2024-01-31 17:17:05,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:05,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174183445] [2024-01-31 17:17:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:05,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:05,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:05,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174183445] [2024-01-31 17:17:05,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174183445] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:05,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685697615] [2024-01-31 17:17:05,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:17:05,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:05,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:05,533 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:17:05,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 17:17:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:05,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:17:05,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:05,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:06,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685697615] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:06,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:06,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:17:06,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598642828] [2024-01-31 17:17:06,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:06,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:17:06,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:06,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:17:06,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:17:06,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:17:06,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 1760 transitions, 74867 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:17:06,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:06,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:17:06,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:13,070 INFO L124 PetriNetUnfolderBase]: 4013/7294 cut-off events. [2024-01-31 17:17:13,070 INFO L125 PetriNetUnfolderBase]: For 535399/535399 co-relation queries the response was YES. [2024-01-31 17:17:13,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122321 conditions, 7294 events. 4013/7294 cut-off events. For 535399/535399 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 52300 event pairs, 180 based on Foata normal form. 7/7301 useless extension candidates. Maximal degree in co-relation 121668. Up to 3733 conditions per place. [2024-01-31 17:17:13,193 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 727 selfloop transitions, 1249 changer transitions 23/2000 dead transitions. [2024-01-31 17:17:13,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 911 places, 2000 transitions, 83542 flow [2024-01-31 17:17:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-01-31 17:17:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-01-31 17:17:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 509 transitions. [2024-01-31 17:17:13,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3615056818181818 [2024-01-31 17:17:13,195 INFO L175 Difference]: Start difference. First operand has 853 places, 1760 transitions, 74867 flow. Second operand 64 states and 509 transitions. [2024-01-31 17:17:13,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 911 places, 2000 transitions, 83542 flow [2024-01-31 17:17:23,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 840 places, 2000 transitions, 82509 flow, removed 114 selfloop flow, removed 71 redundant places. [2024-01-31 17:17:23,762 INFO L231 Difference]: Finished difference. Result has 856 places, 1849 transitions, 81131 flow [2024-01-31 17:17:23,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=73877, PETRI_DIFFERENCE_MINUEND_PLACES=777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=81131, PETRI_PLACES=856, PETRI_TRANSITIONS=1849} [2024-01-31 17:17:23,764 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 832 predicate places. [2024-01-31 17:17:23,764 INFO L495 AbstractCegarLoop]: Abstraction has has 856 places, 1849 transitions, 81131 flow [2024-01-31 17:17:23,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:17:23,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:23,764 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:23,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-01-31 17:17:23,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:23,973 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:23,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:23,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1681172385, now seen corresponding path program 20 times [2024-01-31 17:17:23,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:23,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883258426] [2024-01-31 17:17:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:23,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:24,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:24,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883258426] [2024-01-31 17:17:24,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883258426] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:24,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817501981] [2024-01-31 17:17:24,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:17:24,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:24,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:24,195 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:17:24,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 17:17:24,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:17:24,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:17:24,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:17:24,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:24,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:24,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817501981] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:24,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:24,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:17:24,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962034605] [2024-01-31 17:17:24,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:24,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:17:24,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:24,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:17:24,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:17:24,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:17:24,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 856 places, 1849 transitions, 81131 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:17:24,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:24,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:17:24,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:32,662 INFO L124 PetriNetUnfolderBase]: 4330/7880 cut-off events. [2024-01-31 17:17:32,662 INFO L125 PetriNetUnfolderBase]: For 668051/668051 co-relation queries the response was YES. [2024-01-31 17:17:32,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137958 conditions, 7880 events. 4330/7880 cut-off events. For 668051/668051 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 57339 event pairs, 159 based on Foata normal form. 14/7894 useless extension candidates. Maximal degree in co-relation 137526. Up to 3373 conditions per place. [2024-01-31 17:17:32,799 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 777 selfloop transitions, 1360 changer transitions 43/2181 dead transitions. [2024-01-31 17:17:32,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 2181 transitions, 93811 flow [2024-01-31 17:17:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-01-31 17:17:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2024-01-31 17:17:32,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 704 transitions. [2024-01-31 17:17:32,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-01-31 17:17:32,801 INFO L175 Difference]: Start difference. First operand has 856 places, 1849 transitions, 81131 flow. Second operand 87 states and 704 transitions. [2024-01-31 17:17:32,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 2181 transitions, 93811 flow [2024-01-31 17:17:45,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 893 places, 2181 transitions, 92818 flow, removed 155 selfloop flow, removed 37 redundant places. [2024-01-31 17:17:45,296 INFO L231 Difference]: Finished difference. Result has 913 places, 1979 transitions, 90598 flow [2024-01-31 17:17:45,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=79802, PETRI_DIFFERENCE_MINUEND_PLACES=807, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=90598, PETRI_PLACES=913, PETRI_TRANSITIONS=1979} [2024-01-31 17:17:45,298 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 889 predicate places. [2024-01-31 17:17:45,298 INFO L495 AbstractCegarLoop]: Abstraction has has 913 places, 1979 transitions, 90598 flow [2024-01-31 17:17:45,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:17:45,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:45,299 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:45,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 17:17:45,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-01-31 17:17:45,509 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:17:45,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:45,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1534006019, now seen corresponding path program 21 times [2024-01-31 17:17:45,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:45,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748463235] [2024-01-31 17:17:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:45,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:45,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:45,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748463235] [2024-01-31 17:17:45,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748463235] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:45,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955121945] [2024-01-31 17:17:45,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:17:45,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:45,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:45,680 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:17:45,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 17:17:45,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:17:45,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:17:45,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:17:45,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:45,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:46,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955121945] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:46,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:46,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:17:46,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650691661] [2024-01-31 17:17:46,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:46,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:17:46,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:17:46,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:17:46,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:17:46,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 913 places, 1979 transitions, 90598 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:17:46,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:46,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:17:46,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:54,340 INFO L124 PetriNetUnfolderBase]: 4313/7844 cut-off events. [2024-01-31 17:17:54,340 INFO L125 PetriNetUnfolderBase]: For 761262/761262 co-relation queries the response was YES. [2024-01-31 17:17:54,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144149 conditions, 7844 events. 4313/7844 cut-off events. For 761262/761262 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 56958 event pairs, 151 based on Foata normal form. 3/7847 useless extension candidates. Maximal degree in co-relation 143777. Up to 3472 conditions per place. [2024-01-31 17:17:54,495 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 683 selfloop transitions, 1454 changer transitions 36/2174 dead transitions. [2024-01-31 17:17:54,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 984 places, 2174 transitions, 98421 flow [2024-01-31 17:17:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-01-31 17:17:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2024-01-31 17:17:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 626 transitions. [2024-01-31 17:17:54,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695395513577332 [2024-01-31 17:17:54,525 INFO L175 Difference]: Start difference. First operand has 913 places, 1979 transitions, 90598 flow. Second operand 77 states and 626 transitions. [2024-01-31 17:17:54,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 984 places, 2174 transitions, 98421 flow [2024-01-31 17:18:08,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 919 places, 2174 transitions, 96698 flow, removed 410 selfloop flow, removed 65 redundant places. [2024-01-31 17:18:09,033 INFO L231 Difference]: Finished difference. Result has 927 places, 2001 transitions, 93648 flow [2024-01-31 17:18:09,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=88998, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=93648, PETRI_PLACES=927, PETRI_TRANSITIONS=2001} [2024-01-31 17:18:09,040 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 903 predicate places. [2024-01-31 17:18:09,041 INFO L495 AbstractCegarLoop]: Abstraction has has 927 places, 2001 transitions, 93648 flow [2024-01-31 17:18:09,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:18:09,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:09,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:09,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-31 17:18:09,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-31 17:18:09,252 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:09,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:09,253 INFO L85 PathProgramCache]: Analyzing trace with hash -843408151, now seen corresponding path program 22 times [2024-01-31 17:18:09,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:09,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737409737] [2024-01-31 17:18:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:09,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:09,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:09,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737409737] [2024-01-31 17:18:09,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737409737] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:09,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115250344] [2024-01-31 17:18:09,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:18:09,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:09,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:09,428 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:09,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 17:18:09,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:18:09,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:09,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:18:09,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:09,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:10,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115250344] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:10,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:10,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:18:10,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920154961] [2024-01-31 17:18:10,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:10,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:18:10,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:10,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:18:10,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:18:10,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:18:10,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 927 places, 2001 transitions, 93648 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:18:10,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:10,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:18:10,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:18,894 INFO L124 PetriNetUnfolderBase]: 4582/8322 cut-off events. [2024-01-31 17:18:18,894 INFO L125 PetriNetUnfolderBase]: For 832813/832813 co-relation queries the response was YES. [2024-01-31 17:18:18,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156194 conditions, 8322 events. 4582/8322 cut-off events. For 832813/832813 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61190 event pairs, 194 based on Foata normal form. 3/8325 useless extension candidates. Maximal degree in co-relation 155813. Up to 4394 conditions per place. [2024-01-31 17:18:19,162 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 850 selfloop transitions, 1424 changer transitions 19/2294 dead transitions. [2024-01-31 17:18:19,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 984 places, 2294 transitions, 107587 flow [2024-01-31 17:18:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-01-31 17:18:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-01-31 17:18:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 502 transitions. [2024-01-31 17:18:19,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3621933621933622 [2024-01-31 17:18:19,163 INFO L175 Difference]: Start difference. First operand has 927 places, 2001 transitions, 93648 flow. Second operand 63 states and 502 transitions. [2024-01-31 17:18:19,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 984 places, 2294 transitions, 107587 flow [2024-01-31 17:18:35,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 935 places, 2294 transitions, 106644 flow, removed 167 selfloop flow, removed 49 redundant places. [2024-01-31 17:18:35,228 INFO L231 Difference]: Finished difference. Result has 960 places, 2151 transitions, 105642 flow [2024-01-31 17:18:35,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=92740, PETRI_DIFFERENCE_MINUEND_PLACES=873, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=105642, PETRI_PLACES=960, PETRI_TRANSITIONS=2151} [2024-01-31 17:18:35,231 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 936 predicate places. [2024-01-31 17:18:35,231 INFO L495 AbstractCegarLoop]: Abstraction has has 960 places, 2151 transitions, 105642 flow [2024-01-31 17:18:35,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:18:35,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:35,232 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:35,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-31 17:18:35,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:35,442 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:18:35,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:35,443 INFO L85 PathProgramCache]: Analyzing trace with hash 885639183, now seen corresponding path program 23 times [2024-01-31 17:18:35,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:35,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971331264] [2024-01-31 17:18:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:35,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:35,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:35,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971331264] [2024-01-31 17:18:35,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971331264] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:35,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709834175] [2024-01-31 17:18:35,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:18:35,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:35,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:35,684 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:18:35,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-31 17:18:35,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:18:35,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:35,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:18:35,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:36,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:18:36,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709834175] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:36,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:36,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:18:36,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350519042] [2024-01-31 17:18:36,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:36,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:18:36,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:18:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:18:36,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:18:36,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 960 places, 2151 transitions, 105642 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:18:36,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:36,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:18:36,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:47,912 INFO L124 PetriNetUnfolderBase]: 4926/8942 cut-off events. [2024-01-31 17:18:47,913 INFO L125 PetriNetUnfolderBase]: For 1027712/1027712 co-relation queries the response was YES. [2024-01-31 17:18:48,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177842 conditions, 8942 events. 4926/8942 cut-off events. For 1027712/1027712 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 66669 event pairs, 183 based on Foata normal form. 4/8946 useless extension candidates. Maximal degree in co-relation 177439. Up to 4216 conditions per place. [2024-01-31 17:18:48,099 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 841 selfloop transitions, 1648 changer transitions 19/2509 dead transitions. [2024-01-31 17:18:48,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1042 places, 2509 transitions, 123941 flow [2024-01-31 17:18:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-01-31 17:18:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2024-01-31 17:18:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 673 transitions. [2024-01-31 17:18:48,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598930481283422 [2024-01-31 17:18:48,102 INFO L175 Difference]: Start difference. First operand has 960 places, 2151 transitions, 105642 flow. Second operand 85 states and 673 transitions. [2024-01-31 17:18:48,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1042 places, 2509 transitions, 123941 flow [2024-01-31 17:19:07,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1018 places, 2509 transitions, 123470 flow, removed 90 selfloop flow, removed 24 redundant places. [2024-01-31 17:19:07,651 INFO L231 Difference]: Finished difference. Result has 1042 places, 2317 transitions, 121349 flow [2024-01-31 17:19:07,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=105191, PETRI_DIFFERENCE_MINUEND_PLACES=934, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=121349, PETRI_PLACES=1042, PETRI_TRANSITIONS=2317} [2024-01-31 17:19:07,653 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1018 predicate places. [2024-01-31 17:19:07,653 INFO L495 AbstractCegarLoop]: Abstraction has has 1042 places, 2317 transitions, 121349 flow [2024-01-31 17:19:07,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:19:07,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:07,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:19:07,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-01-31 17:19:07,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:07,867 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:07,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:07,868 INFO L85 PathProgramCache]: Analyzing trace with hash 596642341, now seen corresponding path program 24 times [2024-01-31 17:19:07,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:07,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837764441] [2024-01-31 17:19:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:07,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:08,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:08,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837764441] [2024-01-31 17:19:08,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837764441] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:19:08,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192784921] [2024-01-31 17:19:08,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:19:08,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:08,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:19:08,041 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:19:08,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-31 17:19:08,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 17:19:08,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:19:08,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:19:08,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:19:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:08,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:19:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:08,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192784921] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:19:08,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:19:08,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:19:08,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38953098] [2024-01-31 17:19:08,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:19:08,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:19:08,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:08,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:19:08,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:19:08,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:19:08,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1042 places, 2317 transitions, 121349 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:19:08,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:08,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:19:08,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:19:19,847 INFO L124 PetriNetUnfolderBase]: 5265/9662 cut-off events. [2024-01-31 17:19:19,855 INFO L125 PetriNetUnfolderBase]: For 1251958/1251958 co-relation queries the response was YES. [2024-01-31 17:19:19,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201913 conditions, 9662 events. 5265/9662 cut-off events. For 1251958/1251958 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 74025 event pairs, 250 based on Foata normal form. 3/9665 useless extension candidates. Maximal degree in co-relation 201484. Up to 5547 conditions per place. [2024-01-31 17:19:20,071 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 971 selfloop transitions, 1613 changer transitions 23/2608 dead transitions. [2024-01-31 17:19:20,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1090 places, 2608 transitions, 138477 flow [2024-01-31 17:19:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-01-31 17:19:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-01-31 17:19:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 418 transitions. [2024-01-31 17:19:20,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2024-01-31 17:19:20,074 INFO L175 Difference]: Start difference. First operand has 1042 places, 2317 transitions, 121349 flow. Second operand 52 states and 418 transitions. [2024-01-31 17:19:20,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1090 places, 2608 transitions, 138477 flow [2024-01-31 17:19:50,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1045 places, 2608 transitions, 136918 flow, removed 530 selfloop flow, removed 45 redundant places. [2024-01-31 17:19:50,659 INFO L231 Difference]: Finished difference. Result has 1065 places, 2467 transitions, 135424 flow [2024-01-31 17:19:50,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=119827, PETRI_DIFFERENCE_MINUEND_PLACES=994, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=135424, PETRI_PLACES=1065, PETRI_TRANSITIONS=2467} [2024-01-31 17:19:50,661 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1041 predicate places. [2024-01-31 17:19:50,661 INFO L495 AbstractCegarLoop]: Abstraction has has 1065 places, 2467 transitions, 135424 flow [2024-01-31 17:19:50,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:19:50,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:19:50,662 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:19:50,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-31 17:19:50,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-31 17:19:50,873 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:19:50,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:19:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash 367919823, now seen corresponding path program 25 times [2024-01-31 17:19:50,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:19:50,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850898410] [2024-01-31 17:19:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:19:50,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:19:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:51,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:19:51,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850898410] [2024-01-31 17:19:51,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850898410] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:19:51,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760421154] [2024-01-31 17:19:51,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:19:51,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:19:51,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:19:51,116 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:19:51,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-31 17:19:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:19:51,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:19:51,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:19:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:51,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:19:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:19:51,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760421154] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:19:51,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:19:51,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:19:51,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674235250] [2024-01-31 17:19:51,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:19:51,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:19:51,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:19:51,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:19:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:19:51,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:19:51,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1065 places, 2467 transitions, 135424 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:19:51,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:19:51,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:19:51,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:06,178 INFO L124 PetriNetUnfolderBase]: 5431/9997 cut-off events. [2024-01-31 17:20:06,179 INFO L125 PetriNetUnfolderBase]: For 1383627/1383627 co-relation queries the response was YES. [2024-01-31 17:20:06,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216372 conditions, 9997 events. 5431/9997 cut-off events. For 1383627/1383627 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 77406 event pairs, 223 based on Foata normal form. 4/10001 useless extension candidates. Maximal degree in co-relation 215922. Up to 5032 conditions per place. [2024-01-31 17:20:06,429 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 1043 selfloop transitions, 1624 changer transitions 32/2700 dead transitions. [2024-01-31 17:20:06,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1127 places, 2700 transitions, 147659 flow [2024-01-31 17:20:06,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-01-31 17:20:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-01-31 17:20:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 580 transitions. [2024-01-31 17:20:06,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39348710990502034 [2024-01-31 17:20:06,431 INFO L175 Difference]: Start difference. First operand has 1065 places, 2467 transitions, 135424 flow. Second operand 67 states and 580 transitions. [2024-01-31 17:20:06,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1127 places, 2700 transitions, 147659 flow [2024-01-31 17:20:38,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1106 places, 2700 transitions, 147077 flow, removed 103 selfloop flow, removed 21 redundant places. [2024-01-31 17:20:38,976 INFO L231 Difference]: Finished difference. Result has 1120 places, 2534 transitions, 145221 flow [2024-01-31 17:20:38,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=134865, PETRI_DIFFERENCE_MINUEND_PLACES=1040, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=145221, PETRI_PLACES=1120, PETRI_TRANSITIONS=2534} [2024-01-31 17:20:38,978 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1096 predicate places. [2024-01-31 17:20:38,978 INFO L495 AbstractCegarLoop]: Abstraction has has 1120 places, 2534 transitions, 145221 flow [2024-01-31 17:20:38,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:20:38,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:38,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:38,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-31 17:20:39,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-31 17:20:39,190 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:20:39,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:39,191 INFO L85 PathProgramCache]: Analyzing trace with hash 837088489, now seen corresponding path program 26 times [2024-01-31 17:20:39,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:39,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898834444] [2024-01-31 17:20:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:39,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:39,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:39,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898834444] [2024-01-31 17:20:39,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898834444] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:39,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095246663] [2024-01-31 17:20:39,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:20:39,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:39,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:39,364 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:20:39,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-31 17:20:39,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:20:39,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:39,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:20:39,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:39,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:40,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095246663] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:40,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:40,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:20:40,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061220799] [2024-01-31 17:20:40,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:40,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:20:40,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:40,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:20:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:20:40,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:20:40,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1120 places, 2534 transitions, 145221 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:20:40,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:40,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:20:40,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:58,511 INFO L124 PetriNetUnfolderBase]: 5516/10169 cut-off events. [2024-01-31 17:20:58,512 INFO L125 PetriNetUnfolderBase]: For 1525710/1525710 co-relation queries the response was YES. [2024-01-31 17:20:58,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227516 conditions, 10169 events. 5516/10169 cut-off events. For 1525710/1525710 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 79203 event pairs, 243 based on Foata normal form. 5/10174 useless extension candidates. Maximal degree in co-relation 226992. Up to 5173 conditions per place. [2024-01-31 17:20:58,805 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 977 selfloop transitions, 1768 changer transitions 24/2770 dead transitions. [2024-01-31 17:20:58,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1197 places, 2770 transitions, 157443 flow [2024-01-31 17:20:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-01-31 17:20:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2024-01-31 17:20:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 620 transitions. [2024-01-31 17:20:58,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3436807095343681 [2024-01-31 17:20:58,807 INFO L175 Difference]: Start difference. First operand has 1120 places, 2534 transitions, 145221 flow. Second operand 82 states and 620 transitions. [2024-01-31 17:20:58,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1197 places, 2770 transitions, 157443 flow [2024-01-31 17:21:34,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1148 places, 2770 transitions, 156644 flow, removed 67 selfloop flow, removed 49 redundant places. [2024-01-31 17:21:34,415 INFO L231 Difference]: Finished difference. Result has 1168 places, 2600 transitions, 154893 flow [2024-01-31 17:21:34,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=144446, PETRI_DIFFERENCE_MINUEND_PLACES=1067, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=804, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=154893, PETRI_PLACES=1168, PETRI_TRANSITIONS=2600} [2024-01-31 17:21:34,417 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1144 predicate places. [2024-01-31 17:21:34,417 INFO L495 AbstractCegarLoop]: Abstraction has has 1168 places, 2600 transitions, 154893 flow [2024-01-31 17:21:34,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:21:34,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:21:34,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:21:34,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-01-31 17:21:34,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-31 17:21:34,628 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:21:34,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:21:34,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1946004443, now seen corresponding path program 27 times [2024-01-31 17:21:34,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:21:34,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356398153] [2024-01-31 17:21:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:21:34,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:21:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:21:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:21:34,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:21:34,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356398153] [2024-01-31 17:21:34,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356398153] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:21:34,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106429310] [2024-01-31 17:21:34,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:21:34,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:21:34,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:21:34,802 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:21:34,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-31 17:21:34,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:21:34,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:21:34,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:21:34,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:21:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:21:35,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:21:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:21:35,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106429310] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:21:35,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:21:35,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:21:35,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186520871] [2024-01-31 17:21:35,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:21:35,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:21:35,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:21:35,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:21:35,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:21:35,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:21:35,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1168 places, 2600 transitions, 154893 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:21:35,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:21:35,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:21:35,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:21:53,736 INFO L124 PetriNetUnfolderBase]: 5746/10610 cut-off events. [2024-01-31 17:21:53,736 INFO L125 PetriNetUnfolderBase]: For 1778146/1778146 co-relation queries the response was YES. [2024-01-31 17:21:53,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247840 conditions, 10610 events. 5746/10610 cut-off events. For 1778146/1778146 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 83446 event pairs, 235 based on Foata normal form. 7/10617 useless extension candidates. Maximal degree in co-relation 247289. Up to 4737 conditions per place. [2024-01-31 17:21:54,007 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 1009 selfloop transitions, 1860 changer transitions 38/2908 dead transitions. [2024-01-31 17:21:54,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1255 places, 2908 transitions, 170768 flow [2024-01-31 17:21:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-01-31 17:21:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2024-01-31 17:21:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 764 transitions. [2024-01-31 17:21:54,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3734115347018573 [2024-01-31 17:21:54,009 INFO L175 Difference]: Start difference. First operand has 1168 places, 2600 transitions, 154893 flow. Second operand 93 states and 764 transitions. [2024-01-31 17:21:54,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1255 places, 2908 transitions, 170768 flow [2024-01-31 17:22:38,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1211 places, 2908 transitions, 169341 flow, removed 252 selfloop flow, removed 44 redundant places. [2024-01-31 17:22:38,222 INFO L231 Difference]: Finished difference. Result has 1233 places, 2695 transitions, 166434 flow [2024-01-31 17:22:38,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=153536, PETRI_DIFFERENCE_MINUEND_PLACES=1119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=166434, PETRI_PLACES=1233, PETRI_TRANSITIONS=2695} [2024-01-31 17:22:38,227 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1209 predicate places. [2024-01-31 17:22:38,227 INFO L495 AbstractCegarLoop]: Abstraction has has 1233 places, 2695 transitions, 166434 flow [2024-01-31 17:22:38,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:22:38,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:38,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:38,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-31 17:22:38,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-31 17:22:38,439 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:38,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:38,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2134061571, now seen corresponding path program 28 times [2024-01-31 17:22:38,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:38,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245451134] [2024-01-31 17:22:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:38,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:22:38,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:38,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245451134] [2024-01-31 17:22:38,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245451134] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:22:38,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370278575] [2024-01-31 17:22:38,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:22:38,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:22:38,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:22:38,663 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:22:38,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-31 17:22:38,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:22:38,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:22:38,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:22:38,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:22:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:22:38,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:22:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:22:39,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370278575] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:22:39,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:22:39,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:22:39,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462438617] [2024-01-31 17:22:39,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:22:39,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:22:39,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:39,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:22:39,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:22:39,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:22:39,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1233 places, 2695 transitions, 166434 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:22:39,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:39,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:22:39,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:22:54,965 INFO L124 PetriNetUnfolderBase]: 5863/10837 cut-off events. [2024-01-31 17:22:54,966 INFO L125 PetriNetUnfolderBase]: For 1921063/1921063 co-relation queries the response was YES. [2024-01-31 17:22:55,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260329 conditions, 10837 events. 5863/10837 cut-off events. For 1921063/1921063 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 85730 event pairs, 287 based on Foata normal form. 3/10840 useless extension candidates. Maximal degree in co-relation 259999. Up to 6077 conditions per place. [2024-01-31 17:22:55,476 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 1056 selfloop transitions, 1815 changer transitions 14/2886 dead transitions. [2024-01-31 17:22:55,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1271 places, 2886 transitions, 178767 flow [2024-01-31 17:22:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-31 17:22:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-31 17:22:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 369 transitions. [2024-01-31 17:22:55,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.381198347107438 [2024-01-31 17:22:55,477 INFO L175 Difference]: Start difference. First operand has 1233 places, 2695 transitions, 166434 flow. Second operand 44 states and 369 transitions. [2024-01-31 17:22:55,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1271 places, 2886 transitions, 178767 flow [2024-01-31 17:23:42,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1212 places, 2886 transitions, 177696 flow, removed 214 selfloop flow, removed 59 redundant places. [2024-01-31 17:23:42,947 INFO L231 Difference]: Finished difference. Result has 1226 places, 2764 transitions, 176701 flow [2024-01-31 17:23:42,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=165381, PETRI_DIFFERENCE_MINUEND_PLACES=1169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1746, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=912, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=176701, PETRI_PLACES=1226, PETRI_TRANSITIONS=2764} [2024-01-31 17:23:42,950 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1202 predicate places. [2024-01-31 17:23:42,950 INFO L495 AbstractCegarLoop]: Abstraction has has 1226 places, 2764 transitions, 176701 flow [2024-01-31 17:23:42,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:23:42,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:42,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:42,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:43,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:43,161 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:43,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:43,161 INFO L85 PathProgramCache]: Analyzing trace with hash -8770519, now seen corresponding path program 29 times [2024-01-31 17:23:43,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:43,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382967170] [2024-01-31 17:23:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:43,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:43,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:43,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382967170] [2024-01-31 17:23:43,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382967170] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:43,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889408362] [2024-01-31 17:23:43,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:23:43,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:43,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:43,318 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:43,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-31 17:23:43,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:23:43,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:43,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:23:43,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:43,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:43,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889408362] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:43,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:43,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:23:43,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745458159] [2024-01-31 17:23:43,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:43,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:23:43,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:43,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:23:43,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:23:43,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:23:43,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1226 places, 2764 transitions, 176701 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:23:43,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:43,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:23:43,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:04,445 INFO L124 PetriNetUnfolderBase]: 6136/11371 cut-off events. [2024-01-31 17:24:04,446 INFO L125 PetriNetUnfolderBase]: For 2262563/2262563 co-relation queries the response was YES. [2024-01-31 17:24:04,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283390 conditions, 11371 events. 6136/11371 cut-off events. For 2262563/2262563 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 90996 event pairs, 263 based on Foata normal form. 12/11383 useless extension candidates. Maximal degree in co-relation 282811. Up to 5214 conditions per place. [2024-01-31 17:24:04,915 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 1083 selfloop transitions, 1941 changer transitions 44/3069 dead transitions. [2024-01-31 17:24:04,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1304 places, 3069 transitions, 194719 flow [2024-01-31 17:24:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-01-31 17:24:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2024-01-31 17:24:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 678 transitions. [2024-01-31 17:24:04,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38047138047138046 [2024-01-31 17:24:04,916 INFO L175 Difference]: Start difference. First operand has 1226 places, 2764 transitions, 176701 flow. Second operand 81 states and 678 transitions. [2024-01-31 17:24:04,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1304 places, 3069 transitions, 194719 flow [2024-01-31 17:24:57,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1281 places, 3069 transitions, 194304 flow, removed 19 selfloop flow, removed 23 redundant places. [2024-01-31 17:24:57,725 INFO L231 Difference]: Finished difference. Result has 1302 places, 2868 transitions, 191124 flow [2024-01-31 17:24:57,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=176000, PETRI_DIFFERENCE_MINUEND_PLACES=1201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=191124, PETRI_PLACES=1302, PETRI_TRANSITIONS=2868} [2024-01-31 17:24:57,727 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1278 predicate places. [2024-01-31 17:24:57,728 INFO L495 AbstractCegarLoop]: Abstraction has has 1302 places, 2868 transitions, 191124 flow [2024-01-31 17:24:57,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:24:57,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:57,728 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:57,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:57,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:57,939 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:57,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:57,940 INFO L85 PathProgramCache]: Analyzing trace with hash -155936885, now seen corresponding path program 30 times [2024-01-31 17:24:57,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:57,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121463280] [2024-01-31 17:24:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:57,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:58,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:58,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121463280] [2024-01-31 17:24:58,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121463280] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:58,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236723627] [2024-01-31 17:24:58,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:24:58,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:58,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:58,153 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:58,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-31 17:24:58,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:24:58,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:58,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:24:58,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:58,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:58,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236723627] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:58,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:58,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:24:58,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675288245] [2024-01-31 17:24:58,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:58,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:24:58,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:58,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:24:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:24:58,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:24:58,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1302 places, 2868 transitions, 191124 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:24:58,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:58,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:24:58,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:25,246 INFO L124 PetriNetUnfolderBase]: 6110/11331 cut-off events. [2024-01-31 17:25:25,247 INFO L125 PetriNetUnfolderBase]: For 2503962/2503962 co-relation queries the response was YES. [2024-01-31 17:25:25,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292866 conditions, 11331 events. 6110/11331 cut-off events. For 2503962/2503962 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 90674 event pairs, 259 based on Foata normal form. 3/11334 useless extension candidates. Maximal degree in co-relation 292260. Up to 4966 conditions per place. [2024-01-31 17:25:25,722 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 907 selfloop transitions, 2129 changer transitions 43/3080 dead transitions. [2024-01-31 17:25:25,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1382 places, 3080 transitions, 202242 flow [2024-01-31 17:25:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-01-31 17:25:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-01-31 17:25:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 680 transitions. [2024-01-31 17:25:25,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3594080338266385 [2024-01-31 17:25:25,724 INFO L175 Difference]: Start difference. First operand has 1302 places, 2868 transitions, 191124 flow. Second operand 86 states and 680 transitions. [2024-01-31 17:25:25,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1382 places, 3080 transitions, 202242 flow [2024-01-31 17:26:25,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1338 places, 3080 transitions, 201090 flow, removed 365 selfloop flow, removed 44 redundant places. [2024-01-31 17:26:26,060 INFO L231 Difference]: Finished difference. Result has 1346 places, 2884 transitions, 196469 flow [2024-01-31 17:26:26,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=190111, PETRI_DIFFERENCE_MINUEND_PLACES=1253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=196469, PETRI_PLACES=1346, PETRI_TRANSITIONS=2884} [2024-01-31 17:26:26,063 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1322 predicate places. [2024-01-31 17:26:26,063 INFO L495 AbstractCegarLoop]: Abstraction has has 1346 places, 2884 transitions, 196469 flow [2024-01-31 17:26:26,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:26:26,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:26,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:26,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:26,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-01-31 17:26:26,274 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:26:26,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:26,274 INFO L85 PathProgramCache]: Analyzing trace with hash 351028551, now seen corresponding path program 31 times [2024-01-31 17:26:26,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:26,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839765862] [2024-01-31 17:26:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:26,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:26,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839765862] [2024-01-31 17:26:26,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839765862] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:26:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228448585] [2024-01-31 17:26:26,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:26:26,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:26,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:26,469 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:26:26,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-31 17:26:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:26,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:26:26,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:26,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:26:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:27,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228448585] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:26:27,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:26:27,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:26:27,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850897548] [2024-01-31 17:26:27,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:26:27,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:26:27,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:27,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:26:27,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:26:27,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:26:27,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1346 places, 2884 transitions, 196469 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:26:27,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:27,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:26:27,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:47,551 INFO L124 PetriNetUnfolderBase]: 6378/11815 cut-off events. [2024-01-31 17:26:47,552 INFO L125 PetriNetUnfolderBase]: For 2651492/2651492 co-relation queries the response was YES. [2024-01-31 17:26:47,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313286 conditions, 11815 events. 6378/11815 cut-off events. For 2651492/2651492 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 95050 event pairs, 279 based on Foata normal form. 4/11819 useless extension candidates. Maximal degree in co-relation 312674. Up to 6549 conditions per place. [2024-01-31 17:26:47,880 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 1215 selfloop transitions, 1916 changer transitions 25/3157 dead transitions. [2024-01-31 17:26:47,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1404 places, 3157 transitions, 214373 flow [2024-01-31 17:26:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-01-31 17:26:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-01-31 17:26:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 535 transitions. [2024-01-31 17:26:47,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741258741258741 [2024-01-31 17:26:47,882 INFO L175 Difference]: Start difference. First operand has 1346 places, 2884 transitions, 196469 flow. Second operand 65 states and 535 transitions. [2024-01-31 17:26:47,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1404 places, 3157 transitions, 214373 flow [2024-01-31 17:27:56,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1339 places, 3157 transitions, 213025 flow, removed 157 selfloop flow, removed 65 redundant places. [2024-01-31 17:27:56,758 INFO L231 Difference]: Finished difference. Result has 1363 places, 3014 transitions, 212014 flow [2024-01-31 17:27:56,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=195166, PETRI_DIFFERENCE_MINUEND_PLACES=1275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1787, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1038, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=212014, PETRI_PLACES=1363, PETRI_TRANSITIONS=3014} [2024-01-31 17:27:56,761 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1339 predicate places. [2024-01-31 17:27:56,761 INFO L495 AbstractCegarLoop]: Abstraction has has 1363 places, 3014 transitions, 212014 flow [2024-01-31 17:27:56,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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) [2024-01-31 17:27:56,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:56,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:56,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-01-31 17:27:56,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:56,972 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:27:56,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:56,973 INFO L85 PathProgramCache]: Analyzing trace with hash 624932871, now seen corresponding path program 32 times [2024-01-31 17:27:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:56,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464094346] [2024-01-31 17:27:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:27:57,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464094346] [2024-01-31 17:27:57,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464094346] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928048347] [2024-01-31 17:27:57,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:27:57,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:57,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:57,141 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:57,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-31 17:27:57,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:27:57,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:57,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-31 17:27:57,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:27:57,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:27:57,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928048347] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:57,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:27:57,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-31 17:27:57,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66396348] [2024-01-31 17:27:57,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:57,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:27:57,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:57,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:27:57,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:27:57,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:27:57,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1363 places, 3014 transitions, 212014 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-01-31 17:27:57,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:57,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:27:57,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:28:23,859 INFO L124 PetriNetUnfolderBase]: 6892/12768 cut-off events. [2024-01-31 17:28:23,859 INFO L125 PetriNetUnfolderBase]: For 3174828/3174828 co-relation queries the response was YES. [2024-01-31 17:28:24,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349783 conditions, 12768 events. 6892/12768 cut-off events. For 3174828/3174828 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 104410 event pairs, 295 based on Foata normal form. 6/12774 useless extension candidates. Maximal degree in co-relation 349148. Up to 6858 conditions per place. [2024-01-31 17:28:24,511 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 1273 selfloop transitions, 2165 changer transitions 26/3465 dead transitions. [2024-01-31 17:28:24,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1445 places, 3465 transitions, 241726 flow [2024-01-31 17:28:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-01-31 17:28:24,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2024-01-31 17:28:24,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 657 transitions. [2024-01-31 17:28:24,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3432601880877743 [2024-01-31 17:28:24,513 INFO L175 Difference]: Start difference. First operand has 1363 places, 3014 transitions, 212014 flow. Second operand 87 states and 657 transitions. [2024-01-31 17:28:24,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1445 places, 3465 transitions, 241726 flow Killed by 15