./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure3.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-figure3.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-figure3.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-figure3.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 17:04:26,346 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:04:26,434 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:04:26,444 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:04:26,445 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:04:26,475 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:04:26,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:04:26,476 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:04:26,476 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:04:26,480 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:04:26,481 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:04:26,481 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:04:26,482 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:04:26,483 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:04:26,483 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:04:26,484 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:04:26,484 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:04:26,484 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:04:26,485 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:04:26,485 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:04:26,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:04:26,486 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:04:26,487 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:04:26,487 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:04:26,487 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:04:26,487 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:04:26,488 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:04:26,488 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:04:26,489 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:04:26,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:04:26,490 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:04:26,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:04:26,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:04:26,491 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:04:26,491 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:04:26,491 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:04:26,491 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:04:26,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:04:26,492 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:04:26,492 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:04:26,492 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:04:26,492 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:04:26,493 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:04:26,493 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:04:26,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:04:26,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:04:26,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:04:26,778 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:04:26,780 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:04:26,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-01-31 17:04:28,090 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:04:28,289 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:04:28,290 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-01-31 17:04:28,300 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5ffe925/133c119148ae41a996ecae1e01f1351b/FLAG907ad7d51 [2024-01-31 17:04:28,315 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5ffe925/133c119148ae41a996ecae1e01f1351b [2024-01-31 17:04:28,317 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:04:28,318 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:04:28,320 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-figure3.wvr.yml/witness.yml [2024-01-31 17:04:28,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:04:28,428 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:04:28,431 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:04:28,431 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:04:28,435 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:04:28,436 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:04:28" (1/2) ... [2024-01-31 17:04:28,437 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@430e173f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:04:28, skipping insertion in model container [2024-01-31 17:04:28,437 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:04:28" (1/2) ... [2024-01-31 17:04:28,438 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f739d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:04:28, skipping insertion in model container [2024-01-31 17:04:28,438 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:04:28" (2/2) ... [2024-01-31 17:04:28,439 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@430e173f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28, skipping insertion in model container [2024-01-31 17:04:28,439 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:04:28" (2/2) ... [2024-01-31 17:04:28,439 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:04:28,466 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:04:28,486 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:04:28,650 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-figure3.wvr.c[2147,2160] [2024-01-31 17:04:28,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:04:28,663 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:04:28,678 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-figure3.wvr.c[2147,2160] [2024-01-31 17:04:28,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:04:28,692 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:04:28,693 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28 WrapperNode [2024-01-31 17:04:28,693 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:04:28,694 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:04:28,694 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:04:28,694 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:04:28,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (1/1) ... [2024-01-31 17:04:28,712 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (1/1) ... [2024-01-31 17:04:28,728 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2024-01-31 17:04:28,729 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:04:28,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:04:28,730 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:04:28,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:04:28,740 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (1/1) ... [2024-01-31 17:04:28,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (1/1) ... [2024-01-31 17:04:28,753 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (1/1) ... [2024-01-31 17:04:28,775 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 17:04:28,777 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (1/1) ... [2024-01-31 17:04:28,778 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (1/1) ... [2024-01-31 17:04:28,783 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (1/1) ... [2024-01-31 17:04:28,785 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (1/1) ... [2024-01-31 17:04:28,787 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (1/1) ... [2024-01-31 17:04:28,787 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (1/1) ... [2024-01-31 17:04:28,789 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:04:28,790 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:04:28,790 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:04:28,790 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:04:28,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (1/1) ... [2024-01-31 17:04:28,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:04:28,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:28,820 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 17:04:28,828 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 17:04:28,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:04:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:04:28,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:04:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:04:28,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:04:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:04:28,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:04:28,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:04:28,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:04:28,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:04:28,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:04:28,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:04:28,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:04:28,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:04:28,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:04:28,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:04:28,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:04:28,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:04:28,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:04:28,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:04:28,863 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 17:04:28,987 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:04:28,989 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:04:29,169 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:04:29,169 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:04:29,325 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:04:29,326 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 17:04:29,326 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:04:29 BoogieIcfgContainer [2024-01-31 17:04:29,326 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:04:29,328 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:04:29,328 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:04:29,331 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:04:29,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:04:28" (1/4) ... [2024-01-31 17:04:29,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379b665e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:04:29, skipping insertion in model container [2024-01-31 17:04:29,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:04:28" (2/4) ... [2024-01-31 17:04:29,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379b665e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:04:29, skipping insertion in model container [2024-01-31 17:04:29,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:28" (3/4) ... [2024-01-31 17:04:29,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379b665e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:04:29, skipping insertion in model container [2024-01-31 17:04:29,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:04:29" (4/4) ... [2024-01-31 17:04:29,334 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2024-01-31 17:04:29,350 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:04:29,351 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:04:29,351 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:04:29,420 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:04:29,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2024-01-31 17:04:29,491 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-01-31 17:04:29,491 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:04:29,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-01-31 17:04:29,494 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2024-01-31 17:04:29,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2024-01-31 17:04:29,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:04:29,529 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;@65dc08d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:04:29,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:04:29,554 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:04:29,554 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-01-31 17:04:29,555 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:04:29,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:29,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:29,556 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 17:04:29,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:29,562 INFO L85 PathProgramCache]: Analyzing trace with hash 954584566, now seen corresponding path program 1 times [2024-01-31 17:04:29,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:29,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571438123] [2024-01-31 17:04:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:29,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:29,971 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 17:04:29,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:29,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571438123] [2024-01-31 17:04:29,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571438123] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:29,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:29,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:04:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912889634] [2024-01-31 17:04:29,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:29,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:04:29,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:30,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:04:30,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:04:30,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-31 17:04:30,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:30,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:30,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-31 17:04:30,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:30,137 INFO L124 PetriNetUnfolderBase]: 82/167 cut-off events. [2024-01-31 17:04:30,137 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-01-31 17:04:30,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 167 events. 82/167 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 523 event pairs, 30 based on Foata normal form. 6/172 useless extension candidates. Maximal degree in co-relation 270. Up to 99 conditions per place. [2024-01-31 17:04:30,143 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 21 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2024-01-31 17:04:30,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 135 flow [2024-01-31 17:04:30,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:04:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:04:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-01-31 17:04:30,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-01-31 17:04:30,156 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 3 states and 44 transitions. [2024-01-31 17:04:30,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 135 flow [2024-01-31 17:04:30,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:04:30,162 INFO L231 Difference]: Finished difference. Result has 24 places, 21 transitions, 58 flow [2024-01-31 17:04:30,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2024-01-31 17:04:30,168 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2024-01-31 17:04:30,168 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 58 flow [2024-01-31 17:04:30,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:30,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:30,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:30,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:04:30,170 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 17:04:30,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:30,171 INFO L85 PathProgramCache]: Analyzing trace with hash -653057610, now seen corresponding path program 1 times [2024-01-31 17:04:30,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:30,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258540454] [2024-01-31 17:04:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:30,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:30,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:30,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258540454] [2024-01-31 17:04:30,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258540454] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:30,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:30,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:04:30,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744914195] [2024-01-31 17:04:30,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:30,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:04:30,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:30,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:04:30,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:04:30,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:30,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:30,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:30,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:30,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:30,563 INFO L124 PetriNetUnfolderBase]: 146/283 cut-off events. [2024-01-31 17:04:30,563 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-31 17:04:30,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 283 events. 146/283 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1114 event pairs, 66 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 241. Up to 189 conditions per place. [2024-01-31 17:04:30,567 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 30 selfloop transitions, 7 changer transitions 3/43 dead transitions. [2024-01-31 17:04:30,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 43 transitions, 187 flow [2024-01-31 17:04:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:04:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:04:30,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-01-31 17:04:30,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2024-01-31 17:04:30,573 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 58 flow. Second operand 5 states and 61 transitions. [2024-01-31 17:04:30,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 43 transitions, 187 flow [2024-01-31 17:04:30,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:04:30,578 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 108 flow [2024-01-31 17:04:30,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2024-01-31 17:04:30,580 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2024-01-31 17:04:30,582 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 108 flow [2024-01-31 17:04:30,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:30,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:30,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:30,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:04:30,589 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 17:04:30,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:30,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1678281516, now seen corresponding path program 2 times [2024-01-31 17:04:30,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:30,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478993337] [2024-01-31 17:04:30,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:30,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:30,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:30,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478993337] [2024-01-31 17:04:30,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478993337] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:30,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:30,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:04:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123945958] [2024-01-31 17:04:30,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:30,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:04:30,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:30,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:04:30,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:04:30,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:30,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 17:04:30,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:30,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:30,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:30,887 INFO L124 PetriNetUnfolderBase]: 166/316 cut-off events. [2024-01-31 17:04:30,888 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2024-01-31 17:04:30,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 316 events. 166/316 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1288 event pairs, 4 based on Foata normal form. 10/324 useless extension candidates. Maximal degree in co-relation 387. Up to 134 conditions per place. [2024-01-31 17:04:30,891 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 47 selfloop transitions, 13 changer transitions 1/64 dead transitions. [2024-01-31 17:04:30,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 64 transitions, 358 flow [2024-01-31 17:04:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:04:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:04:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-01-31 17:04:30,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2024-01-31 17:04:30,896 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 108 flow. Second operand 7 states and 86 transitions. [2024-01-31 17:04:30,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 64 transitions, 358 flow [2024-01-31 17:04:30,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 64 transitions, 356 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-01-31 17:04:30,901 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 214 flow [2024-01-31 17:04:30,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-01-31 17:04:30,903 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2024-01-31 17:04:30,903 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 214 flow [2024-01-31 17:04:30,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 17:04:30,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:30,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:30,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:04:30,904 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 17:04:30,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:30,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1893552388, now seen corresponding path program 3 times [2024-01-31 17:04:30,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:30,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716716146] [2024-01-31 17:04:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:30,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:31,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:31,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716716146] [2024-01-31 17:04:31,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716716146] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:31,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:31,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:04:31,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342106976] [2024-01-31 17:04:31,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:31,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:04:31,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:31,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:04:31,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:04:31,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:31,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:31,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:31,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:31,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:31,122 INFO L124 PetriNetUnfolderBase]: 219/416 cut-off events. [2024-01-31 17:04:31,122 INFO L125 PetriNetUnfolderBase]: For 742/742 co-relation queries the response was YES. [2024-01-31 17:04:31,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 416 events. 219/416 cut-off events. For 742/742 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1676 event pairs, 69 based on Foata normal form. 6/417 useless extension candidates. Maximal degree in co-relation 995. Up to 179 conditions per place. [2024-01-31 17:04:31,126 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 44 selfloop transitions, 10 changer transitions 2/59 dead transitions. [2024-01-31 17:04:31,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 443 flow [2024-01-31 17:04:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:04:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:04:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-01-31 17:04:31,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-01-31 17:04:31,128 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 214 flow. Second operand 5 states and 60 transitions. [2024-01-31 17:04:31,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 443 flow [2024-01-31 17:04:31,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 443 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:04:31,133 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 270 flow [2024-01-31 17:04:31,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2024-01-31 17:04:31,135 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2024-01-31 17:04:31,135 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 270 flow [2024-01-31 17:04:31,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:31,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:31,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:31,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:04:31,136 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 17:04:31,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:31,137 INFO L85 PathProgramCache]: Analyzing trace with hash -588269998, now seen corresponding path program 4 times [2024-01-31 17:04:31,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:31,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585397510] [2024-01-31 17:04:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:31,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:31,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:31,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585397510] [2024-01-31 17:04:31,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585397510] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:31,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585808127] [2024-01-31 17:04:31,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:04:31,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:31,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:31,276 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 17:04:31,283 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 17:04:31,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:04:31,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:31,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:31,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:31,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:31,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585808127] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:31,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:31,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-01-31 17:04:31,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452159610] [2024-01-31 17:04:31,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:31,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:04:31,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:31,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:04:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:04:31,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:31,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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 17:04:31,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:31,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:31,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:31,771 INFO L124 PetriNetUnfolderBase]: 323/608 cut-off events. [2024-01-31 17:04:31,772 INFO L125 PetriNetUnfolderBase]: For 1506/1506 co-relation queries the response was YES. [2024-01-31 17:04:31,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2345 conditions, 608 events. 323/608 cut-off events. For 1506/1506 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2860 event pairs, 33 based on Foata normal form. 10/610 useless extension candidates. Maximal degree in co-relation 1653. Up to 169 conditions per place. [2024-01-31 17:04:31,777 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 53 selfloop transitions, 35 changer transitions 2/93 dead transitions. [2024-01-31 17:04:31,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 93 transitions, 759 flow [2024-01-31 17:04:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 17:04:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 17:04:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-01-31 17:04:31,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173913043478261 [2024-01-31 17:04:31,781 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 270 flow. Second operand 10 states and 119 transitions. [2024-01-31 17:04:31,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 93 transitions, 759 flow [2024-01-31 17:04:31,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 735 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-31 17:04:31,788 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 522 flow [2024-01-31 17:04:31,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=522, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-01-31 17:04:31,791 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 36 predicate places. [2024-01-31 17:04:31,791 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 522 flow [2024-01-31 17:04:31,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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 17:04:31,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:31,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:31,811 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 17:04:32,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:32,006 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 17:04:32,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:32,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2139409378, now seen corresponding path program 5 times [2024-01-31 17:04:32,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:32,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550498236] [2024-01-31 17:04:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:32,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:32,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:32,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550498236] [2024-01-31 17:04:32,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550498236] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:32,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:32,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:04:32,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603166619] [2024-01-31 17:04:32,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:32,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:04:32,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:32,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:04:32,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:04:32,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:32,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 522 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:32,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:32,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:32,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:32,252 INFO L124 PetriNetUnfolderBase]: 328/607 cut-off events. [2024-01-31 17:04:32,253 INFO L125 PetriNetUnfolderBase]: For 3233/3233 co-relation queries the response was YES. [2024-01-31 17:04:32,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2869 conditions, 607 events. 328/607 cut-off events. For 3233/3233 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2742 event pairs, 105 based on Foata normal form. 2/604 useless extension candidates. Maximal degree in co-relation 2129. Up to 321 conditions per place. [2024-01-31 17:04:32,259 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 49 selfloop transitions, 20 changer transitions 1/73 dead transitions. [2024-01-31 17:04:32,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 799 flow [2024-01-31 17:04:32,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:04:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:04:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-01-31 17:04:32,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-01-31 17:04:32,262 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 522 flow. Second operand 5 states and 60 transitions. [2024-01-31 17:04:32,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 799 flow [2024-01-31 17:04:32,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 73 transitions, 719 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-01-31 17:04:32,273 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 555 flow [2024-01-31 17:04:32,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-01-31 17:04:32,276 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 38 predicate places. [2024-01-31 17:04:32,276 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 555 flow [2024-01-31 17:04:32,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:32,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:32,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:32,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 17:04:32,277 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 17:04:32,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2113758336, now seen corresponding path program 6 times [2024-01-31 17:04:32,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:32,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648205951] [2024-01-31 17:04:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:32,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:32,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:32,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648205951] [2024-01-31 17:04:32,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648205951] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:32,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:32,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:04:32,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629339683] [2024-01-31 17:04:32,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:32,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:04:32,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:32,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:04:32,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:04:32,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:32,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 555 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 17:04:32,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:32,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:32,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:32,530 INFO L124 PetriNetUnfolderBase]: 326/598 cut-off events. [2024-01-31 17:04:32,530 INFO L125 PetriNetUnfolderBase]: For 3227/3227 co-relation queries the response was YES. [2024-01-31 17:04:32,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2800 conditions, 598 events. 326/598 cut-off events. For 3227/3227 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2644 event pairs, 97 based on Foata normal form. 8/601 useless extension candidates. Maximal degree in co-relation 2169. Up to 301 conditions per place. [2024-01-31 17:04:32,537 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 48 selfloop transitions, 26 changer transitions 0/77 dead transitions. [2024-01-31 17:04:32,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 796 flow [2024-01-31 17:04:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:04:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:04:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-01-31 17:04:32,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2024-01-31 17:04:32,538 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 555 flow. Second operand 6 states and 70 transitions. [2024-01-31 17:04:32,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 796 flow [2024-01-31 17:04:32,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 750 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-01-31 17:04:32,547 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 585 flow [2024-01-31 17:04:32,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=585, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-01-31 17:04:32,548 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2024-01-31 17:04:32,548 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 585 flow [2024-01-31 17:04:32,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 17:04:32,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:32,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:32,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 17:04:32,549 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 17:04:32,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:32,549 INFO L85 PathProgramCache]: Analyzing trace with hash -616972943, now seen corresponding path program 1 times [2024-01-31 17:04:32,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:32,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865910371] [2024-01-31 17:04:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:32,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:32,679 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 17:04:32,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:32,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865910371] [2024-01-31 17:04:32,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865910371] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:32,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048224391] [2024-01-31 17:04:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:32,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:32,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:32,681 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 17:04:32,705 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 17:04:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:32,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 17:04:32,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:04:32,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:04:32,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048224391] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:32,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:04:32,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-01-31 17:04:32,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876501331] [2024-01-31 17:04:32,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:32,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:04:32,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:32,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:04:32,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:04:32,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-31 17:04:32,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 585 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:32,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:32,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-31 17:04:32,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:32,947 INFO L124 PetriNetUnfolderBase]: 495/989 cut-off events. [2024-01-31 17:04:32,947 INFO L125 PetriNetUnfolderBase]: For 4944/4986 co-relation queries the response was YES. [2024-01-31 17:04:32,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4435 conditions, 989 events. 495/989 cut-off events. For 4944/4986 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5266 event pairs, 86 based on Foata normal form. 15/999 useless extension candidates. Maximal degree in co-relation 2552. Up to 395 conditions per place. [2024-01-31 17:04:32,957 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 74 selfloop transitions, 5 changer transitions 7/103 dead transitions. [2024-01-31 17:04:32,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 103 transitions, 1104 flow [2024-01-31 17:04:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:04:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:04:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-01-31 17:04:32,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-01-31 17:04:32,958 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 585 flow. Second operand 4 states and 65 transitions. [2024-01-31 17:04:32,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 103 transitions, 1104 flow [2024-01-31 17:04:32,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 103 transitions, 1043 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-01-31 17:04:32,971 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 581 flow [2024-01-31 17:04:32,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=581, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-01-31 17:04:32,973 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2024-01-31 17:04:32,973 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 581 flow [2024-01-31 17:04:32,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:32,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:32,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:32,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-31 17:04:33,187 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,SelfDestructingSolverStorable7 [2024-01-31 17:04:33,188 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 17:04:33,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:33,188 INFO L85 PathProgramCache]: Analyzing trace with hash 451334903, now seen corresponding path program 2 times [2024-01-31 17:04:33,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:33,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761126744] [2024-01-31 17:04:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:33,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:33,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:33,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761126744] [2024-01-31 17:04:33,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761126744] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:33,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423503017] [2024-01-31 17:04:33,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:04:33,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:33,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:33,388 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 17:04:33,414 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 17:04:33,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:33,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:33,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:04:33,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:33,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:33,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423503017] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:33,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:33,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:04:33,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911980570] [2024-01-31 17:04:33,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:33,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:04:33,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:33,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:04:33,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:04:34,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:34,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 581 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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 17:04:34,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:34,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:34,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:35,277 INFO L124 PetriNetUnfolderBase]: 1176/2030 cut-off events. [2024-01-31 17:04:35,277 INFO L125 PetriNetUnfolderBase]: For 9690/9712 co-relation queries the response was YES. [2024-01-31 17:04:35,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9838 conditions, 2030 events. 1176/2030 cut-off events. For 9690/9712 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10273 event pairs, 68 based on Foata normal form. 22/2050 useless extension candidates. Maximal degree in co-relation 5874. Up to 671 conditions per place. [2024-01-31 17:04:35,296 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 123 selfloop transitions, 87 changer transitions 7/222 dead transitions. [2024-01-31 17:04:35,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 222 transitions, 2353 flow [2024-01-31 17:04:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 17:04:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 17:04:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 233 transitions. [2024-01-31 17:04:35,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4824016563146998 [2024-01-31 17:04:35,298 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 581 flow. Second operand 21 states and 233 transitions. [2024-01-31 17:04:35,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 222 transitions, 2353 flow [2024-01-31 17:04:35,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 222 transitions, 2321 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-01-31 17:04:35,312 INFO L231 Difference]: Finished difference. Result has 95 places, 127 transitions, 1477 flow [2024-01-31 17:04:35,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1477, PETRI_PLACES=95, PETRI_TRANSITIONS=127} [2024-01-31 17:04:35,312 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 70 predicate places. [2024-01-31 17:04:35,313 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 127 transitions, 1477 flow [2024-01-31 17:04:35,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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 17:04:35,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:35,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:35,331 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 17:04:35,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:35,528 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 17:04:35,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash 209099007, now seen corresponding path program 3 times [2024-01-31 17:04:35,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:35,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719271530] [2024-01-31 17:04:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:35,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:35,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719271530] [2024-01-31 17:04:35,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719271530] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:35,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533155061] [2024-01-31 17:04:35,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:04:35,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:35,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:35,661 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 17:04:35,663 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 17:04:35,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 17:04:35,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:35,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:04:35,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:35,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:35,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533155061] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:35,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:35,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:04:35,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131212188] [2024-01-31 17:04:35,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:35,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:04:35,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:35,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:04:35,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:04:35,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:35,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 127 transitions, 1477 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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 17:04:35,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:35,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:35,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:36,501 INFO L124 PetriNetUnfolderBase]: 1266/2190 cut-off events. [2024-01-31 17:04:36,501 INFO L125 PetriNetUnfolderBase]: For 23337/23369 co-relation queries the response was YES. [2024-01-31 17:04:36,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12907 conditions, 2190 events. 1266/2190 cut-off events. For 23337/23369 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11502 event pairs, 180 based on Foata normal form. 26/2208 useless extension candidates. Maximal degree in co-relation 8588. Up to 973 conditions per place. [2024-01-31 17:04:36,524 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 125 selfloop transitions, 75 changer transitions 11/216 dead transitions. [2024-01-31 17:04:36,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 216 transitions, 2849 flow [2024-01-31 17:04:36,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:04:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:04:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 157 transitions. [2024-01-31 17:04:36,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45507246376811594 [2024-01-31 17:04:36,526 INFO L175 Difference]: Start difference. First operand has 95 places, 127 transitions, 1477 flow. Second operand 15 states and 157 transitions. [2024-01-31 17:04:36,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 216 transitions, 2849 flow [2024-01-31 17:04:36,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 216 transitions, 2507 flow, removed 154 selfloop flow, removed 3 redundant places. [2024-01-31 17:04:36,566 INFO L231 Difference]: Finished difference. Result has 116 places, 152 transitions, 1829 flow [2024-01-31 17:04:36,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1829, PETRI_PLACES=116, PETRI_TRANSITIONS=152} [2024-01-31 17:04:36,567 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 91 predicate places. [2024-01-31 17:04:36,567 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 152 transitions, 1829 flow [2024-01-31 17:04:36,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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 17:04:36,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:36,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:36,585 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 17:04:36,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:36,782 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 17:04:36,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:36,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1110413583, now seen corresponding path program 4 times [2024-01-31 17:04:36,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:36,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483428921] [2024-01-31 17:04:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:36,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:36,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:36,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483428921] [2024-01-31 17:04:36,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483428921] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:36,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177096748] [2024-01-31 17:04:36,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:04:36,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:36,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:36,926 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 17:04:36,946 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 17:04:36,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:04:36,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:36,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:04:36,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:37,072 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 17:04:37,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:37,164 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 17:04:37,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177096748] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:37,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:37,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 17:04:37,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896741464] [2024-01-31 17:04:37,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:37,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:04:37,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:37,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:04:37,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:04:37,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:37,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 152 transitions, 1829 flow. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 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 17:04:37,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:37,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:37,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:37,996 INFO L124 PetriNetUnfolderBase]: 1704/2904 cut-off events. [2024-01-31 17:04:37,997 INFO L125 PetriNetUnfolderBase]: For 29965/29997 co-relation queries the response was YES. [2024-01-31 17:04:38,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16961 conditions, 2904 events. 1704/2904 cut-off events. For 29965/29997 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15819 event pairs, 37 based on Foata normal form. 70/2956 useless extension candidates. Maximal degree in co-relation 16516. Up to 907 conditions per place. [2024-01-31 17:04:38,027 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 131 selfloop transitions, 234 changer transitions 3/373 dead transitions. [2024-01-31 17:04:38,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 373 transitions, 4861 flow [2024-01-31 17:04:38,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 17:04:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 17:04:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 232 transitions. [2024-01-31 17:04:38,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43856332703213613 [2024-01-31 17:04:38,029 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 1829 flow. Second operand 23 states and 232 transitions. [2024-01-31 17:04:38,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 373 transitions, 4861 flow [2024-01-31 17:04:38,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 373 transitions, 4722 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-01-31 17:04:38,102 INFO L231 Difference]: Finished difference. Result has 144 places, 287 transitions, 4255 flow [2024-01-31 17:04:38,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4255, PETRI_PLACES=144, PETRI_TRANSITIONS=287} [2024-01-31 17:04:38,103 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 119 predicate places. [2024-01-31 17:04:38,103 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 287 transitions, 4255 flow [2024-01-31 17:04:38,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 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 17:04:38,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:38,104 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:38,123 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 17:04:38,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-31 17:04:38,321 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 17:04:38,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:38,321 INFO L85 PathProgramCache]: Analyzing trace with hash 624163753, now seen corresponding path program 5 times [2024-01-31 17:04:38,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:38,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988676304] [2024-01-31 17:04:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:38,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:38,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:38,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988676304] [2024-01-31 17:04:38,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988676304] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:38,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193417856] [2024-01-31 17:04:38,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:04:38,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:38,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:38,491 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 17:04:38,494 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 17:04:38,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:38,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:38,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:04:38,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:38,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:38,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193417856] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:38,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:38,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-31 17:04:38,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222489813] [2024-01-31 17:04:38,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:38,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:04:38,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:38,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:04:38,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:04:38,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:38,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 287 transitions, 4255 flow. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 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 17:04:38,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:38,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:38,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:40,621 INFO L124 PetriNetUnfolderBase]: 2394/4149 cut-off events. [2024-01-31 17:04:40,621 INFO L125 PetriNetUnfolderBase]: For 50710/50754 co-relation queries the response was YES. [2024-01-31 17:04:40,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27252 conditions, 4149 events. 2394/4149 cut-off events. For 50710/50754 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24815 event pairs, 102 based on Foata normal form. 144/4261 useless extension candidates. Maximal degree in co-relation 26834. Up to 1249 conditions per place. [2024-01-31 17:04:40,666 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 164 selfloop transitions, 412 changer transitions 7/588 dead transitions. [2024-01-31 17:04:40,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 588 transitions, 9092 flow [2024-01-31 17:04:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 17:04:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 17:04:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 350 transitions. [2024-01-31 17:04:40,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112808460634548 [2024-01-31 17:04:40,669 INFO L175 Difference]: Start difference. First operand has 144 places, 287 transitions, 4255 flow. Second operand 37 states and 350 transitions. [2024-01-31 17:04:40,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 588 transitions, 9092 flow [2024-01-31 17:04:40,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 588 transitions, 7839 flow, removed 547 selfloop flow, removed 3 redundant places. [2024-01-31 17:04:40,937 INFO L231 Difference]: Finished difference. Result has 194 places, 458 transitions, 7345 flow [2024-01-31 17:04:40,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3737, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7345, PETRI_PLACES=194, PETRI_TRANSITIONS=458} [2024-01-31 17:04:40,938 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 169 predicate places. [2024-01-31 17:04:40,939 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 458 transitions, 7345 flow [2024-01-31 17:04:40,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 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 17:04:40,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:40,939 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:40,957 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 17:04:41,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:41,155 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 17:04:41,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:41,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1882379621, now seen corresponding path program 6 times [2024-01-31 17:04:41,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:41,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681524218] [2024-01-31 17:04:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:41,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:41,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:41,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681524218] [2024-01-31 17:04:41,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681524218] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:41,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421926069] [2024-01-31 17:04:41,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:04:41,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:41,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:41,282 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 17:04:41,299 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 17:04:41,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:04:41,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:41,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:04:41,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:41,474 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 17:04:41,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:41,556 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 17:04:41,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421926069] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:41,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:41,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-31 17:04:41,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888766878] [2024-01-31 17:04:41,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:41,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:04:41,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:41,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:04:41,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:04:41,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:41,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 458 transitions, 7345 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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 17:04:41,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:41,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:41,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:43,458 INFO L124 PetriNetUnfolderBase]: 3020/5281 cut-off events. [2024-01-31 17:04:43,458 INFO L125 PetriNetUnfolderBase]: For 67260/67310 co-relation queries the response was YES. [2024-01-31 17:04:43,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35419 conditions, 5281 events. 3020/5281 cut-off events. For 67260/67310 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 33220 event pairs, 126 based on Foata normal form. 70/5317 useless extension candidates. Maximal degree in co-relation 34133. Up to 1005 conditions per place. [2024-01-31 17:04:43,517 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 190 selfloop transitions, 509 changer transitions 5/709 dead transitions. [2024-01-31 17:04:43,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 709 transitions, 11947 flow [2024-01-31 17:04:43,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-31 17:04:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-31 17:04:43,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 333 transitions. [2024-01-31 17:04:43,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43873517786561267 [2024-01-31 17:04:43,520 INFO L175 Difference]: Start difference. First operand has 194 places, 458 transitions, 7345 flow. Second operand 33 states and 333 transitions. [2024-01-31 17:04:43,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 709 transitions, 11947 flow [2024-01-31 17:04:43,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 709 transitions, 10926 flow, removed 309 selfloop flow, removed 8 redundant places. [2024-01-31 17:04:44,004 INFO L231 Difference]: Finished difference. Result has 226 places, 596 transitions, 10157 flow [2024-01-31 17:04:44,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6551, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10157, PETRI_PLACES=226, PETRI_TRANSITIONS=596} [2024-01-31 17:04:44,005 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 201 predicate places. [2024-01-31 17:04:44,005 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 596 transitions, 10157 flow [2024-01-31 17:04:44,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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 17:04:44,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:44,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:44,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 17:04:44,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:44,214 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 17:04:44,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:44,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1396034703, now seen corresponding path program 7 times [2024-01-31 17:04:44,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:44,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480693129] [2024-01-31 17:04:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:44,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:44,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:44,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480693129] [2024-01-31 17:04:44,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480693129] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:44,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66049850] [2024-01-31 17:04:44,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:04:44,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:44,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:44,351 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 17:04:44,371 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 17:04:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:44,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:04:44,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:44,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:44,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66049850] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:44,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:44,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-31 17:04:44,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939652300] [2024-01-31 17:04:44,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:44,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:04:44,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:44,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:04:44,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:04:44,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:44,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 596 transitions, 10157 flow. Second operand has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 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 17:04:44,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:44,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:44,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:46,452 INFO L124 PetriNetUnfolderBase]: 3373/5856 cut-off events. [2024-01-31 17:04:46,453 INFO L125 PetriNetUnfolderBase]: For 81224/81272 co-relation queries the response was YES. [2024-01-31 17:04:46,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41126 conditions, 5856 events. 3373/5856 cut-off events. For 81224/81272 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 36514 event pairs, 269 based on Foata normal form. 36/5862 useless extension candidates. Maximal degree in co-relation 40618. Up to 1339 conditions per place. [2024-01-31 17:04:46,520 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 239 selfloop transitions, 507 changer transitions 3/754 dead transitions. [2024-01-31 17:04:46,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 754 transitions, 13804 flow [2024-01-31 17:04:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 17:04:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 17:04:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 252 transitions. [2024-01-31 17:04:46,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4763705103969754 [2024-01-31 17:04:46,523 INFO L175 Difference]: Start difference. First operand has 226 places, 596 transitions, 10157 flow. Second operand 23 states and 252 transitions. [2024-01-31 17:04:46,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 754 transitions, 13804 flow [2024-01-31 17:04:47,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 754 transitions, 13526 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-01-31 17:04:47,250 INFO L231 Difference]: Finished difference. Result has 246 places, 661 transitions, 12462 flow [2024-01-31 17:04:47,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9782, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12462, PETRI_PLACES=246, PETRI_TRANSITIONS=661} [2024-01-31 17:04:47,251 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 221 predicate places. [2024-01-31 17:04:47,251 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 661 transitions, 12462 flow [2024-01-31 17:04:47,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 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 17:04:47,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:47,252 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:47,263 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 17:04:47,453 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,SelfDestructingSolverStorable13 [2024-01-31 17:04:47,453 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 17:04:47,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash -958695929, now seen corresponding path program 8 times [2024-01-31 17:04:47,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:47,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549022588] [2024-01-31 17:04:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:47,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:47,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:47,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549022588] [2024-01-31 17:04:47,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549022588] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:47,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421452066] [2024-01-31 17:04:47,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:04:47,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:47,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:47,597 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 17:04:47,615 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 17:04:47,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:47,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:47,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:04:47,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:47,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:47,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421452066] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:47,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:47,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-31 17:04:47,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832781229] [2024-01-31 17:04:47,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:47,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:04:47,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:04:47,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:04:47,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:47,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 661 transitions, 12462 flow. Second operand has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 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 17:04:47,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:47,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:47,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:50,154 INFO L124 PetriNetUnfolderBase]: 4279/7412 cut-off events. [2024-01-31 17:04:50,155 INFO L125 PetriNetUnfolderBase]: For 124706/124766 co-relation queries the response was YES. [2024-01-31 17:04:50,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55615 conditions, 7412 events. 4279/7412 cut-off events. For 124706/124766 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 48335 event pairs, 312 based on Foata normal form. 84/7430 useless extension candidates. Maximal degree in co-relation 54591. Up to 1363 conditions per place. [2024-01-31 17:04:50,241 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 248 selfloop transitions, 691 changer transitions 9/953 dead transitions. [2024-01-31 17:04:50,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 953 transitions, 19125 flow [2024-01-31 17:04:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:04:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:04:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 284 transitions. [2024-01-31 17:04:50,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409937888198758 [2024-01-31 17:04:50,243 INFO L175 Difference]: Start difference. First operand has 246 places, 661 transitions, 12462 flow. Second operand 28 states and 284 transitions. [2024-01-31 17:04:50,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 953 transitions, 19125 flow [2024-01-31 17:04:51,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 953 transitions, 18606 flow, removed 127 selfloop flow, removed 5 redundant places. [2024-01-31 17:04:51,513 INFO L231 Difference]: Finished difference. Result has 276 places, 866 transitions, 18662 flow [2024-01-31 17:04:51,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12057, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18662, PETRI_PLACES=276, PETRI_TRANSITIONS=866} [2024-01-31 17:04:51,514 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 251 predicate places. [2024-01-31 17:04:51,514 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 866 transitions, 18662 flow [2024-01-31 17:04:51,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 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 17:04:51,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:51,515 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:51,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-31 17:04:51,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 17:04:51,716 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 17:04:51,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:51,716 INFO L85 PathProgramCache]: Analyzing trace with hash 694361155, now seen corresponding path program 9 times [2024-01-31 17:04:51,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:51,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131024906] [2024-01-31 17:04:51,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:51,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:51,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:51,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131024906] [2024-01-31 17:04:51,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131024906] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:51,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032028310] [2024-01-31 17:04:51,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:04:51,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:51,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:51,855 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 17:04:51,875 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 17:04:51,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:04:51,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:51,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:04:51,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:52,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:52,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032028310] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:52,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:52,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:04:52,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912531291] [2024-01-31 17:04:52,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:52,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:04:52,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:04:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:04:52,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:52,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 866 transitions, 18662 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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 17:04:52,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:52,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:52,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:54,435 INFO L124 PetriNetUnfolderBase]: 4248/7371 cut-off events. [2024-01-31 17:04:54,435 INFO L125 PetriNetUnfolderBase]: For 150857/150925 co-relation queries the response was YES. [2024-01-31 17:04:54,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60476 conditions, 7371 events. 4248/7371 cut-off events. For 150857/150925 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 48388 event pairs, 678 based on Foata normal form. 46/7349 useless extension candidates. Maximal degree in co-relation 59495. Up to 3178 conditions per place. [2024-01-31 17:04:54,517 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 400 selfloop transitions, 501 changer transitions 3/909 dead transitions. [2024-01-31 17:04:54,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 909 transitions, 20783 flow [2024-01-31 17:04:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:04:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:04:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 149 transitions. [2024-01-31 17:04:54,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46273291925465837 [2024-01-31 17:04:54,519 INFO L175 Difference]: Start difference. First operand has 276 places, 866 transitions, 18662 flow. Second operand 14 states and 149 transitions. [2024-01-31 17:04:54,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 909 transitions, 20783 flow [2024-01-31 17:04:56,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 909 transitions, 19974 flow, removed 202 selfloop flow, removed 9 redundant places. [2024-01-31 17:04:56,541 INFO L231 Difference]: Finished difference. Result has 281 places, 866 transitions, 18878 flow [2024-01-31 17:04:56,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=17816, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18878, PETRI_PLACES=281, PETRI_TRANSITIONS=866} [2024-01-31 17:04:56,542 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 256 predicate places. [2024-01-31 17:04:56,542 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 866 transitions, 18878 flow [2024-01-31 17:04:56,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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 17:04:56,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:56,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:56,554 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 17:04:56,743 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,SelfDestructingSolverStorable15 [2024-01-31 17:04:56,743 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 17:04:56,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:56,744 INFO L85 PathProgramCache]: Analyzing trace with hash 775950799, now seen corresponding path program 10 times [2024-01-31 17:04:56,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:56,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814679441] [2024-01-31 17:04:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:56,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:56,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:56,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814679441] [2024-01-31 17:04:56,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814679441] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:56,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759491862] [2024-01-31 17:04:56,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:04:56,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:56,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:56,866 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 17:04:56,881 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 17:04:56,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:04:56,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:56,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:04:56,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:57,022 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 17:04:57,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:57,114 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 17:04:57,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759491862] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:57,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:57,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:04:57,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195042524] [2024-01-31 17:04:57,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:57,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:04:57,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:57,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:04:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:04:57,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:57,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 866 transitions, 18878 flow. Second operand has 15 states, 15 states have (on average 6.8) internal successors, (102), 15 states have internal predecessors, (102), 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 17:04:57,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:57,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:57,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:00,518 INFO L124 PetriNetUnfolderBase]: 5194/9137 cut-off events. [2024-01-31 17:05:00,518 INFO L125 PetriNetUnfolderBase]: For 185328/185398 co-relation queries the response was YES. [2024-01-31 17:05:00,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74259 conditions, 9137 events. 5194/9137 cut-off events. For 185328/185398 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 62971 event pairs, 411 based on Foata normal form. 134/9195 useless extension candidates. Maximal degree in co-relation 73160. Up to 1987 conditions per place. [2024-01-31 17:05:00,632 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 404 selfloop transitions, 843 changer transitions 1/1253 dead transitions. [2024-01-31 17:05:00,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1253 transitions, 28090 flow [2024-01-31 17:05:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-01-31 17:05:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-01-31 17:05:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 431 transitions. [2024-01-31 17:05:00,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435793731041456 [2024-01-31 17:05:00,634 INFO L175 Difference]: Start difference. First operand has 281 places, 866 transitions, 18878 flow. Second operand 43 states and 431 transitions. [2024-01-31 17:05:00,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1253 transitions, 28090 flow [2024-01-31 17:05:02,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1253 transitions, 27164 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-01-31 17:05:02,822 INFO L231 Difference]: Finished difference. Result has 327 places, 1092 transitions, 26433 flow [2024-01-31 17:05:02,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=18085, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=627, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=26433, PETRI_PLACES=327, PETRI_TRANSITIONS=1092} [2024-01-31 17:05:02,822 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 302 predicate places. [2024-01-31 17:05:02,822 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 1092 transitions, 26433 flow [2024-01-31 17:05:02,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.8) internal successors, (102), 15 states have internal predecessors, (102), 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 17:05:02,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:05:02,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:05:02,833 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 17:05:03,023 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,SelfDestructingSolverStorable16 [2024-01-31 17:05:03,023 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 17:05:03,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:05:03,024 INFO L85 PathProgramCache]: Analyzing trace with hash -655356037, now seen corresponding path program 11 times [2024-01-31 17:05:03,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:05:03,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102257896] [2024-01-31 17:05:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:05:03,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:05:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:03,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:03,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102257896] [2024-01-31 17:05:03,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102257896] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:03,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333834899] [2024-01-31 17:05:03,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:05:03,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:03,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:03,132 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 17:05:03,158 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 17:05:03,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 17:05:03,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:05:03,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:05:03,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:03,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:05:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:03,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333834899] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:05:03,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:05:03,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:05:03,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119613826] [2024-01-31 17:05:03,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:05:03,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:05:03,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:05:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:05:03,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:05:03,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:05:03,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 1092 transitions, 26433 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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 17:05:03,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:05:03,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:05:03,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:06,757 INFO L124 PetriNetUnfolderBase]: 5240/9213 cut-off events. [2024-01-31 17:05:06,757 INFO L125 PetriNetUnfolderBase]: For 225529/225599 co-relation queries the response was YES. [2024-01-31 17:05:06,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81195 conditions, 9213 events. 5240/9213 cut-off events. For 225529/225599 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 63752 event pairs, 1838 based on Foata normal form. 46/9158 useless extension candidates. Maximal degree in co-relation 79976. Up to 7128 conditions per place. [2024-01-31 17:05:06,876 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 985 selfloop transitions, 179 changer transitions 7/1176 dead transitions. [2024-01-31 17:05:06,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1176 transitions, 30177 flow [2024-01-31 17:05:06,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:05:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:05:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 130 transitions. [2024-01-31 17:05:06,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40372670807453415 [2024-01-31 17:05:06,878 INFO L175 Difference]: Start difference. First operand has 327 places, 1092 transitions, 26433 flow. Second operand 14 states and 130 transitions. [2024-01-31 17:05:06,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1176 transitions, 30177 flow [2024-01-31 17:05:10,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1176 transitions, 29785 flow, removed 58 selfloop flow, removed 12 redundant places. [2024-01-31 17:05:10,292 INFO L231 Difference]: Finished difference. Result has 334 places, 1120 transitions, 27336 flow [2024-01-31 17:05:10,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26049, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1092, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=27336, PETRI_PLACES=334, PETRI_TRANSITIONS=1120} [2024-01-31 17:05:10,293 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 309 predicate places. [2024-01-31 17:05:10,293 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 1120 transitions, 27336 flow [2024-01-31 17:05:10,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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 17:05:10,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:05:10,294 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:05:10,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 17:05:10,494 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,SelfDestructingSolverStorable17 [2024-01-31 17:05:10,495 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 17:05:10,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:05:10,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1563419941, now seen corresponding path program 12 times [2024-01-31 17:05:10,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:05:10,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481066692] [2024-01-31 17:05:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:05:10,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:05:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:10,643 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 17:05:10,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:10,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481066692] [2024-01-31 17:05:10,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481066692] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:10,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412827287] [2024-01-31 17:05:10,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:05:10,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:10,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:10,646 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 17:05:10,666 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 17:05:10,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 17:05:10,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:05:10,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:05:10,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:10,772 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 17:05:10,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:05:10,858 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 17:05:10,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412827287] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:05:10,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:05:10,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-01-31 17:05:10,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44928177] [2024-01-31 17:05:10,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:05:10,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:05:10,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:05:10,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:05:10,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:05:10,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:05:10,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 1120 transitions, 27336 flow. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 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 17:05:10,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:05:10,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:05:10,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:16,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-31 17:05:19,760 INFO L124 PetriNetUnfolderBase]: 6933/12254 cut-off events. [2024-01-31 17:05:19,761 INFO L125 PetriNetUnfolderBase]: For 309861/309953 co-relation queries the response was YES. [2024-01-31 17:05:19,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108400 conditions, 12254 events. 6933/12254 cut-off events. For 309861/309953 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 88878 event pairs, 1015 based on Foata normal form. 164/12317 useless extension candidates. Maximal degree in co-relation 107276. Up to 4008 conditions per place. [2024-01-31 17:05:19,912 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 891 selfloop transitions, 771 changer transitions 1/1668 dead transitions. [2024-01-31 17:05:19,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1668 transitions, 42154 flow [2024-01-31 17:05:19,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 17:05:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 17:05:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 392 transitions. [2024-01-31 17:05:19,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448512585812357 [2024-01-31 17:05:19,914 INFO L175 Difference]: Start difference. First operand has 334 places, 1120 transitions, 27336 flow. Second operand 38 states and 392 transitions. [2024-01-31 17:05:19,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1668 transitions, 42154 flow [2024-01-31 17:05:25,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1668 transitions, 41967 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-01-31 17:05:25,976 INFO L231 Difference]: Finished difference. Result has 379 places, 1422 transitions, 37934 flow [2024-01-31 17:05:25,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=27061, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=37934, PETRI_PLACES=379, PETRI_TRANSITIONS=1422} [2024-01-31 17:05:25,978 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 354 predicate places. [2024-01-31 17:05:25,978 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1422 transitions, 37934 flow [2024-01-31 17:05:25,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 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 17:05:25,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:05:25,978 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:05:25,991 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 17:05:26,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:26,179 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 17:05:26,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:05:26,179 INFO L85 PathProgramCache]: Analyzing trace with hash 538279461, now seen corresponding path program 13 times [2024-01-31 17:05:26,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:05:26,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379427166] [2024-01-31 17:05:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:05:26,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:05:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:26,310 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 17:05:26,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379427166] [2024-01-31 17:05:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379427166] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520212545] [2024-01-31 17:05:26,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:05:26,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:26,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:26,312 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 17:05:26,313 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 17:05:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:26,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:05:26,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:26,458 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 17:05:26,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:05:26,552 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 17:05:26,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520212545] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:05:26,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:05:26,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:05:26,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549701957] [2024-01-31 17:05:26,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:05:26,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:05:26,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:05:26,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:05:26,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:05:26,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:05:26,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1422 transitions, 37934 flow. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 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 17:05:26,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:05:26,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:05:26,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:32,799 INFO L124 PetriNetUnfolderBase]: 7598/13357 cut-off events. [2024-01-31 17:05:32,799 INFO L125 PetriNetUnfolderBase]: For 409307/409405 co-relation queries the response was YES. [2024-01-31 17:05:32,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127341 conditions, 13357 events. 7598/13357 cut-off events. For 409307/409405 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 98112 event pairs, 994 based on Foata normal form. 98/13322 useless extension candidates. Maximal degree in co-relation 126176. Up to 5251 conditions per place. [2024-01-31 17:05:33,034 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 655 selfloop transitions, 971 changer transitions 7/1638 dead transitions. [2024-01-31 17:05:33,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1638 transitions, 45907 flow [2024-01-31 17:05:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 17:05:33,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 17:05:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 207 transitions. [2024-01-31 17:05:33,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-01-31 17:05:33,035 INFO L175 Difference]: Start difference. First operand has 379 places, 1422 transitions, 37934 flow. Second operand 20 states and 207 transitions. [2024-01-31 17:05:33,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1638 transitions, 45907 flow [2024-01-31 17:05:41,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1638 transitions, 45296 flow, removed 233 selfloop flow, removed 5 redundant places. [2024-01-31 17:05:41,493 INFO L231 Difference]: Finished difference. Result has 401 places, 1567 transitions, 44646 flow [2024-01-31 17:05:41,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=37281, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=836, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=44646, PETRI_PLACES=401, PETRI_TRANSITIONS=1567} [2024-01-31 17:05:41,496 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 376 predicate places. [2024-01-31 17:05:41,496 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1567 transitions, 44646 flow [2024-01-31 17:05:41,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 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 17:05:41,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:05:41,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:05:41,507 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 17:05:41,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:41,697 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 17:05:41,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:05:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash -957272641, now seen corresponding path program 14 times [2024-01-31 17:05:41,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:05:41,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473748601] [2024-01-31 17:05:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:05:41,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:05:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:41,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:41,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473748601] [2024-01-31 17:05:41,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473748601] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:41,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932244984] [2024-01-31 17:05:41,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:05:41,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:41,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:41,832 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 17:05:41,834 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 17:05:41,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:05:41,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:05:41,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:05:41,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:41,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:05:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:42,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932244984] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:05:42,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:05:42,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-31 17:05:42,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389718475] [2024-01-31 17:05:42,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:05:42,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:05:42,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:05:42,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:05:42,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:05:42,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:05:42,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1567 transitions, 44646 flow. Second operand has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 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 17:05:42,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:05:42,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:05:42,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:50,365 INFO L124 PetriNetUnfolderBase]: 9386/16325 cut-off events. [2024-01-31 17:05:50,365 INFO L125 PetriNetUnfolderBase]: For 580108/580256 co-relation queries the response was YES. [2024-01-31 17:05:50,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165006 conditions, 16325 events. 9386/16325 cut-off events. For 580108/580256 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 121979 event pairs, 2326 based on Foata normal form. 92/16282 useless extension candidates. Maximal degree in co-relation 163508. Up to 9904 conditions per place. [2024-01-31 17:05:50,976 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1188 selfloop transitions, 857 changer transitions 0/2050 dead transitions. [2024-01-31 17:05:50,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 2050 transitions, 61468 flow [2024-01-31 17:05:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 17:05:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 17:05:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 228 transitions. [2024-01-31 17:05:50,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505928853754941 [2024-01-31 17:05:50,977 INFO L175 Difference]: Start difference. First operand has 401 places, 1567 transitions, 44646 flow. Second operand 22 states and 228 transitions. [2024-01-31 17:05:50,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 2050 transitions, 61468 flow [2024-01-31 17:06:02,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 2050 transitions, 60987 flow, removed 110 selfloop flow, removed 7 redundant places. [2024-01-31 17:06:02,254 INFO L231 Difference]: Finished difference. Result has 423 places, 1953 transitions, 58541 flow [2024-01-31 17:06:02,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44185, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=917, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=58541, PETRI_PLACES=423, PETRI_TRANSITIONS=1953} [2024-01-31 17:06:02,255 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 398 predicate places. [2024-01-31 17:06:02,255 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 1953 transitions, 58541 flow [2024-01-31 17:06:02,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 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 17:06:02,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:06:02,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:06:02,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-31 17:06:02,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:06:02,470 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 17:06:02,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:06:02,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1606979747, now seen corresponding path program 15 times [2024-01-31 17:06:02,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:06:02,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887329659] [2024-01-31 17:06:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:06:02,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:06:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:06:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:02,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:06:02,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887329659] [2024-01-31 17:06:02,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887329659] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:06:02,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292199201] [2024-01-31 17:06:02,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:06:02,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:06:02,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:06:02,596 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 17:06:02,597 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 17:06:02,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:06:02,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:06:02,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:06:02,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:06:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:02,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:06:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:02,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292199201] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:06:02,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:06:02,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-31 17:06:02,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966894235] [2024-01-31 17:06:02,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:06:02,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:06:02,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:06:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:06:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:06:02,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:06:02,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 1953 transitions, 58541 flow. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 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 17:06:02,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:06:02,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:06:02,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:06:11,136 INFO L124 PetriNetUnfolderBase]: 9389/16330 cut-off events. [2024-01-31 17:06:11,136 INFO L125 PetriNetUnfolderBase]: For 622914/623056 co-relation queries the response was YES. [2024-01-31 17:06:11,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171637 conditions, 16330 events. 9389/16330 cut-off events. For 622914/623056 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 122180 event pairs, 2665 based on Foata normal form. 86/16267 useless extension candidates. Maximal degree in co-relation 171130. Up to 11093 conditions per place. [2024-01-31 17:06:11,344 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 1392 selfloop transitions, 600 changer transitions 3/2000 dead transitions. [2024-01-31 17:06:11,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 2000 transitions, 63124 flow [2024-01-31 17:06:11,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:06:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:06:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 142 transitions. [2024-01-31 17:06:11,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409937888198758 [2024-01-31 17:06:11,348 INFO L175 Difference]: Start difference. First operand has 423 places, 1953 transitions, 58541 flow. Second operand 14 states and 142 transitions. [2024-01-31 17:06:11,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 2000 transitions, 63124 flow [2024-01-31 17:06:23,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 2000 transitions, 62420 flow, removed 225 selfloop flow, removed 9 redundant places. [2024-01-31 17:06:23,635 INFO L231 Difference]: Finished difference. Result has 429 places, 1954 transitions, 59103 flow [2024-01-31 17:06:23,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=57802, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=59103, PETRI_PLACES=429, PETRI_TRANSITIONS=1954} [2024-01-31 17:06:23,637 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 404 predicate places. [2024-01-31 17:06:23,637 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 1954 transitions, 59103 flow [2024-01-31 17:06:23,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 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 17:06:23,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:06:23,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:06:23,649 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 17:06:23,839 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,SelfDestructingSolverStorable21 [2024-01-31 17:06:23,839 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 17:06:23,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:06:23,840 INFO L85 PathProgramCache]: Analyzing trace with hash -575013821, now seen corresponding path program 16 times [2024-01-31 17:06:23,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:06:23,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821239467] [2024-01-31 17:06:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:06:23,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:06:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:06:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:23,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:06:23,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821239467] [2024-01-31 17:06:23,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821239467] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:06:23,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061745083] [2024-01-31 17:06:23,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:06:23,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:06:23,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:06:23,960 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 17:06:23,965 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 17:06:24,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:06:24,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:06:24,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:06:24,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:06:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:24,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:06:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:24,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061745083] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:06:24,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:06:24,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-31 17:06:24,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955429115] [2024-01-31 17:06:24,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:06:24,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:06:24,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:06:24,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:06:24,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:06:24,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:06:24,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 1954 transitions, 59103 flow. Second operand has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 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 17:06:24,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:06:24,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:06:24,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:06:30,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-31 17:06:44,882 INFO L124 PetriNetUnfolderBase]: 13466/23299 cut-off events. [2024-01-31 17:06:44,882 INFO L125 PetriNetUnfolderBase]: For 917464/917698 co-relation queries the response was YES. [2024-01-31 17:06:45,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247992 conditions, 23299 events. 13466/23299 cut-off events. For 917464/917698 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 180545 event pairs, 1200 based on Foata normal form. 274/23340 useless extension candidates. Maximal degree in co-relation 247332. Up to 5642 conditions per place.