./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-figure1-alt.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-figure1-alt.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 17:03:58,792 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:03:58,854 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:03:58,858 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:03:58,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:03:58,890 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:03:58,890 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:03:58,890 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:03:58,891 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:03:58,894 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:03:58,894 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:03:58,894 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:03:58,895 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:03:58,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:03:58,896 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:03:58,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:03:58,897 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:03:58,897 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:03:58,897 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:03:58,897 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:03:58,897 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:03:58,898 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:03:58,898 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:03:58,898 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:03:58,898 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:03:58,899 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:03:58,899 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:03:58,899 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:03:58,899 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:03:58,900 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:03:58,900 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:03:58,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:03:58,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:03:58,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:03:58,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:03:58,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:03:58,901 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:03:58,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:03:58,902 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:03:58,902 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:03:58,902 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:03:58,902 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:03:58,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:03:58,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:03:59,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:03:59,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:03:59,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:03:59,188 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:03:59,189 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:03:59,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2024-01-31 17:04:00,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:04:00,276 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:04:00,277 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2024-01-31 17:04:00,285 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53fe9c556/17c9b2d76b1e4317845a7facd9514935/FLAG50e642c8b [2024-01-31 17:04:00,301 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53fe9c556/17c9b2d76b1e4317845a7facd9514935 [2024-01-31 17:04:00,303 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:04:00,303 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:04:00,305 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-figure1-alt.wvr.yml/witness.yml [2024-01-31 17:04:00,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:04:00,395 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:04:00,396 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:04:00,396 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:04:00,399 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:04:00,400 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:04:00" (1/2) ... [2024-01-31 17:04:00,401 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47392aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:04:00, skipping insertion in model container [2024-01-31 17:04:00,401 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:04:00" (1/2) ... [2024-01-31 17:04:00,403 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b27770b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:04:00, skipping insertion in model container [2024-01-31 17:04:00,403 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:04:00" (2/2) ... [2024-01-31 17:04:00,403 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47392aa2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:00, skipping insertion in model container [2024-01-31 17:04:00,403 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:04:00" (2/2) ... [2024-01-31 17:04:00,404 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:04:00,425 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:04:00,441 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:04:00,591 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-figure1-alt.wvr.c[2113,2126] [2024-01-31 17:04:00,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:04:00,601 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:04:00,617 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-figure1-alt.wvr.c[2113,2126] [2024-01-31 17:04:00,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:04:00,634 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:04:00,634 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:00 WrapperNode [2024-01-31 17:04:00,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:04:00,635 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:04:00,636 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:04:00,636 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:04:00,641 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 05:04:00" (1/1) ... [2024-01-31 17:04:00,647 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 05:04:00" (1/1) ... [2024-01-31 17:04:00,670 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2024-01-31 17:04:00,671 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:04:00,671 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:04:00,671 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:04:00,672 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:04:00,680 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 05:04:00" (1/1) ... [2024-01-31 17:04:00,680 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 05:04:00" (1/1) ... [2024-01-31 17:04:00,686 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 05:04:00" (1/1) ... [2024-01-31 17:04:00,711 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 17:04:00,712 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 05:04:00" (1/1) ... [2024-01-31 17:04:00,713 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 05:04:00" (1/1) ... [2024-01-31 17:04:00,717 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 05:04:00" (1/1) ... [2024-01-31 17:04:00,724 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 05:04:00" (1/1) ... [2024-01-31 17:04:00,725 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 05:04:00" (1/1) ... [2024-01-31 17:04:00,730 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 05:04:00" (1/1) ... [2024-01-31 17:04:00,732 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:04:00,733 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:04:00,733 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:04:00,733 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:04:00,734 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 05:04:00" (1/1) ... [2024-01-31 17:04:00,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:04:00,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:00,765 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 17:04:00,772 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 17:04:00,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:04:00,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:04:00,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:04:00,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:04:00,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:04:00,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:04:00,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:04:00,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:04:00,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:04:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:04:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:04:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:04:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:04:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:04:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:04:00,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:04:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:04:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:04:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:04:00,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:04:00,801 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 17:04:00,937 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:04:00,939 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:04:01,103 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:04:01,103 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:04:01,243 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:04:01,243 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 17:04:01,245 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:04:01 BoogieIcfgContainer [2024-01-31 17:04:01,245 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:04:01,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:04:01,248 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:04:01,250 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:04:01,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:04:00" (1/4) ... [2024-01-31 17:04:01,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1af21f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:04:01, skipping insertion in model container [2024-01-31 17:04:01,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:04:00" (2/4) ... [2024-01-31 17:04:01,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1af21f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:04:01, skipping insertion in model container [2024-01-31 17:04:01,251 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 05:04:00" (3/4) ... [2024-01-31 17:04:01,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1af21f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:04:01, skipping insertion in model container [2024-01-31 17:04:01,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:04:01" (4/4) ... [2024-01-31 17:04:01,253 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2024-01-31 17:04:01,265 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:04:01,265 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:04:01,265 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:04:01,301 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:04:01,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2024-01-31 17:04:01,364 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-01-31 17:04:01,365 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:04:01,367 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 20 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 17:04:01,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2024-01-31 17:04:01,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2024-01-31 17:04:01,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:04:01,385 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;@6b8b181a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:04:01,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:04:01,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:04:01,397 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-01-31 17:04:01,397 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:04:01,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:01,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:01,399 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 17:04:01,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:01,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1109461626, now seen corresponding path program 1 times [2024-01-31 17:04:01,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:01,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101040682] [2024-01-31 17:04:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:01,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:01,988 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 17:04:01,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:01,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101040682] [2024-01-31 17:04:01,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101040682] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:01,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:01,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:04:01,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639194928] [2024-01-31 17:04:01,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:01,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:04:02,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:02,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:04:02,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:04:02,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-31 17:04:02,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 17:04:02,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:02,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-31 17:04:02,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:02,201 INFO L124 PetriNetUnfolderBase]: 84/187 cut-off events. [2024-01-31 17:04:02,201 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-01-31 17:04:02,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 187 events. 84/187 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 680 event pairs, 24 based on Foata normal form. 9/195 useless extension candidates. Maximal degree in co-relation 289. Up to 101 conditions per place. [2024-01-31 17:04:02,207 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 34 selfloop transitions, 8 changer transitions 5/50 dead transitions. [2024-01-31 17:04:02,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 50 transitions, 227 flow [2024-01-31 17:04:02,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:04:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:04:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-01-31 17:04:02,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-01-31 17:04:02,218 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 7 states and 84 transitions. [2024-01-31 17:04:02,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 50 transitions, 227 flow [2024-01-31 17:04:02,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 50 transitions, 205 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:04:02,222 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 99 flow [2024-01-31 17:04:02,224 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2024-01-31 17:04:02,226 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2024-01-31 17:04:02,226 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 99 flow [2024-01-31 17:04:02,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 17:04:02,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:02,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:02,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:04:02,228 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 17:04:02,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:02,228 INFO L85 PathProgramCache]: Analyzing trace with hash 209559052, now seen corresponding path program 2 times [2024-01-31 17:04:02,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:02,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793931030] [2024-01-31 17:04:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:02,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:02,428 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 17:04:02,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:02,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793931030] [2024-01-31 17:04:02,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793931030] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:02,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:02,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:04:02,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031824162] [2024-01-31 17:04:02,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:02,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:04:02,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:02,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:04:02,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:04:02,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-31 17:04:02,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 99 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 17:04:02,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:02,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-31 17:04:02,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:02,570 INFO L124 PetriNetUnfolderBase]: 85/195 cut-off events. [2024-01-31 17:04:02,570 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-01-31 17:04:02,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 195 events. 85/195 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 749 event pairs, 20 based on Foata normal form. 1/196 useless extension candidates. Maximal degree in co-relation 488. Up to 101 conditions per place. [2024-01-31 17:04:02,572 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 31 selfloop transitions, 8 changer transitions 11/53 dead transitions. [2024-01-31 17:04:02,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 53 transitions, 283 flow [2024-01-31 17:04:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:04:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:04:02,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-01-31 17:04:02,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093167701863354 [2024-01-31 17:04:02,573 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 99 flow. Second operand 7 states and 82 transitions. [2024-01-31 17:04:02,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 53 transitions, 283 flow [2024-01-31 17:04:02,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 279 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-31 17:04:02,576 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 133 flow [2024-01-31 17:04:02,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=133, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2024-01-31 17:04:02,577 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2024-01-31 17:04:02,578 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 133 flow [2024-01-31 17:04:02,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 17:04:02,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:02,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:02,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:04:02,580 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 17:04:02,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:02,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1557473824, now seen corresponding path program 3 times [2024-01-31 17:04:02,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:02,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264865184] [2024-01-31 17:04:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:02,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:02,774 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 17:04:02,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:02,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264865184] [2024-01-31 17:04:02,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264865184] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:02,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:02,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:04:02,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166681783] [2024-01-31 17:04:02,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:02,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:04:02,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:04:02,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:04:02,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-31 17:04:02,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 133 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 17:04:02,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:02,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-31 17:04:02,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:02,898 INFO L124 PetriNetUnfolderBase]: 86/190 cut-off events. [2024-01-31 17:04:02,898 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2024-01-31 17:04:02,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 190 events. 86/190 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 686 event pairs, 16 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 569. Up to 105 conditions per place. [2024-01-31 17:04:02,903 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 31 selfloop transitions, 12 changer transitions 5/51 dead transitions. [2024-01-31 17:04:02,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 324 flow [2024-01-31 17:04:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:04:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:04:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-01-31 17:04:02,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031055900621118 [2024-01-31 17:04:02,907 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 133 flow. Second operand 7 states and 81 transitions. [2024-01-31 17:04:02,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 324 flow [2024-01-31 17:04:02,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 303 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-01-31 17:04:02,915 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 196 flow [2024-01-31 17:04:02,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=196, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-01-31 17:04:02,916 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 19 predicate places. [2024-01-31 17:04:02,917 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 196 flow [2024-01-31 17:04:02,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 17:04:02,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:02,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:02,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:04:02,918 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 17:04:02,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:02,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1096301610, now seen corresponding path program 4 times [2024-01-31 17:04:02,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:02,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751960006] [2024-01-31 17:04:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:02,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:03,055 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 17:04:03,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:03,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751960006] [2024-01-31 17:04:03,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751960006] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:03,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:03,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:04:03,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114864877] [2024-01-31 17:04:03,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:03,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:04:03,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:03,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:04:03,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:04:03,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-31 17:04:03,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 17:04:03,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:03,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-31 17:04:03,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:03,158 INFO L124 PetriNetUnfolderBase]: 84/192 cut-off events. [2024-01-31 17:04:03,158 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2024-01-31 17:04:03,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 192 events. 84/192 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 710 event pairs, 27 based on Foata normal form. 1/193 useless extension candidates. Maximal degree in co-relation 601. Up to 105 conditions per place. [2024-01-31 17:04:03,159 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 30 selfloop transitions, 14 changer transitions 6/53 dead transitions. [2024-01-31 17:04:03,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 380 flow [2024-01-31 17:04:03,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:04:03,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:04:03,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-01-31 17:04:03,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968944099378882 [2024-01-31 17:04:03,160 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 196 flow. Second operand 7 states and 80 transitions. [2024-01-31 17:04:03,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 380 flow [2024-01-31 17:04:03,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-01-31 17:04:03,162 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 243 flow [2024-01-31 17:04:03,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2024-01-31 17:04:03,163 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2024-01-31 17:04:03,163 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 243 flow [2024-01-31 17:04:03,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 17:04:03,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:03,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:03,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:04:03,164 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 17:04:03,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:03,164 INFO L85 PathProgramCache]: Analyzing trace with hash -971384504, now seen corresponding path program 5 times [2024-01-31 17:04:03,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:03,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570387178] [2024-01-31 17:04:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:03,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:03,317 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 17:04:03,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:03,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570387178] [2024-01-31 17:04:03,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570387178] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:03,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:03,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:04:03,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718353332] [2024-01-31 17:04:03,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:03,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:04:03,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:03,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:04:03,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:04:03,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-31 17:04:03,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 17:04:03,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:03,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-31 17:04:03,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:03,405 INFO L124 PetriNetUnfolderBase]: 82/187 cut-off events. [2024-01-31 17:04:03,405 INFO L125 PetriNetUnfolderBase]: For 350/350 co-relation queries the response was YES. [2024-01-31 17:04:03,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 187 events. 82/187 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 691 event pairs, 24 based on Foata normal form. 1/188 useless extension candidates. Maximal degree in co-relation 618. Up to 105 conditions per place. [2024-01-31 17:04:03,407 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 29 selfloop transitions, 13 changer transitions 9/54 dead transitions. [2024-01-31 17:04:03,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 400 flow [2024-01-31 17:04:03,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:04:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:04:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-01-31 17:04:03,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031055900621118 [2024-01-31 17:04:03,408 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 243 flow. Second operand 7 states and 81 transitions. [2024-01-31 17:04:03,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 400 flow [2024-01-31 17:04:03,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 343 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-01-31 17:04:03,410 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 213 flow [2024-01-31 17:04:03,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2024-01-31 17:04:03,411 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 22 predicate places. [2024-01-31 17:04:03,411 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 213 flow [2024-01-31 17:04:03,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 17:04:03,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:03,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:03,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 17:04:03,412 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 17:04:03,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:03,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1667628514, now seen corresponding path program 6 times [2024-01-31 17:04:03,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:03,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607786638] [2024-01-31 17:04:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:03,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:03,533 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 17:04:03,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:03,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607786638] [2024-01-31 17:04:03,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607786638] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:03,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:03,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:04:03,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639759961] [2024-01-31 17:04:03,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:03,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:04:03,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:03,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:04:03,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:04:03,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-31 17:04:03,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 213 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 17:04:03,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:03,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-31 17:04:03,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:03,616 INFO L124 PetriNetUnfolderBase]: 78/171 cut-off events. [2024-01-31 17:04:03,616 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2024-01-31 17:04:03,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 171 events. 78/171 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 590 event pairs, 25 based on Foata normal form. 1/171 useless extension candidates. Maximal degree in co-relation 544. Up to 105 conditions per place. [2024-01-31 17:04:03,618 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 22 selfloop transitions, 13 changer transitions 9/47 dead transitions. [2024-01-31 17:04:03,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 340 flow [2024-01-31 17:04:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:04:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:04:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2024-01-31 17:04:03,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45962732919254656 [2024-01-31 17:04:03,620 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 213 flow. Second operand 7 states and 74 transitions. [2024-01-31 17:04:03,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 340 flow [2024-01-31 17:04:03,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 308 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-01-31 17:04:03,622 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 202 flow [2024-01-31 17:04:03,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2024-01-31 17:04:03,624 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 21 predicate places. [2024-01-31 17:04:03,624 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 202 flow [2024-01-31 17:04:03,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 17:04:03,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:03,625 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 17:04:03,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 17:04:03,625 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 17:04:03,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:03,626 INFO L85 PathProgramCache]: Analyzing trace with hash -894668948, now seen corresponding path program 1 times [2024-01-31 17:04:03,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:03,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413732878] [2024-01-31 17:04:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:03,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:03,829 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 17:04:03,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:03,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413732878] [2024-01-31 17:04:03,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413732878] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:03,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402152888] [2024-01-31 17:04:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:03,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:03,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:03,832 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 17:04:03,842 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 17:04:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:03,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:03,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:04,074 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 17:04:04,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:04,220 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 17:04:04,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402152888] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:04,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:04,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:04:04,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751855008] [2024-01-31 17:04:04,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:04,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:04:04,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:04:04,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:04:04,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:04,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 202 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 17:04:04,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:04,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:04,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:05,076 INFO L124 PetriNetUnfolderBase]: 397/763 cut-off events. [2024-01-31 17:04:05,076 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-01-31 17:04:05,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 763 events. 397/763 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3520 event pairs, 16 based on Foata normal form. 20/783 useless extension candidates. Maximal degree in co-relation 1963. Up to 157 conditions per place. [2024-01-31 17:04:05,080 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 143 selfloop transitions, 78 changer transitions 21/243 dead transitions. [2024-01-31 17:04:05,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 243 transitions, 1317 flow [2024-01-31 17:04:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-31 17:04:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-31 17:04:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 357 transitions. [2024-01-31 17:04:05,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38804347826086955 [2024-01-31 17:04:05,083 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 202 flow. Second operand 40 states and 357 transitions. [2024-01-31 17:04:05,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 243 transitions, 1317 flow [2024-01-31 17:04:05,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 243 transitions, 1265 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-01-31 17:04:05,087 INFO L231 Difference]: Finished difference. Result has 84 places, 105 transitions, 615 flow [2024-01-31 17:04:05,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=615, PETRI_PLACES=84, PETRI_TRANSITIONS=105} [2024-01-31 17:04:05,087 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 59 predicate places. [2024-01-31 17:04:05,088 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 105 transitions, 615 flow [2024-01-31 17:04:05,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 17:04:05,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:05,088 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 17:04:05,102 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 17:04:05,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:05,300 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 17:04:05,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash 465028364, now seen corresponding path program 2 times [2024-01-31 17:04:05,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:05,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341802228] [2024-01-31 17:04:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:05,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:05,452 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 17:04:05,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:05,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341802228] [2024-01-31 17:04:05,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341802228] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:05,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780590793] [2024-01-31 17:04:05,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:04:05,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:05,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:05,454 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 17:04:05,461 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 17:04:05,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:05,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:05,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:05,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:05,638 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 17:04:05,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:05,769 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 17:04:05,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780590793] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:05,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:05,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:04:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168756077] [2024-01-31 17:04:05,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:04:05,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:04:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:04:05,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:05,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 105 transitions, 615 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 17:04:05,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:05,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:05,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:06,628 INFO L124 PetriNetUnfolderBase]: 502/965 cut-off events. [2024-01-31 17:04:06,628 INFO L125 PetriNetUnfolderBase]: For 1020/1020 co-relation queries the response was YES. [2024-01-31 17:04:06,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 965 events. 502/965 cut-off events. For 1020/1020 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4836 event pairs, 39 based on Foata normal form. 2/967 useless extension candidates. Maximal degree in co-relation 3201. Up to 450 conditions per place. [2024-01-31 17:04:06,634 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 119 selfloop transitions, 119 changer transitions 12/251 dead transitions. [2024-01-31 17:04:06,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 251 transitions, 1746 flow [2024-01-31 17:04:06,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 17:04:06,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 17:04:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 290 transitions. [2024-01-31 17:04:06,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36024844720496896 [2024-01-31 17:04:06,636 INFO L175 Difference]: Start difference. First operand has 84 places, 105 transitions, 615 flow. Second operand 35 states and 290 transitions. [2024-01-31 17:04:06,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 251 transitions, 1746 flow [2024-01-31 17:04:06,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 251 transitions, 1603 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-01-31 17:04:06,648 INFO L231 Difference]: Finished difference. Result has 120 places, 160 transitions, 1172 flow [2024-01-31 17:04:06,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1172, PETRI_PLACES=120, PETRI_TRANSITIONS=160} [2024-01-31 17:04:06,649 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 95 predicate places. [2024-01-31 17:04:06,649 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 160 transitions, 1172 flow [2024-01-31 17:04:06,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 17:04:06,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:06,650 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 17:04:06,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:04:06,859 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 17:04:06,859 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 17:04:06,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:06,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1449373200, now seen corresponding path program 3 times [2024-01-31 17:04:06,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:06,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284210233] [2024-01-31 17:04:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:06,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:07,005 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 17:04:07,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:07,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284210233] [2024-01-31 17:04:07,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284210233] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:07,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845791306] [2024-01-31 17:04:07,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:04:07,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:07,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:07,021 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 17:04:07,029 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 17:04:07,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:04:07,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:07,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:07,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:07,244 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 17:04:07,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:07,378 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 17:04:07,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845791306] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:07,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:07,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:04:07,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121822267] [2024-01-31 17:04:07,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:07,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:04:07,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:04:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:04:07,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:07,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 160 transitions, 1172 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 17:04:07,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:07,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:07,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:09,012 INFO L124 PetriNetUnfolderBase]: 794/1531 cut-off events. [2024-01-31 17:04:09,012 INFO L125 PetriNetUnfolderBase]: For 3275/3275 co-relation queries the response was YES. [2024-01-31 17:04:09,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6048 conditions, 1531 events. 794/1531 cut-off events. For 3275/3275 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8662 event pairs, 27 based on Foata normal form. 2/1531 useless extension candidates. Maximal degree in co-relation 6012. Up to 254 conditions per place. [2024-01-31 17:04:09,023 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 203 selfloop transitions, 242 changer transitions 14/460 dead transitions. [2024-01-31 17:04:09,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 460 transitions, 3671 flow [2024-01-31 17:04:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-01-31 17:04:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-01-31 17:04:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 532 transitions. [2024-01-31 17:04:09,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36141304347826086 [2024-01-31 17:04:09,026 INFO L175 Difference]: Start difference. First operand has 120 places, 160 transitions, 1172 flow. Second operand 64 states and 532 transitions. [2024-01-31 17:04:09,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 460 transitions, 3671 flow [2024-01-31 17:04:09,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 460 transitions, 3594 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-01-31 17:04:09,048 INFO L231 Difference]: Finished difference. Result has 192 places, 281 transitions, 2692 flow [2024-01-31 17:04:09,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=2692, PETRI_PLACES=192, PETRI_TRANSITIONS=281} [2024-01-31 17:04:09,049 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 167 predicate places. [2024-01-31 17:04:09,049 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 281 transitions, 2692 flow [2024-01-31 17:04:09,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 17:04:09,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:09,049 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 17:04:09,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-31 17:04:09,260 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 17:04:09,260 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 17:04:09,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:09,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1625138926, now seen corresponding path program 4 times [2024-01-31 17:04:09,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:09,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471453842] [2024-01-31 17:04:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:09,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:09,398 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 17:04:09,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:09,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471453842] [2024-01-31 17:04:09,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471453842] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:09,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132366827] [2024-01-31 17:04:09,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:04:09,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:09,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:09,400 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 17:04:09,416 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 17:04:09,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:04:09,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:09,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:09,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:09,616 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 17:04:09,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:09,761 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 17:04:09,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132366827] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:09,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:09,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:04:09,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294489554] [2024-01-31 17:04:09,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:09,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:04:09,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:09,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:04:09,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:04:09,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:09,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 281 transitions, 2692 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:09,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:09,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:09,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:11,580 INFO L124 PetriNetUnfolderBase]: 1075/2020 cut-off events. [2024-01-31 17:04:11,580 INFO L125 PetriNetUnfolderBase]: For 16010/16010 co-relation queries the response was YES. [2024-01-31 17:04:11,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10904 conditions, 2020 events. 1075/2020 cut-off events. For 16010/16010 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11714 event pairs, 30 based on Foata normal form. 2/2018 useless extension candidates. Maximal degree in co-relation 10547. Up to 367 conditions per place. [2024-01-31 17:04:11,597 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 211 selfloop transitions, 335 changer transitions 14/561 dead transitions. [2024-01-31 17:04:11,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 561 transitions, 5834 flow [2024-01-31 17:04:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-01-31 17:04:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-01-31 17:04:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 547 transitions. [2024-01-31 17:04:11,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37160326086956524 [2024-01-31 17:04:11,601 INFO L175 Difference]: Start difference. First operand has 192 places, 281 transitions, 2692 flow. Second operand 64 states and 547 transitions. [2024-01-31 17:04:11,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 561 transitions, 5834 flow [2024-01-31 17:04:11,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 561 transitions, 5514 flow, removed 98 selfloop flow, removed 8 redundant places. [2024-01-31 17:04:11,661 INFO L231 Difference]: Finished difference. Result has 254 places, 384 transitions, 4192 flow [2024-01-31 17:04:11,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=4192, PETRI_PLACES=254, PETRI_TRANSITIONS=384} [2024-01-31 17:04:11,662 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 229 predicate places. [2024-01-31 17:04:11,662 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 384 transitions, 4192 flow [2024-01-31 17:04:11,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:11,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:11,663 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 17:04:11,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-31 17:04:11,863 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 17:04:11,864 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 17:04:11,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1924214320, now seen corresponding path program 5 times [2024-01-31 17:04:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:11,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058772551] [2024-01-31 17:04:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:11,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:11,981 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 17:04:11,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:11,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058772551] [2024-01-31 17:04:11,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058772551] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:11,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842899161] [2024-01-31 17:04:11,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:04:11,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:11,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:11,983 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 17:04:12,014 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 17:04:12,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:12,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:12,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:12,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:12,164 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 17:04:12,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:12,278 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 17:04:12,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842899161] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:12,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:12,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-31 17:04:12,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063820063] [2024-01-31 17:04:12,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:12,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:04:12,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:12,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:04:12,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2024-01-31 17:04:12,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:12,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 384 transitions, 4192 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 17:04:12,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:12,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:12,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:12,827 INFO L124 PetriNetUnfolderBase]: 1083/2044 cut-off events. [2024-01-31 17:04:12,827 INFO L125 PetriNetUnfolderBase]: For 20265/20265 co-relation queries the response was YES. [2024-01-31 17:04:12,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12456 conditions, 2044 events. 1083/2044 cut-off events. For 20265/20265 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11959 event pairs, 116 based on Foata normal form. 2/2042 useless extension candidates. Maximal degree in co-relation 12078. Up to 1324 conditions per place. [2024-01-31 17:04:12,846 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 181 selfloop transitions, 246 changer transitions 10/438 dead transitions. [2024-01-31 17:04:12,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 438 transitions, 5437 flow [2024-01-31 17:04:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:04:12,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:04:12,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 151 transitions. [2024-01-31 17:04:12,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34553775743707094 [2024-01-31 17:04:12,848 INFO L175 Difference]: Start difference. First operand has 254 places, 384 transitions, 4192 flow. Second operand 19 states and 151 transitions. [2024-01-31 17:04:12,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 438 transitions, 5437 flow [2024-01-31 17:04:12,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 438 transitions, 5120 flow, removed 71 selfloop flow, removed 22 redundant places. [2024-01-31 17:04:12,918 INFO L231 Difference]: Finished difference. Result has 255 places, 396 transitions, 4880 flow [2024-01-31 17:04:12,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3928, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4880, PETRI_PLACES=255, PETRI_TRANSITIONS=396} [2024-01-31 17:04:12,919 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 230 predicate places. [2024-01-31 17:04:12,919 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 396 transitions, 4880 flow [2024-01-31 17:04:12,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 17:04:12,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:12,920 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 17:04:12,933 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 17:04:13,122 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 17:04:13,124 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 17:04:13,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:13,125 INFO L85 PathProgramCache]: Analyzing trace with hash 263968856, now seen corresponding path program 6 times [2024-01-31 17:04:13,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:13,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604605350] [2024-01-31 17:04:13,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:13,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:13,278 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 17:04:13,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:13,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604605350] [2024-01-31 17:04:13,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604605350] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:13,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534106776] [2024-01-31 17:04:13,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:04:13,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:13,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:13,281 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 17:04:13,304 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 17:04:13,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:04:13,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:13,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:13,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:13,494 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 17:04:13,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:13,623 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 17:04:13,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534106776] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:13,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:13,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-31 17:04:13,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443158186] [2024-01-31 17:04:13,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:13,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:04:13,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:13,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:04:13,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:04:13,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:13,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 396 transitions, 4880 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:13,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:13,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:13,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:14,273 INFO L124 PetriNetUnfolderBase]: 1098/2077 cut-off events. [2024-01-31 17:04:14,273 INFO L125 PetriNetUnfolderBase]: For 17385/17385 co-relation queries the response was YES. [2024-01-31 17:04:14,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13149 conditions, 2077 events. 1098/2077 cut-off events. For 17385/17385 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12181 event pairs, 130 based on Foata normal form. 2/2079 useless extension candidates. Maximal degree in co-relation 13087. Up to 1380 conditions per place. [2024-01-31 17:04:14,290 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 191 selfloop transitions, 252 changer transitions 10/454 dead transitions. [2024-01-31 17:04:14,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 454 transitions, 6141 flow [2024-01-31 17:04:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 17:04:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 17:04:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 181 transitions. [2024-01-31 17:04:14,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3278985507246377 [2024-01-31 17:04:14,292 INFO L175 Difference]: Start difference. First operand has 255 places, 396 transitions, 4880 flow. Second operand 24 states and 181 transitions. [2024-01-31 17:04:14,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 454 transitions, 6141 flow [2024-01-31 17:04:14,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 454 transitions, 6073 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-01-31 17:04:14,361 INFO L231 Difference]: Finished difference. Result has 278 places, 407 transitions, 5788 flow [2024-01-31 17:04:14,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5788, PETRI_PLACES=278, PETRI_TRANSITIONS=407} [2024-01-31 17:04:14,362 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 253 predicate places. [2024-01-31 17:04:14,362 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 407 transitions, 5788 flow [2024-01-31 17:04:14,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:14,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:14,363 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 17:04:14,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-31 17:04:14,563 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 17:04:14,563 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 17:04:14,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:14,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1339680012, now seen corresponding path program 7 times [2024-01-31 17:04:14,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:14,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428584655] [2024-01-31 17:04:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:14,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:14,687 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 17:04:14,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:14,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428584655] [2024-01-31 17:04:14,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428584655] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:14,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020110906] [2024-01-31 17:04:14,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:04:14,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:14,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:14,690 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 17:04:14,716 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 17:04:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:14,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:14,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:14,901 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 17:04:14,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:15,022 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 17:04:15,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020110906] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:15,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:15,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-31 17:04:15,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671050403] [2024-01-31 17:04:15,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:15,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:04:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:15,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:04:15,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:04:15,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:15,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 407 transitions, 5788 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:15,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:15,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:15,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:15,658 INFO L124 PetriNetUnfolderBase]: 1127/2148 cut-off events. [2024-01-31 17:04:15,658 INFO L125 PetriNetUnfolderBase]: For 21387/21387 co-relation queries the response was YES. [2024-01-31 17:04:15,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14734 conditions, 2148 events. 1127/2148 cut-off events. For 21387/21387 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12771 event pairs, 124 based on Foata normal form. 2/2150 useless extension candidates. Maximal degree in co-relation 14667. Up to 1473 conditions per place. [2024-01-31 17:04:15,676 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 195 selfloop transitions, 257 changer transitions 10/463 dead transitions. [2024-01-31 17:04:15,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 463 transitions, 7144 flow [2024-01-31 17:04:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 17:04:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 17:04:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 162 transitions. [2024-01-31 17:04:15,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33540372670807456 [2024-01-31 17:04:15,678 INFO L175 Difference]: Start difference. First operand has 278 places, 407 transitions, 5788 flow. Second operand 21 states and 162 transitions. [2024-01-31 17:04:15,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 463 transitions, 7144 flow [2024-01-31 17:04:15,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 463 transitions, 7076 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-01-31 17:04:15,770 INFO L231 Difference]: Finished difference. Result has 292 places, 423 transitions, 6956 flow [2024-01-31 17:04:15,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5720, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6956, PETRI_PLACES=292, PETRI_TRANSITIONS=423} [2024-01-31 17:04:15,770 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 267 predicate places. [2024-01-31 17:04:15,771 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 423 transitions, 6956 flow [2024-01-31 17:04:15,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:15,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:15,771 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 17:04:15,782 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 17:04:15,977 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 17:04:15,977 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 17:04:15,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:15,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1844941450, now seen corresponding path program 8 times [2024-01-31 17:04:15,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:15,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117508111] [2024-01-31 17:04:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:15,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:16,121 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 17:04:16,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:16,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117508111] [2024-01-31 17:04:16,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117508111] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:16,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444530631] [2024-01-31 17:04:16,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:04:16,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:16,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:16,137 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 17:04:16,168 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 17:04:16,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:16,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:16,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:16,388 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 17:04:16,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:16,506 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 17:04:16,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444530631] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:16,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:16,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-31 17:04:16,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668553985] [2024-01-31 17:04:16,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:16,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:04:16,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:04:16,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:04:16,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:16,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 423 transitions, 6956 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:16,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:16,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:16,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:17,313 INFO L124 PetriNetUnfolderBase]: 1133/2166 cut-off events. [2024-01-31 17:04:17,313 INFO L125 PetriNetUnfolderBase]: For 26162/26162 co-relation queries the response was YES. [2024-01-31 17:04:17,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16262 conditions, 2166 events. 1133/2166 cut-off events. For 26162/26162 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12967 event pairs, 123 based on Foata normal form. 2/2168 useless extension candidates. Maximal degree in co-relation 16190. Up to 1357 conditions per place. [2024-01-31 17:04:17,333 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 174 selfloop transitions, 293 changer transitions 10/478 dead transitions. [2024-01-31 17:04:17,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 478 transitions, 8257 flow [2024-01-31 17:04:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:04:17,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:04:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 196 transitions. [2024-01-31 17:04:17,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31561996779388085 [2024-01-31 17:04:17,334 INFO L175 Difference]: Start difference. First operand has 292 places, 423 transitions, 6956 flow. Second operand 27 states and 196 transitions. [2024-01-31 17:04:17,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 478 transitions, 8257 flow [2024-01-31 17:04:17,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 478 transitions, 8148 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-01-31 17:04:17,465 INFO L231 Difference]: Finished difference. Result has 310 places, 433 transitions, 7908 flow [2024-01-31 17:04:17,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6854, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7908, PETRI_PLACES=310, PETRI_TRANSITIONS=433} [2024-01-31 17:04:17,467 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 285 predicate places. [2024-01-31 17:04:17,467 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 433 transitions, 7908 flow [2024-01-31 17:04:17,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:17,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:17,467 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 17:04:17,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 17:04:17,678 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 17:04:17,679 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 17:04:17,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1304204654, now seen corresponding path program 9 times [2024-01-31 17:04:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:17,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191207881] [2024-01-31 17:04:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:17,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:17,812 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 17:04:17,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:17,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191207881] [2024-01-31 17:04:17,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191207881] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:17,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403546795] [2024-01-31 17:04:17,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:04:17,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:17,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:17,813 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 17:04:17,843 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 17:04:17,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:04:17,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:17,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:17,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:18,032 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 17:04:18,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:18,142 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 17:04:18,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403546795] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:18,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:18,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-31 17:04:18,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172542179] [2024-01-31 17:04:18,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:18,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:04:18,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:18,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:04:18,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:04:18,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:18,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 433 transitions, 7908 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:18,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:18,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:18,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:19,043 INFO L124 PetriNetUnfolderBase]: 1136/2172 cut-off events. [2024-01-31 17:04:19,043 INFO L125 PetriNetUnfolderBase]: For 32702/32702 co-relation queries the response was YES. [2024-01-31 17:04:19,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17514 conditions, 2172 events. 1136/2172 cut-off events. For 32702/32702 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13018 event pairs, 119 based on Foata normal form. 1/2173 useless extension candidates. Maximal degree in co-relation 17437. Up to 1361 conditions per place. [2024-01-31 17:04:19,062 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 182 selfloop transitions, 290 changer transitions 5/478 dead transitions. [2024-01-31 17:04:19,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 478 transitions, 9102 flow [2024-01-31 17:04:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:04:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:04:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 192 transitions. [2024-01-31 17:04:19,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30917874396135264 [2024-01-31 17:04:19,065 INFO L175 Difference]: Start difference. First operand has 310 places, 433 transitions, 7908 flow. Second operand 27 states and 192 transitions. [2024-01-31 17:04:19,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 478 transitions, 9102 flow [2024-01-31 17:04:19,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 478 transitions, 8869 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-01-31 17:04:19,206 INFO L231 Difference]: Finished difference. Result has 322 places, 437 transitions, 8357 flow [2024-01-31 17:04:19,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7675, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8357, PETRI_PLACES=322, PETRI_TRANSITIONS=437} [2024-01-31 17:04:19,207 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 297 predicate places. [2024-01-31 17:04:19,207 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 437 transitions, 8357 flow [2024-01-31 17:04:19,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:19,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:19,207 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 17:04:19,218 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 17:04:19,408 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 17:04:19,408 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 17:04:19,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1674605338, now seen corresponding path program 10 times [2024-01-31 17:04:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:19,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483468529] [2024-01-31 17:04:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:19,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:19,541 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 17:04:19,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:19,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483468529] [2024-01-31 17:04:19,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483468529] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:19,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915314899] [2024-01-31 17:04:19,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:04:19,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:19,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:19,543 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 17:04:19,544 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 17:04:19,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:04:19,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:19,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:19,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:19,733 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 17:04:19,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:19,859 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 17:04:19,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915314899] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:19,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:19,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-31 17:04:19,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292296810] [2024-01-31 17:04:19,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:19,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:04:19,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:19,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:04:19,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:04:19,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:19,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 437 transitions, 8357 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:19,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:19,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:19,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:21,145 INFO L124 PetriNetUnfolderBase]: 1240/2376 cut-off events. [2024-01-31 17:04:21,145 INFO L125 PetriNetUnfolderBase]: For 39190/39190 co-relation queries the response was YES. [2024-01-31 17:04:21,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19768 conditions, 2376 events. 1240/2376 cut-off events. For 39190/39190 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14582 event pairs, 99 based on Foata normal form. 3/2379 useless extension candidates. Maximal degree in co-relation 19690. Up to 1173 conditions per place. [2024-01-31 17:04:21,166 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 205 selfloop transitions, 360 changer transitions 17/583 dead transitions. [2024-01-31 17:04:21,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 583 transitions, 11028 flow [2024-01-31 17:04:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-01-31 17:04:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-01-31 17:04:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 342 transitions. [2024-01-31 17:04:21,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33043478260869563 [2024-01-31 17:04:21,167 INFO L175 Difference]: Start difference. First operand has 322 places, 437 transitions, 8357 flow. Second operand 45 states and 342 transitions. [2024-01-31 17:04:21,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 583 transitions, 11028 flow [2024-01-31 17:04:21,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 583 transitions, 10862 flow, removed 13 selfloop flow, removed 19 redundant places. [2024-01-31 17:04:21,361 INFO L231 Difference]: Finished difference. Result has 360 places, 495 transitions, 10454 flow [2024-01-31 17:04:21,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8203, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=10454, PETRI_PLACES=360, PETRI_TRANSITIONS=495} [2024-01-31 17:04:21,362 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 335 predicate places. [2024-01-31 17:04:21,362 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 495 transitions, 10454 flow [2024-01-31 17:04:21,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:21,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:21,363 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 17:04:21,377 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 17:04:21,575 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 17:04:21,575 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 17:04:21,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:21,576 INFO L85 PathProgramCache]: Analyzing trace with hash -233214576, now seen corresponding path program 11 times [2024-01-31 17:04:21,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:21,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496636077] [2024-01-31 17:04:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:21,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:21,685 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 17:04:21,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:21,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496636077] [2024-01-31 17:04:21,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496636077] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:21,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873067113] [2024-01-31 17:04:21,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:04:21,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:21,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:21,687 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 17:04:21,692 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 17:04:21,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:21,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:21,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:21,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:21,879 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 17:04:21,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:21,983 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 17:04:21,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873067113] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:21,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:21,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-31 17:04:21,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447290986] [2024-01-31 17:04:21,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:21,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:04:21,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:21,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:04:21,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:04:21,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:21,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 495 transitions, 10454 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:21,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:21,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:21,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:22,646 INFO L124 PetriNetUnfolderBase]: 1239/2374 cut-off events. [2024-01-31 17:04:22,647 INFO L125 PetriNetUnfolderBase]: For 52051/52051 co-relation queries the response was YES. [2024-01-31 17:04:22,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21921 conditions, 2374 events. 1239/2374 cut-off events. For 52051/52051 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14573 event pairs, 117 based on Foata normal form. 2/2376 useless extension candidates. Maximal degree in co-relation 21830. Up to 1533 conditions per place. [2024-01-31 17:04:22,671 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 237 selfloop transitions, 285 changer transitions 10/533 dead transitions. [2024-01-31 17:04:22,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 533 transitions, 11817 flow [2024-01-31 17:04:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:04:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:04:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2024-01-31 17:04:22,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3318077803203661 [2024-01-31 17:04:22,672 INFO L175 Difference]: Start difference. First operand has 360 places, 495 transitions, 10454 flow. Second operand 19 states and 145 transitions. [2024-01-31 17:04:22,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 533 transitions, 11817 flow [2024-01-31 17:04:22,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 533 transitions, 11544 flow, removed 119 selfloop flow, removed 13 redundant places. [2024-01-31 17:04:22,986 INFO L231 Difference]: Finished difference. Result has 368 places, 499 transitions, 11220 flow [2024-01-31 17:04:22,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10181, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11220, PETRI_PLACES=368, PETRI_TRANSITIONS=499} [2024-01-31 17:04:22,987 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 343 predicate places. [2024-01-31 17:04:22,988 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 499 transitions, 11220 flow [2024-01-31 17:04:22,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:22,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:22,988 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 17:04:23,001 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 17:04:23,193 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 17:04:23,194 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 17:04:23,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash 54441996, now seen corresponding path program 12 times [2024-01-31 17:04:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:23,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742158311] [2024-01-31 17:04:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:23,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:23,329 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 17:04:23,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:23,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742158311] [2024-01-31 17:04:23,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742158311] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:23,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99241492] [2024-01-31 17:04:23,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:04:23,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:23,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:23,331 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 17:04:23,352 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 17:04:23,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:04:23,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:23,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:23,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:23,547 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 17:04:23,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:23,686 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 17:04:23,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99241492] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:23,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:23,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-31 17:04:23,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002755662] [2024-01-31 17:04:23,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:23,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:04:23,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:23,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:04:23,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:04:23,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:23,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 499 transitions, 11220 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:23,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:23,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:23,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:25,705 INFO L124 PetriNetUnfolderBase]: 1354/2605 cut-off events. [2024-01-31 17:04:25,705 INFO L125 PetriNetUnfolderBase]: For 62626/62626 co-relation queries the response was YES. [2024-01-31 17:04:25,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24554 conditions, 2605 events. 1354/2605 cut-off events. For 62626/62626 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16459 event pairs, 89 based on Foata normal form. 3/2608 useless extension candidates. Maximal degree in co-relation 24461. Up to 996 conditions per place. [2024-01-31 17:04:25,734 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 221 selfloop transitions, 455 changer transitions 18/695 dead transitions. [2024-01-31 17:04:25,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 695 transitions, 14761 flow [2024-01-31 17:04:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-01-31 17:04:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-01-31 17:04:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 484 transitions. [2024-01-31 17:04:25,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33402346445824704 [2024-01-31 17:04:25,735 INFO L175 Difference]: Start difference. First operand has 368 places, 499 transitions, 11220 flow. Second operand 63 states and 484 transitions. [2024-01-31 17:04:25,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 695 transitions, 14761 flow [2024-01-31 17:04:26,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 695 transitions, 14495 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-01-31 17:04:26,018 INFO L231 Difference]: Finished difference. Result has 424 places, 573 transitions, 13783 flow [2024-01-31 17:04:26,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10964, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=13783, PETRI_PLACES=424, PETRI_TRANSITIONS=573} [2024-01-31 17:04:26,019 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 399 predicate places. [2024-01-31 17:04:26,019 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 573 transitions, 13783 flow [2024-01-31 17:04:26,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:26,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:26,020 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 17:04:26,034 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 17:04:26,220 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 17:04:26,220 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 17:04:26,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:26,221 INFO L85 PathProgramCache]: Analyzing trace with hash 230207722, now seen corresponding path program 13 times [2024-01-31 17:04:26,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:26,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76955828] [2024-01-31 17:04:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:26,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:26,356 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 17:04:26,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:26,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76955828] [2024-01-31 17:04:26,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76955828] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:26,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213314845] [2024-01-31 17:04:26,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:04:26,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:26,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:26,365 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 17:04:26,366 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 17:04:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:26,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:04:26,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:26,585 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 17:04:26,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:26,733 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 17:04:26,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213314845] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:26,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:26,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-31 17:04:26,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049161742] [2024-01-31 17:04:26,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:26,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:04:26,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:26,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:04:26,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:04:26,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:26,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 573 transitions, 13783 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 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 17:04:26,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:26,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:26,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:28,605 INFO L124 PetriNetUnfolderBase]: 1603/3030 cut-off events. [2024-01-31 17:04:28,605 INFO L125 PetriNetUnfolderBase]: For 79334/79334 co-relation queries the response was YES. [2024-01-31 17:04:28,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30596 conditions, 3030 events. 1603/3030 cut-off events. For 79334/79334 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19392 event pairs, 97 based on Foata normal form. 4/3034 useless extension candidates. Maximal degree in co-relation 30373. Up to 1089 conditions per place. [2024-01-31 17:04:28,639 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 292 selfloop transitions, 498 changer transitions 20/811 dead transitions. [2024-01-31 17:04:28,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 811 transitions, 19004 flow [2024-01-31 17:04:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-01-31 17:04:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-01-31 17:04:28,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 434 transitions. [2024-01-31 17:04:28,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362876254180602 [2024-01-31 17:04:28,641 INFO L175 Difference]: Start difference. First operand has 424 places, 573 transitions, 13783 flow. Second operand 52 states and 434 transitions. [2024-01-31 17:04:28,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 811 transitions, 19004 flow [2024-01-31 17:04:29,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 811 transitions, 17935 flow, removed 402 selfloop flow, removed 31 redundant places. [2024-01-31 17:04:29,143 INFO L231 Difference]: Finished difference. Result has 451 places, 676 transitions, 17036 flow [2024-01-31 17:04:29,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=13001, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=17036, PETRI_PLACES=451, PETRI_TRANSITIONS=676} [2024-01-31 17:04:29,144 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 426 predicate places. [2024-01-31 17:04:29,144 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 676 transitions, 17036 flow [2024-01-31 17:04:29,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 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 17:04:29,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:29,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:29,155 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 17:04:29,346 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 17:04:29,346 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 17:04:29,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash -271064938, now seen corresponding path program 14 times [2024-01-31 17:04:29,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:29,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977168745] [2024-01-31 17:04:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:29,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:29,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:29,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977168745] [2024-01-31 17:04:29,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977168745] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:29,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095611072] [2024-01-31 17:04:29,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:04:29,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:29,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:29,516 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 17:04:29,519 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 17:04:29,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:29,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:29,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:04:29,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:29,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:29,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095611072] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:29,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:29,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-31 17:04:29,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740014071] [2024-01-31 17:04:29,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:29,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:04:29,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:29,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:04:29,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:04:30,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:30,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 676 transitions, 17036 flow. Second operand has 31 states, 31 states have (on average 4.774193548387097) internal successors, (148), 31 states have internal predecessors, (148), 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 17:04:30,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:30,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:30,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:35,763 INFO L124 PetriNetUnfolderBase]: 3654/6796 cut-off events. [2024-01-31 17:04:35,764 INFO L125 PetriNetUnfolderBase]: For 185181/185181 co-relation queries the response was YES. [2024-01-31 17:04:35,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70293 conditions, 6796 events. 3654/6796 cut-off events. For 185181/185181 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 48826 event pairs, 125 based on Foata normal form. 107/6903 useless extension candidates. Maximal degree in co-relation 69868. Up to 1737 conditions per place. [2024-01-31 17:04:35,843 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 591 selfloop transitions, 1202 changer transitions 47/1841 dead transitions. [2024-01-31 17:04:35,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1841 transitions, 44741 flow [2024-01-31 17:04:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2024-01-31 17:04:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2024-01-31 17:04:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 1157 transitions. [2024-01-31 17:04:35,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754055807916937 [2024-01-31 17:04:35,845 INFO L175 Difference]: Start difference. First operand has 451 places, 676 transitions, 17036 flow. Second operand 134 states and 1157 transitions. [2024-01-31 17:04:35,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1841 transitions, 44741 flow [2024-01-31 17:04:37,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 1841 transitions, 43293 flow, removed 476 selfloop flow, removed 22 redundant places. [2024-01-31 17:04:37,274 INFO L231 Difference]: Finished difference. Result has 605 places, 1426 transitions, 39968 flow [2024-01-31 17:04:37,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=16421, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=134, PETRI_FLOW=39968, PETRI_PLACES=605, PETRI_TRANSITIONS=1426} [2024-01-31 17:04:37,275 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 580 predicate places. [2024-01-31 17:04:37,275 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 1426 transitions, 39968 flow [2024-01-31 17:04:37,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.774193548387097) internal successors, (148), 31 states have internal predecessors, (148), 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 17:04:37,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:37,276 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 17:04:37,287 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 17:04:37,479 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 17:04:37,480 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 17:04:37,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:37,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1073343025, now seen corresponding path program 1 times [2024-01-31 17:04:37,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:37,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879078605] [2024-01-31 17:04:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:37,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:37,614 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 17:04:37,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:37,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879078605] [2024-01-31 17:04:37,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879078605] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:37,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602259972] [2024-01-31 17:04:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:37,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:37,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:37,617 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 17:04:37,635 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 17:04:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:37,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:04:37,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:37,832 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 17:04:37,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:37,956 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 17:04:37,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602259972] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:37,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:37,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-01-31 17:04:37,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966423726] [2024-01-31 17:04:37,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:37,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 17:04:37,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:37,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 17:04:37,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2024-01-31 17:04:37,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:37,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1426 transitions, 39968 flow. Second operand has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 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 17:04:37,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:37,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:37,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:41,809 INFO L124 PetriNetUnfolderBase]: 3609/6665 cut-off events. [2024-01-31 17:04:41,810 INFO L125 PetriNetUnfolderBase]: For 261655/261655 co-relation queries the response was YES. [2024-01-31 17:04:41,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77922 conditions, 6665 events. 3609/6665 cut-off events. For 261655/261655 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 47354 event pairs, 142 based on Foata normal form. 2/6667 useless extension candidates. Maximal degree in co-relation 77756. Up to 3245 conditions per place. [2024-01-31 17:04:41,916 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 645 selfloop transitions, 884 changer transitions 35/1565 dead transitions. [2024-01-31 17:04:41,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 1565 transitions, 44511 flow [2024-01-31 17:04:41,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-01-31 17:04:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-01-31 17:04:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 387 transitions. [2024-01-31 17:04:41,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3657844990548204 [2024-01-31 17:04:41,917 INFO L175 Difference]: Start difference. First operand has 605 places, 1426 transitions, 39968 flow. Second operand 46 states and 387 transitions. [2024-01-31 17:04:41,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 1565 transitions, 44511 flow [2024-01-31 17:04:44,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 1565 transitions, 42957 flow, removed 651 selfloop flow, removed 24 redundant places. [2024-01-31 17:04:44,632 INFO L231 Difference]: Finished difference. Result has 626 places, 1426 transitions, 40310 flow [2024-01-31 17:04:44,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=38450, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=879, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=40310, PETRI_PLACES=626, PETRI_TRANSITIONS=1426} [2024-01-31 17:04:44,635 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 601 predicate places. [2024-01-31 17:04:44,635 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 1426 transitions, 40310 flow [2024-01-31 17:04:44,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 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 17:04:44,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:44,636 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:44,647 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 17:04:44,841 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 17:04:44,842 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 17:04:44,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:44,842 INFO L85 PathProgramCache]: Analyzing trace with hash 81110808, now seen corresponding path program 15 times [2024-01-31 17:04:44,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:44,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15496836] [2024-01-31 17:04:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:44,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:45,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:45,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15496836] [2024-01-31 17:04:45,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15496836] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:45,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820529320] [2024-01-31 17:04:45,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:04:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:45,021 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 17:04:45,047 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 17:04:45,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:04:45,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:45,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:04:45,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:45,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:45,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820529320] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:45,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:45,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-31 17:04:45,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977149947] [2024-01-31 17:04:45,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:45,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:04:45,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:45,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:04:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:04:45,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:45,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 1426 transitions, 40310 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:45,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:45,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:45,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:54,085 INFO L124 PetriNetUnfolderBase]: 4703/8573 cut-off events. [2024-01-31 17:04:54,085 INFO L125 PetriNetUnfolderBase]: For 366972/366972 co-relation queries the response was YES. [2024-01-31 17:04:54,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103342 conditions, 8573 events. 4703/8573 cut-off events. For 366972/366972 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 62722 event pairs, 171 based on Foata normal form. 9/8582 useless extension candidates. Maximal degree in co-relation 103101. Up to 2376 conditions per place. [2024-01-31 17:04:54,237 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 674 selfloop transitions, 1531 changer transitions 37/2243 dead transitions. [2024-01-31 17:04:54,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 772 places, 2243 transitions, 62397 flow [2024-01-31 17:04:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2024-01-31 17:04:54,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2024-01-31 17:04:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 1261 transitions. [2024-01-31 17:04:54,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34700055035773253 [2024-01-31 17:04:54,239 INFO L175 Difference]: Start difference. First operand has 626 places, 1426 transitions, 40310 flow. Second operand 158 states and 1261 transitions. [2024-01-31 17:04:54,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 772 places, 2243 transitions, 62397 flow [2024-01-31 17:04:57,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 2243 transitions, 60930 flow, removed 136 selfloop flow, removed 37 redundant places. [2024-01-31 17:04:58,004 INFO L231 Difference]: Finished difference. Result has 763 places, 1848 transitions, 56893 flow [2024-01-31 17:04:58,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=39232, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=158, PETRI_FLOW=56893, PETRI_PLACES=763, PETRI_TRANSITIONS=1848} [2024-01-31 17:04:58,006 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 738 predicate places. [2024-01-31 17:04:58,006 INFO L495 AbstractCegarLoop]: Abstraction has has 763 places, 1848 transitions, 56893 flow [2024-01-31 17:04:58,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:58,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:58,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:58,021 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 17:04:58,217 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 17:04:58,218 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 17:04:58,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash 257788086, now seen corresponding path program 16 times [2024-01-31 17:04:58,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:58,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398878083] [2024-01-31 17:04:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:58,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:58,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:58,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398878083] [2024-01-31 17:04:58,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398878083] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:58,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839319068] [2024-01-31 17:04:58,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:04:58,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:58,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:58,339 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 17:04:58,340 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 17:04:58,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:04:58,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:58,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:04:58,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:58,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:58,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839319068] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:58,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:58,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-31 17:04:58,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956093976] [2024-01-31 17:04:58,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:58,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:04:58,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:58,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:04:58,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:04:58,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:58,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 1848 transitions, 56893 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:58,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:58,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:58,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:05,735 INFO L124 PetriNetUnfolderBase]: 5171/9400 cut-off events. [2024-01-31 17:05:05,735 INFO L125 PetriNetUnfolderBase]: For 490510/490510 co-relation queries the response was YES. [2024-01-31 17:05:05,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122356 conditions, 9400 events. 5171/9400 cut-off events. For 490510/490510 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 69887 event pairs, 296 based on Foata normal form. 3/9403 useless extension candidates. Maximal degree in co-relation 122183. Up to 5294 conditions per place. [2024-01-31 17:05:05,919 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 834 selfloop transitions, 1366 changer transitions 15/2216 dead transitions. [2024-01-31 17:05:05,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 2216 transitions, 70251 flow [2024-01-31 17:05:05,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-01-31 17:05:05,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-01-31 17:05:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 526 transitions. [2024-01-31 17:05:05,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3314429741650914 [2024-01-31 17:05:05,920 INFO L175 Difference]: Start difference. First operand has 763 places, 1848 transitions, 56893 flow. Second operand 69 states and 526 transitions. [2024-01-31 17:05:05,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 2216 transitions, 70251 flow [2024-01-31 17:05:11,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 773 places, 2216 transitions, 68655 flow, removed 404 selfloop flow, removed 52 redundant places. [2024-01-31 17:05:11,679 INFO L231 Difference]: Finished difference. Result has 787 places, 2050 transitions, 65994 flow [2024-01-31 17:05:11,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=55517, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=65994, PETRI_PLACES=787, PETRI_TRANSITIONS=2050} [2024-01-31 17:05:11,682 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 762 predicate places. [2024-01-31 17:05:11,682 INFO L495 AbstractCegarLoop]: Abstraction has has 787 places, 2050 transitions, 65994 flow [2024-01-31 17:05:11,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:05:11,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:05:11,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:05:11,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 17:05:11,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:11,883 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:05:11,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:05:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1848996034, now seen corresponding path program 17 times [2024-01-31 17:05:11,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:05:11,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273019810] [2024-01-31 17:05:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:05:11,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:05:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:12,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:12,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273019810] [2024-01-31 17:05:12,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273019810] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:12,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143379016] [2024-01-31 17:05:12,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:05:12,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:12,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:12,024 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:05:12,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 17:05:12,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:05:12,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:05:12,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:05:12,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:12,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:05:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:12,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143379016] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:05:12,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:05:12,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-31 17:05:12,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584419646] [2024-01-31 17:05:12,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:05:12,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:05:12,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:05:12,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:05:12,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:05:12,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:05:12,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 2050 transitions, 65994 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:05:12,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:05:12,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:05:12,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:19,915 INFO L124 PetriNetUnfolderBase]: 5322/9686 cut-off events. [2024-01-31 17:05:19,915 INFO L125 PetriNetUnfolderBase]: For 528330/528330 co-relation queries the response was YES. [2024-01-31 17:05:20,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129971 conditions, 9686 events. 5322/9686 cut-off events. For 528330/528330 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 72522 event pairs, 300 based on Foata normal form. 3/9689 useless extension candidates. Maximal degree in co-relation 129790. Up to 5304 conditions per place. [2024-01-31 17:05:20,077 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 804 selfloop transitions, 1468 changer transitions 15/2288 dead transitions. [2024-01-31 17:05:20,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 2288 transitions, 74774 flow [2024-01-31 17:05:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-01-31 17:05:20,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2024-01-31 17:05:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 623 transitions. [2024-01-31 17:05:20,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32634887375589317 [2024-01-31 17:05:20,079 INFO L175 Difference]: Start difference. First operand has 787 places, 2050 transitions, 65994 flow. Second operand 83 states and 623 transitions. [2024-01-31 17:05:20,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 2288 transitions, 74774 flow [2024-01-31 17:05:26,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 2288 transitions, 74659 flow, removed 22 selfloop flow, removed 15 redundant places. [2024-01-31 17:05:26,350 INFO L231 Difference]: Finished difference. Result has 861 places, 2119 transitions, 72880 flow [2024-01-31 17:05:26,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=65887, PETRI_DIFFERENCE_MINUEND_PLACES=769, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=72880, PETRI_PLACES=861, PETRI_TRANSITIONS=2119} [2024-01-31 17:05:26,352 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 836 predicate places. [2024-01-31 17:05:26,353 INFO L495 AbstractCegarLoop]: Abstraction has has 861 places, 2119 transitions, 72880 flow [2024-01-31 17:05:26,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:05:26,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:05:26,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:05:26,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 17:05:26,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:26,564 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:05:26,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:05:26,565 INFO L85 PathProgramCache]: Analyzing trace with hash -773284878, now seen corresponding path program 18 times [2024-01-31 17:05:26,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:05:26,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357350554] [2024-01-31 17:05:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:05:26,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:05:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:26,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:26,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357350554] [2024-01-31 17:05:26,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357350554] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:26,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479038789] [2024-01-31 17:05:26,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:05:26,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:26,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:26,686 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:05:26,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 17:05:26,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:05:26,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:05:26,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:05:26,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:26,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:05:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:27,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479038789] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:05:27,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:05:27,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-31 17:05:27,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669813691] [2024-01-31 17:05:27,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:05:27,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:05:27,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:05:27,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:05:27,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:05:27,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:05:27,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 861 places, 2119 transitions, 72880 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:05:27,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:05:27,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:05:27,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:34,853 INFO L124 PetriNetUnfolderBase]: 5330/9710 cut-off events. [2024-01-31 17:05:34,854 INFO L125 PetriNetUnfolderBase]: For 575688/575688 co-relation queries the response was YES. [2024-01-31 17:05:34,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136232 conditions, 9710 events. 5330/9710 cut-off events. For 575688/575688 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 72764 event pairs, 317 based on Foata normal form. 3/9713 useless extension candidates. Maximal degree in co-relation 136044. Up to 5481 conditions per place. [2024-01-31 17:05:35,025 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 776 selfloop transitions, 1484 changer transitions 15/2276 dead transitions. [2024-01-31 17:05:35,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 932 places, 2276 transitions, 79195 flow [2024-01-31 17:05:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-01-31 17:05:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-01-31 17:05:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 560 transitions. [2024-01-31 17:05:35,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32463768115942027 [2024-01-31 17:05:35,027 INFO L175 Difference]: Start difference. First operand has 861 places, 2119 transitions, 72880 flow. Second operand 75 states and 560 transitions. [2024-01-31 17:05:35,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 932 places, 2276 transitions, 79195 flow [2024-01-31 17:05:41,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 898 places, 2276 transitions, 78033 flow, removed 51 selfloop flow, removed 34 redundant places. [2024-01-31 17:05:41,339 INFO L231 Difference]: Finished difference. Result has 904 places, 2127 transitions, 76284 flow [2024-01-31 17:05:41,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=71722, PETRI_DIFFERENCE_MINUEND_PLACES=824, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=76284, PETRI_PLACES=904, PETRI_TRANSITIONS=2127} [2024-01-31 17:05:41,341 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 879 predicate places. [2024-01-31 17:05:41,341 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 2127 transitions, 76284 flow [2024-01-31 17:05:41,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:05:41,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:05:41,341 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 17:05:41,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-31 17:05:41,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:41,542 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:05:41,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:05:41,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1023289845, now seen corresponding path program 2 times [2024-01-31 17:05:41,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:05:41,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014517212] [2024-01-31 17:05:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:05:41,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:05:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:41,681 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 17:05:41,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:41,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014517212] [2024-01-31 17:05:41,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014517212] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:41,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576842132] [2024-01-31 17:05:41,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:05:41,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:41,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:41,682 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:05:41,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 17:05:41,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:05:41,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:05:41,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:05:41,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:41,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:05:42,057 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 17:05:42,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576842132] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:05:42,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:05:42,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-01-31 17:05:42,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133802602] [2024-01-31 17:05:42,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:05:42,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 17:05:42,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:05:42,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 17:05:42,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2024-01-31 17:05:42,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:05:42,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 2127 transitions, 76284 flow. Second operand has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 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 17:05:42,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:05:42,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:05:42,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:51,598 INFO L124 PetriNetUnfolderBase]: 6429/11711 cut-off events. [2024-01-31 17:05:51,598 INFO L125 PetriNetUnfolderBase]: For 774077/774077 co-relation queries the response was YES. [2024-01-31 17:05:51,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168216 conditions, 11711 events. 6429/11711 cut-off events. For 774077/774077 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 90942 event pairs, 226 based on Foata normal form. 92/11803 useless extension candidates. Maximal degree in co-relation 168031. Up to 4431 conditions per place. [2024-01-31 17:05:51,841 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 733 selfloop transitions, 2103 changer transitions 43/2880 dead transitions. [2024-01-31 17:05:51,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 985 places, 2880 transitions, 102909 flow [2024-01-31 17:05:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-01-31 17:05:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2024-01-31 17:05:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 659 transitions. [2024-01-31 17:05:51,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3370843989769821 [2024-01-31 17:05:51,843 INFO L175 Difference]: Start difference. First operand has 904 places, 2127 transitions, 76284 flow. Second operand 85 states and 659 transitions. [2024-01-31 17:05:51,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 985 places, 2880 transitions, 102909 flow [2024-01-31 17:06:00,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 937 places, 2880 transitions, 101770 flow, removed 27 selfloop flow, removed 48 redundant places. [2024-01-31 17:06:00,988 INFO L231 Difference]: Finished difference. Result has 963 places, 2657 transitions, 99976 flow [2024-01-31 17:06:00,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=75390, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=99976, PETRI_PLACES=963, PETRI_TRANSITIONS=2657} [2024-01-31 17:06:00,991 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 938 predicate places. [2024-01-31 17:06:00,991 INFO L495 AbstractCegarLoop]: Abstraction has has 963 places, 2657 transitions, 99976 flow [2024-01-31 17:06:00,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 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 17:06:00,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:06:00,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:06:01,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 17:06:01,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-31 17:06:01,192 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:06:01,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:06:01,193 INFO L85 PathProgramCache]: Analyzing trace with hash -532838730, now seen corresponding path program 19 times [2024-01-31 17:06:01,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:06:01,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048297163] [2024-01-31 17:06:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:06:01,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:06:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:06:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:01,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:06:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048297163] [2024-01-31 17:06:01,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048297163] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:06:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081310383] [2024-01-31 17:06:01,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:06:01,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:06:01,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:06:01,335 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:06:01,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 17:06:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:06:01,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:06:01,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:06:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:01,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:06:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:01,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081310383] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:06:01,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:06:01,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-31 17:06:01,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528081437] [2024-01-31 17:06:01,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:06:01,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:06:01,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:06:01,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:06:01,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:06:01,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:06:01,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 963 places, 2657 transitions, 99976 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:06:01,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:06:01,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:06:01,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:06:17,072 INFO L124 PetriNetUnfolderBase]: 8644/15627 cut-off events. [2024-01-31 17:06:17,072 INFO L125 PetriNetUnfolderBase]: For 1283767/1283767 co-relation queries the response was YES. [2024-01-31 17:06:17,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245992 conditions, 15627 events. 8644/15627 cut-off events. For 1283767/1283767 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 127455 event pairs, 319 based on Foata normal form. 10/15637 useless extension candidates. Maximal degree in co-relation 245464. Up to 5492 conditions per place. [2024-01-31 17:06:17,401 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1069 selfloop transitions, 2837 changer transitions 35/3942 dead transitions. [2024-01-31 17:06:17,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1089 places, 3942 transitions, 151932 flow [2024-01-31 17:06:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-01-31 17:06:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2024-01-31 17:06:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 989 transitions. [2024-01-31 17:06:17,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3282442748091603 [2024-01-31 17:06:17,410 INFO L175 Difference]: Start difference. First operand has 963 places, 2657 transitions, 99976 flow. Second operand 131 states and 989 transitions. [2024-01-31 17:06:17,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1089 places, 3942 transitions, 151932 flow [2024-01-31 17:06:37,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1066 places, 3942 transitions, 148855 flow, removed 809 selfloop flow, removed 23 redundant places. [2024-01-31 17:06:37,491 INFO L231 Difference]: Finished difference. Result has 1111 places, 3636 transitions, 147485 flow [2024-01-31 17:06:37,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=97972, PETRI_DIFFERENCE_MINUEND_PLACES=936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1910, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=131, PETRI_FLOW=147485, PETRI_PLACES=1111, PETRI_TRANSITIONS=3636} [2024-01-31 17:06:37,494 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1086 predicate places. [2024-01-31 17:06:37,494 INFO L495 AbstractCegarLoop]: Abstraction has has 1111 places, 3636 transitions, 147485 flow [2024-01-31 17:06:37,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:06:37,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:06:37,494 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:06:37,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-31 17:06:37,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-31 17:06:37,695 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:06:37,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:06:37,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1390742660, now seen corresponding path program 20 times [2024-01-31 17:06:37,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:06:37,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075980480] [2024-01-31 17:06:37,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:06:37,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:06:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:06:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:37,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:06:37,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075980480] [2024-01-31 17:06:37,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075980480] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:06:37,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216994607] [2024-01-31 17:06:37,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:06:37,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:06:37,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:06:37,832 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:06:37,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 17:06:37,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:06:37,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:06:37,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:06:37,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:06:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:38,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:06:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:38,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216994607] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:06:38,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:06:38,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-31 17:06:38,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510950513] [2024-01-31 17:06:38,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:06:38,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:06:38,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:06:38,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:06:38,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:06:38,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:06:38,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 3636 transitions, 147485 flow. Second operand has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 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 17:06:38,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:06:38,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:06:38,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:04,191 INFO L124 PetriNetUnfolderBase]: 11868/21375 cut-off events. [2024-01-31 17:07:04,192 INFO L125 PetriNetUnfolderBase]: For 1975268/1975268 co-relation queries the response was YES. [2024-01-31 17:07:04,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354148 conditions, 21375 events. 11868/21375 cut-off events. For 1975268/1975268 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 181454 event pairs, 261 based on Foata normal form. 5/21380 useless extension candidates. Maximal degree in co-relation 353891. Up to 6259 conditions per place. [2024-01-31 17:07:04,734 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 1206 selfloop transitions, 4012 changer transitions 16/5235 dead transitions. [2024-01-31 17:07:04,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1244 places, 5235 transitions, 213399 flow [2024-01-31 17:07:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-01-31 17:07:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2024-01-31 17:07:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 1159 transitions. [2024-01-31 17:07:04,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3651543793320731 [2024-01-31 17:07:04,738 INFO L175 Difference]: Start difference. First operand has 1111 places, 3636 transitions, 147485 flow. Second operand 138 states and 1159 transitions. [2024-01-31 17:07:04,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1244 places, 5235 transitions, 213399 flow [2024-01-31 17:07:42,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1216 places, 5235 transitions, 211890 flow, removed 556 selfloop flow, removed 28 redundant places. [2024-01-31 17:07:42,758 INFO L231 Difference]: Finished difference. Result has 1266 places, 4847 transitions, 208379 flow [2024-01-31 17:07:42,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=146315, PETRI_DIFFERENCE_MINUEND_PLACES=1079, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2841, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=138, PETRI_FLOW=208379, PETRI_PLACES=1266, PETRI_TRANSITIONS=4847} [2024-01-31 17:07:42,761 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1241 predicate places. [2024-01-31 17:07:42,761 INFO L495 AbstractCegarLoop]: Abstraction has has 1266 places, 4847 transitions, 208379 flow [2024-01-31 17:07:42,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 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 17:07:42,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:07:42,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:07:42,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-31 17:07:42,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-31 17:07:42,973 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:07:42,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:07:42,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1196208604, now seen corresponding path program 21 times [2024-01-31 17:07:42,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:07:42,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997754696] [2024-01-31 17:07:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:07:42,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:07:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:07:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:07:43,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:07:43,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997754696] [2024-01-31 17:07:43,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997754696] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:07:43,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323593846] [2024-01-31 17:07:43,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:07:43,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:43,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:07:43,121 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:07:43,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-31 17:07:43,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:07:43,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:07:43,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:07:43,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:07:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:07:43,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:07:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:07:43,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323593846] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:07:43,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:07:43,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-31 17:07:43,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137069949] [2024-01-31 17:07:43,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:07:43,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:07:43,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:07:43,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:07:43,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:07:43,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:07:43,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1266 places, 4847 transitions, 208379 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:07:43,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:07:43,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:07:43,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:08:22,023 INFO L124 PetriNetUnfolderBase]: 12369/22352 cut-off events. [2024-01-31 17:08:22,023 INFO L125 PetriNetUnfolderBase]: For 2310679/2310679 co-relation queries the response was YES. [2024-01-31 17:08:22,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391919 conditions, 22352 events. 12369/22352 cut-off events. For 2310679/2310679 co-relation queries the response was YES. Maximal size of possible extension queue 1302. Compared 191852 event pairs, 325 based on Foata normal form. 5/22357 useless extension candidates. Maximal degree in co-relation 391630. Up to 6515 conditions per place. [2024-01-31 17:08:23,073 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1220 selfloop transitions, 4156 changer transitions 19/5396 dead transitions. [2024-01-31 17:08:23,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1418 places, 5396 transitions, 232800 flow [2024-01-31 17:08:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2024-01-31 17:08:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2024-01-31 17:08:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 1219 transitions. [2024-01-31 17:08:23,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33974358974358976 [2024-01-31 17:08:23,076 INFO L175 Difference]: Start difference. First operand has 1266 places, 4847 transitions, 208379 flow. Second operand 156 states and 1219 transitions. [2024-01-31 17:08:23,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1418 places, 5396 transitions, 232800 flow [2024-01-31 17:09:23,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1377 places, 5396 transitions, 230990 flow, removed 726 selfloop flow, removed 41 redundant places. [2024-01-31 17:09:23,166 INFO L231 Difference]: Finished difference. Result has 1398 places, 5077 transitions, 227582 flow [2024-01-31 17:09:23,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=206823, PETRI_DIFFERENCE_MINUEND_PLACES=1222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3928, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=156, PETRI_FLOW=227582, PETRI_PLACES=1398, PETRI_TRANSITIONS=5077} [2024-01-31 17:09:23,169 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1373 predicate places. [2024-01-31 17:09:23,170 INFO L495 AbstractCegarLoop]: Abstraction has has 1398 places, 5077 transitions, 227582 flow [2024-01-31 17:09:23,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:09:23,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:09:23,170 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 17:09:23,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-31 17:09:23,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:09:23,372 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:09:23,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:09:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1566210251, now seen corresponding path program 3 times [2024-01-31 17:09:23,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:09:23,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981484405] [2024-01-31 17:09:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:09:23,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:09:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:09:23,497 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 17:09:23,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:09:23,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981484405] [2024-01-31 17:09:23,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981484405] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:09:23,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601348508] [2024-01-31 17:09:23,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:09:23,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:09:23,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:09:23,498 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:09:23,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-31 17:09:23,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:09:23,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:09:23,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:09:23,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:09:23,724 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 17:09:23,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:09:23,864 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 17:09:23,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601348508] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:09:23,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:09:23,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-01-31 17:09:23,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357298090] [2024-01-31 17:09:23,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:09:23,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 17:09:23,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:09:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 17:09:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2024-01-31 17:09:23,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:09:23,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1398 places, 5077 transitions, 227582 flow. Second operand has 30 states, 30 states have (on average 4.4) internal successors, (132), 30 states have internal predecessors, (132), 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 17:09:23,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:09:23,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:09:23,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand