./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1.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.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.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-figure1.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 17:04:13,550 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:04:13,624 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:04:13,629 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:04:13,629 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:04:13,652 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:04:13,653 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:04:13,653 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:04:13,654 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:04:13,657 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:04:13,657 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:04:13,657 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:04:13,658 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:04:13,659 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:04:13,659 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:04:13,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:04:13,660 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:04:13,660 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:04:13,660 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:04:13,660 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:04:13,660 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:04:13,661 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:04:13,661 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:04:13,661 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:04:13,661 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:04:13,661 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:04:13,662 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:04:13,662 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:04:13,662 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:04:13,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:04:13,663 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:04:13,663 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:04:13,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:04:13,664 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:04:13,664 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:04:13,664 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:04:13,664 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:04:13,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:04:13,665 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:04:13,665 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:04:13,665 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:04:13,665 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:04:13,665 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:04:13,665 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:04:13,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:04:13,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:04:13,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:04:13,870 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:04:13,870 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:04:13,871 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2024-01-31 17:04:14,835 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:04:15,009 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:04:15,010 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2024-01-31 17:04:15,019 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d1c2cd0f/6dc54467d71f4185925e3702c6706f56/FLAGd95e03beb [2024-01-31 17:04:15,034 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d1c2cd0f/6dc54467d71f4185925e3702c6706f56 [2024-01-31 17:04:15,037 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:04:15,038 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:04:15,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-figure1.wvr.yml/witness.yml [2024-01-31 17:04:15,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:04:15,121 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:04:15,122 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:04:15,122 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:04:15,125 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:04:15,126 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:04:15" (1/2) ... [2024-01-31 17:04:15,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@200fdc65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:04:15, skipping insertion in model container [2024-01-31 17:04:15,127 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:04:15" (1/2) ... [2024-01-31 17:04:15,128 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@40c92f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:04:15, skipping insertion in model container [2024-01-31 17:04:15,129 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:04:15" (2/2) ... [2024-01-31 17:04:15,129 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@200fdc65 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:15, skipping insertion in model container [2024-01-31 17:04:15,130 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:04:15" (2/2) ... [2024-01-31 17:04:15,130 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:04:15,149 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:04:15,165 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:04:15,287 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.wvr.c[2017,2030] [2024-01-31 17:04:15,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:04:15,296 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:04:15,311 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.wvr.c[2017,2030] [2024-01-31 17:04:15,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:04:15,323 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:04:15,323 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:04:15 WrapperNode [2024-01-31 17:04:15,323 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:04:15,324 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:04:15,324 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:04:15,324 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:04:15,329 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 05:04:15" (1/1) ... [2024-01-31 17:04:15,333 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 05:04:15" (1/1) ... [2024-01-31 17:04:15,351 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2024-01-31 17:04:15,352 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:04:15,353 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:04:15,353 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:04:15,353 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:04:15,360 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 05:04:15" (1/1) ... [2024-01-31 17:04:15,360 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 05:04:15" (1/1) ... [2024-01-31 17:04:15,371 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 05:04:15" (1/1) ... [2024-01-31 17:04:15,392 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 17:04:15,392 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 05:04:15" (1/1) ... [2024-01-31 17:04:15,393 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 05:04:15" (1/1) ... [2024-01-31 17:04:15,400 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 05:04:15" (1/1) ... [2024-01-31 17:04:15,403 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 05:04:15" (1/1) ... [2024-01-31 17:04:15,404 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 05:04:15" (1/1) ... [2024-01-31 17:04:15,404 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 05:04:15" (1/1) ... [2024-01-31 17:04:15,406 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:04:15,406 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:04:15,406 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:04:15,407 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:04:15,407 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 05:04:15" (1/1) ... [2024-01-31 17:04:15,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:04:15,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:15,433 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 17:04:15,451 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 17:04:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:04:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:04:15,465 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:04:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:04:15,465 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:04:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:04:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:04:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:04:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:04:15,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:04:15,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:04:15,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:04:15,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:04:15,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:04:15,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:04:15,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:04:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:04:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:04:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:04:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:04:15,469 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 17:04:15,558 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:04:15,560 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:04:15,733 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:04:15,734 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:04:15,859 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:04:15,859 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 17:04:15,861 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:04:15 BoogieIcfgContainer [2024-01-31 17:04:15,861 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:04:15,865 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:04:15,865 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:04:15,867 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:04:15,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:04:15" (1/4) ... [2024-01-31 17:04:15,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451a578c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:04:15, skipping insertion in model container [2024-01-31 17:04:15,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:04:15" (2/4) ... [2024-01-31 17:04:15,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451a578c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:04:15, skipping insertion in model container [2024-01-31 17:04:15,868 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 05:04:15" (3/4) ... [2024-01-31 17:04:15,869 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451a578c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:04:15, skipping insertion in model container [2024-01-31 17:04:15,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:04:15" (4/4) ... [2024-01-31 17:04:15,870 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2024-01-31 17:04:15,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:04:15,882 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:04:15,882 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:04:15,915 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:04:15,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2024-01-31 17:04:15,957 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-01-31 17:04:15,958 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:04:15,959 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 17:04:15,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2024-01-31 17:04:15,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2024-01-31 17:04:15,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:04:15,971 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;@d72f990, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:04:15,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:04:15,977 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:04:15,977 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-01-31 17:04:15,977 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:04:15,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:15,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:15,978 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 17:04:15,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash -760149179, now seen corresponding path program 1 times [2024-01-31 17:04:15,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:15,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800510218] [2024-01-31 17:04:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:15,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:16,203 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 17:04:16,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:16,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800510218] [2024-01-31 17:04:16,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800510218] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:16,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:16,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:04:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806502742] [2024-01-31 17:04:16,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:16,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:04:16,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:16,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:04:16,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:04:16,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-31 17:04:16,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:16,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:16,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-31 17:04:16,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:16,332 INFO L124 PetriNetUnfolderBase]: 82/168 cut-off events. [2024-01-31 17:04:16,332 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-01-31 17:04:16,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 168 events. 82/168 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 526 event pairs, 30 based on Foata normal form. 6/173 useless extension candidates. Maximal degree in co-relation 271. Up to 99 conditions per place. [2024-01-31 17:04:16,336 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 21 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2024-01-31 17:04:16,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 135 flow [2024-01-31 17:04:16,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:04:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:04:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-01-31 17:04:16,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-01-31 17:04:16,346 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 3 states and 44 transitions. [2024-01-31 17:04:16,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 135 flow [2024-01-31 17:04:16,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:04:16,351 INFO L231 Difference]: Finished difference. Result has 24 places, 21 transitions, 58 flow [2024-01-31 17:04:16,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2024-01-31 17:04:16,356 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2024-01-31 17:04:16,356 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 58 flow [2024-01-31 17:04:16,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:16,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:16,357 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 17:04:16,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:04:16,357 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 17:04:16,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:16,358 INFO L85 PathProgramCache]: Analyzing trace with hash -985292509, now seen corresponding path program 1 times [2024-01-31 17:04:16,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:16,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407836461] [2024-01-31 17:04:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:16,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:16,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:16,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407836461] [2024-01-31 17:04:16,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407836461] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:16,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:16,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:04:16,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788865897] [2024-01-31 17:04:16,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:16,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:04:16,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:16,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:04:16,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:04:16,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:16,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:16,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:16,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:16,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:16,691 INFO L124 PetriNetUnfolderBase]: 138/262 cut-off events. [2024-01-31 17:04:16,691 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-01-31 17:04:16,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 262 events. 138/262 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 999 event pairs, 59 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 193. Up to 174 conditions per place. [2024-01-31 17:04:16,693 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 31 selfloop transitions, 7 changer transitions 3/43 dead transitions. [2024-01-31 17:04:16,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 43 transitions, 195 flow [2024-01-31 17:04:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:04:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:04:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-01-31 17:04:16,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5391304347826087 [2024-01-31 17:04:16,695 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 58 flow. Second operand 5 states and 62 transitions. [2024-01-31 17:04:16,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 43 transitions, 195 flow [2024-01-31 17:04:16,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:04:16,696 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 108 flow [2024-01-31 17:04:16,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2024-01-31 17:04:16,697 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2024-01-31 17:04:16,697 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 108 flow [2024-01-31 17:04:16,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:16,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:16,698 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 17:04:16,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:04:16,698 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 17:04:16,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:16,701 INFO L85 PathProgramCache]: Analyzing trace with hash -692240137, now seen corresponding path program 2 times [2024-01-31 17:04:16,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:16,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746408172] [2024-01-31 17:04:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:16,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:16,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:16,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746408172] [2024-01-31 17:04:16,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746408172] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:16,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:16,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:04:16,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925173260] [2024-01-31 17:04:16,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:16,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:04:16,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:16,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:04:16,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:04:16,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:16,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 17:04:16,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:16,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:16,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:16,991 INFO L124 PetriNetUnfolderBase]: 156/300 cut-off events. [2024-01-31 17:04:16,992 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2024-01-31 17:04:16,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 300 events. 156/300 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1186 event pairs, 4 based on Foata normal form. 14/314 useless extension candidates. Maximal degree in co-relation 357. Up to 130 conditions per place. [2024-01-31 17:04:16,999 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 46 selfloop transitions, 10 changer transitions 1/59 dead transitions. [2024-01-31 17:04:16,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 59 transitions, 339 flow [2024-01-31 17:04:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:04:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:04:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-01-31 17:04:17,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093167701863354 [2024-01-31 17:04:17,003 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 108 flow. Second operand 7 states and 82 transitions. [2024-01-31 17:04:17,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 59 transitions, 339 flow [2024-01-31 17:04:17,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 59 transitions, 337 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-01-31 17:04:17,007 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 188 flow [2024-01-31 17:04:17,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-01-31 17:04:17,008 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2024-01-31 17:04:17,008 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 188 flow [2024-01-31 17:04:17,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 17:04:17,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:17,009 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 17:04:17,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:04:17,009 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 17:04:17,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:17,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2010766619, now seen corresponding path program 3 times [2024-01-31 17:04:17,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:17,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243845158] [2024-01-31 17:04:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:17,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:17,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:17,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243845158] [2024-01-31 17:04:17,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243845158] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:17,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:17,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:04:17,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702731555] [2024-01-31 17:04:17,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:17,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:04:17,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:17,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:04:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:04:17,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:17,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:17,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:17,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:17,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:17,234 INFO L124 PetriNetUnfolderBase]: 206/393 cut-off events. [2024-01-31 17:04:17,234 INFO L125 PetriNetUnfolderBase]: For 624/624 co-relation queries the response was YES. [2024-01-31 17:04:17,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1355 conditions, 393 events. 206/393 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1620 event pairs, 66 based on Foata normal form. 2/395 useless extension candidates. Maximal degree in co-relation 889. Up to 176 conditions per place. [2024-01-31 17:04:17,237 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 47 selfloop transitions, 10 changer transitions 2/61 dead transitions. [2024-01-31 17:04:17,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 445 flow [2024-01-31 17:04:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:04:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:04:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-01-31 17:04:17,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2024-01-31 17:04:17,240 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 188 flow. Second operand 5 states and 61 transitions. [2024-01-31 17:04:17,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 445 flow [2024-01-31 17:04:17,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:04:17,244 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 239 flow [2024-01-31 17:04:17,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2024-01-31 17:04:17,245 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 22 predicate places. [2024-01-31 17:04:17,245 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 239 flow [2024-01-31 17:04:17,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:17,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:17,245 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 17:04:17,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:04:17,246 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 17:04:17,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:17,246 INFO L85 PathProgramCache]: Analyzing trace with hash -39175267, now seen corresponding path program 4 times [2024-01-31 17:04:17,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:17,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900090256] [2024-01-31 17:04:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:17,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:17,307 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 17:04:17,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:17,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900090256] [2024-01-31 17:04:17,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900090256] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:17,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608479152] [2024-01-31 17:04:17,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:04:17,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:17,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:17,309 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 17:04:17,315 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 17:04:17,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:04:17,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:17,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 17:04:17,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:17,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:17,499 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 17:04:17,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608479152] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:17,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:17,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-01-31 17:04:17,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489704392] [2024-01-31 17:04:17,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:17,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 17:04:17,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:17,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 17:04:17,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-01-31 17:04:17,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:17,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 239 flow. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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 17:04:17,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:17,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:17,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:17,785 INFO L124 PetriNetUnfolderBase]: 383/674 cut-off events. [2024-01-31 17:04:17,785 INFO L125 PetriNetUnfolderBase]: For 1507/1507 co-relation queries the response was YES. [2024-01-31 17:04:17,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2448 conditions, 674 events. 383/674 cut-off events. For 1507/1507 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2846 event pairs, 30 based on Foata normal form. 14/688 useless extension candidates. Maximal degree in co-relation 2102. Up to 155 conditions per place. [2024-01-31 17:04:17,788 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 77 selfloop transitions, 40 changer transitions 1/119 dead transitions. [2024-01-31 17:04:17,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 119 transitions, 900 flow [2024-01-31 17:04:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:04:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:04:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 153 transitions. [2024-01-31 17:04:17,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434782608695652 [2024-01-31 17:04:17,791 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 239 flow. Second operand 15 states and 153 transitions. [2024-01-31 17:04:17,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 119 transitions, 900 flow [2024-01-31 17:04:17,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 119 transitions, 862 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-01-31 17:04:17,795 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 558 flow [2024-01-31 17:04:17,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=558, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-01-31 17:04:17,796 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2024-01-31 17:04:17,796 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 558 flow [2024-01-31 17:04:17,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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 17:04:17,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:17,796 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 17:04:17,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 17:04:18,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:18,005 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 17:04:18,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1995949459, now seen corresponding path program 5 times [2024-01-31 17:04:18,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:18,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462281616] [2024-01-31 17:04:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:18,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:18,057 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 17:04:18,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:18,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462281616] [2024-01-31 17:04:18,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462281616] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:18,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42690627] [2024-01-31 17:04:18,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:04:18,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:18,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:18,059 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 17:04:18,088 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 17:04:18,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:18,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:18,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 17:04:18,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:18,144 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 17:04:18,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:18,162 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 17:04:18,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42690627] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:18,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:18,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-01-31 17:04:18,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515188180] [2024-01-31 17:04:18,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:18,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 17:04:18,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:18,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 17:04:18,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-01-31 17:04:18,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:18,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 558 flow. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 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 17:04:18,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:18,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:18,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:18,312 INFO L124 PetriNetUnfolderBase]: 368/657 cut-off events. [2024-01-31 17:04:18,312 INFO L125 PetriNetUnfolderBase]: For 3036/3036 co-relation queries the response was YES. [2024-01-31 17:04:18,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 657 events. 368/657 cut-off events. For 3036/3036 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2838 event pairs, 63 based on Foata normal form. 14/671 useless extension candidates. Maximal degree in co-relation 2469. Up to 243 conditions per place. [2024-01-31 17:04:18,316 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 69 selfloop transitions, 37 changer transitions 1/108 dead transitions. [2024-01-31 17:04:18,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 108 transitions, 1057 flow [2024-01-31 17:04:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:04:18,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:04:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-01-31 17:04:18,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054347826086957 [2024-01-31 17:04:18,318 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 558 flow. Second operand 8 states and 93 transitions. [2024-01-31 17:04:18,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 108 transitions, 1057 flow [2024-01-31 17:04:18,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 108 transitions, 918 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-01-31 17:04:18,326 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 680 flow [2024-01-31 17:04:18,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=680, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-01-31 17:04:18,326 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2024-01-31 17:04:18,327 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 680 flow [2024-01-31 17:04:18,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 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 17:04:18,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:18,327 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 17:04:18,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-31 17:04:18,538 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,SelfDestructingSolverStorable5 [2024-01-31 17:04:18,538 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 17:04:18,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:18,538 INFO L85 PathProgramCache]: Analyzing trace with hash 328929709, now seen corresponding path program 6 times [2024-01-31 17:04:18,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:18,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000332098] [2024-01-31 17:04:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:18,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:18,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:18,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000332098] [2024-01-31 17:04:18,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000332098] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:18,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:18,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:04:18,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562944914] [2024-01-31 17:04:18,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:18,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:04:18,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:04:18,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:04:18,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2024-01-31 17:04:18,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 680 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:18,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:18,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2024-01-31 17:04:18,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:18,692 INFO L124 PetriNetUnfolderBase]: 297/551 cut-off events. [2024-01-31 17:04:18,693 INFO L125 PetriNetUnfolderBase]: For 2740/2746 co-relation queries the response was YES. [2024-01-31 17:04:18,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2379 conditions, 551 events. 297/551 cut-off events. For 2740/2746 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2387 event pairs, 80 based on Foata normal form. 2/544 useless extension candidates. Maximal degree in co-relation 2177. Up to 284 conditions per place. [2024-01-31 17:04:18,696 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 50 selfloop transitions, 22 changer transitions 2/86 dead transitions. [2024-01-31 17:04:18,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 891 flow [2024-01-31 17:04:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:04:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:04:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2024-01-31 17:04:18,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956521739130435 [2024-01-31 17:04:18,697 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 680 flow. Second operand 5 states and 57 transitions. [2024-01-31 17:04:18,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 891 flow [2024-01-31 17:04:18,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 86 transitions, 822 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-01-31 17:04:18,702 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 649 flow [2024-01-31 17:04:18,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=649, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-01-31 17:04:18,703 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2024-01-31 17:04:18,703 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 649 flow [2024-01-31 17:04:18,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:18,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:18,703 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 17:04:18,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 17:04:18,704 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 17:04:18,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:18,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1322100768, now seen corresponding path program 1 times [2024-01-31 17:04:18,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:18,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870971464] [2024-01-31 17:04:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:18,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:18,786 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 17:04:18,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:18,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870971464] [2024-01-31 17:04:18,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870971464] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:18,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414157681] [2024-01-31 17:04:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:18,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:18,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:18,797 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 17:04:18,798 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 17:04:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:18,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:18,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:18,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:18,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414157681] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:18,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:18,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 5 [2024-01-31 17:04:18,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001370135] [2024-01-31 17:04:18,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:18,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:04:18,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:18,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:04:18,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:04:18,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-31 17:04:18,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 649 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 17:04:18,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:18,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-31 17:04:18,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:19,007 INFO L124 PetriNetUnfolderBase]: 479/941 cut-off events. [2024-01-31 17:04:19,007 INFO L125 PetriNetUnfolderBase]: For 4472/4485 co-relation queries the response was YES. [2024-01-31 17:04:19,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3852 conditions, 941 events. 479/941 cut-off events. For 4472/4485 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4870 event pairs, 76 based on Foata normal form. 19/955 useless extension candidates. Maximal degree in co-relation 2874. Up to 367 conditions per place. [2024-01-31 17:04:19,013 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 94 selfloop transitions, 5 changer transitions 16/133 dead transitions. [2024-01-31 17:04:19,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 133 transitions, 1419 flow [2024-01-31 17:04:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:04:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:04:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-01-31 17:04:19,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-01-31 17:04:19,014 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 649 flow. Second operand 4 states and 65 transitions. [2024-01-31 17:04:19,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 133 transitions, 1419 flow [2024-01-31 17:04:19,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 133 transitions, 1327 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-01-31 17:04:19,022 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 634 flow [2024-01-31 17:04:19,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=634, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-01-31 17:04:19,022 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 48 predicate places. [2024-01-31 17:04:19,022 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 634 flow [2024-01-31 17:04:19,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 17:04:19,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:19,023 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:19,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:04:19,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:19,234 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 17:04:19,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:19,234 INFO L85 PathProgramCache]: Analyzing trace with hash 596779484, now seen corresponding path program 2 times [2024-01-31 17:04:19,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:19,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119674040] [2024-01-31 17:04:19,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:19,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:19,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:19,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119674040] [2024-01-31 17:04:19,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119674040] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:19,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608498908] [2024-01-31 17:04:19,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:04:19,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:19,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:19,306 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 17:04:19,336 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 17:04:19,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:19,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:19,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:19,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:19,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:04:19,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608498908] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:19,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:19,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-31 17:04:19,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446240652] [2024-01-31 17:04:19,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:19,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:04:19,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:04:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:04:19,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:19,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 634 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 17:04:19,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:19,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:19,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:19,754 INFO L124 PetriNetUnfolderBase]: 1136/1892 cut-off events. [2024-01-31 17:04:19,754 INFO L125 PetriNetUnfolderBase]: For 7026/7026 co-relation queries the response was YES. [2024-01-31 17:04:19,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8185 conditions, 1892 events. 1136/1892 cut-off events. For 7026/7026 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8888 event pairs, 138 based on Foata normal form. 12/1886 useless extension candidates. Maximal degree in co-relation 6376. Up to 509 conditions per place. [2024-01-31 17:04:19,766 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 133 selfloop transitions, 55 changer transitions 3/192 dead transitions. [2024-01-31 17:04:19,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 192 transitions, 1815 flow [2024-01-31 17:04:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:04:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:04:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 157 transitions. [2024-01-31 17:04:19,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48757763975155277 [2024-01-31 17:04:19,769 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 634 flow. Second operand 14 states and 157 transitions. [2024-01-31 17:04:19,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 192 transitions, 1815 flow [2024-01-31 17:04:19,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 192 transitions, 1775 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-01-31 17:04:19,779 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 1021 flow [2024-01-31 17:04:19,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1021, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-01-31 17:04:19,780 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2024-01-31 17:04:19,780 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 1021 flow [2024-01-31 17:04:19,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 17:04:19,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:19,781 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:19,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:04:19,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:19,992 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 17:04:19,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:19,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1383073420, now seen corresponding path program 3 times [2024-01-31 17:04:19,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:19,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863806037] [2024-01-31 17:04:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:20,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:20,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863806037] [2024-01-31 17:04:20,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863806037] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:20,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839561043] [2024-01-31 17:04:20,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:04:20,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:20,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:20,044 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 17:04:20,064 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 17:04:20,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:04:20,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:20,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:20,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:20,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:20,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839561043] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:20,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:20,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-01-31 17:04:20,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365225677] [2024-01-31 17:04:20,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:20,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 17:04:20,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 17:04:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-01-31 17:04:20,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:20,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 1021 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 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 17:04:20,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:20,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:20,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:20,579 INFO L124 PetriNetUnfolderBase]: 1405/2346 cut-off events. [2024-01-31 17:04:20,580 INFO L125 PetriNetUnfolderBase]: For 12983/12983 co-relation queries the response was YES. [2024-01-31 17:04:20,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11473 conditions, 2346 events. 1405/2346 cut-off events. For 12983/12983 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11602 event pairs, 71 based on Foata normal form. 38/2384 useless extension candidates. Maximal degree in co-relation 9134. Up to 614 conditions per place. [2024-01-31 17:04:20,595 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 101 selfloop transitions, 98 changer transitions 29/229 dead transitions. [2024-01-31 17:04:20,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 229 transitions, 2421 flow [2024-01-31 17:04:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:04:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:04:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 153 transitions. [2024-01-31 17:04:20,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434782608695652 [2024-01-31 17:04:20,596 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 1021 flow. Second operand 15 states and 153 transitions. [2024-01-31 17:04:20,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 229 transitions, 2421 flow [2024-01-31 17:04:20,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 229 transitions, 2299 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-01-31 17:04:20,618 INFO L231 Difference]: Finished difference. Result has 110 places, 141 transitions, 1659 flow [2024-01-31 17:04:20,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1659, PETRI_PLACES=110, PETRI_TRANSITIONS=141} [2024-01-31 17:04:20,619 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 85 predicate places. [2024-01-31 17:04:20,619 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 141 transitions, 1659 flow [2024-01-31 17:04:20,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 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 17:04:20,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:20,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:20,633 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 17:04:20,830 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,SelfDestructingSolverStorable9 [2024-01-31 17:04:20,830 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 17:04:20,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash -803626312, now seen corresponding path program 4 times [2024-01-31 17:04:20,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:20,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927659417] [2024-01-31 17:04:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:20,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:20,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:20,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927659417] [2024-01-31 17:04:20,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927659417] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:20,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292528579] [2024-01-31 17:04:20,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:04:20,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:20,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:20,881 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 17:04:20,905 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 17:04:20,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:04:20,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:20,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:20,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:20,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:20,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292528579] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:20,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:20,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:04:20,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005383878] [2024-01-31 17:04:20,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:20,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:04:20,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:04:20,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:04:20,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:20,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 141 transitions, 1659 flow. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 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 17:04:20,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:20,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:20,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:21,427 INFO L124 PetriNetUnfolderBase]: 1757/2921 cut-off events. [2024-01-31 17:04:21,427 INFO L125 PetriNetUnfolderBase]: For 25153/25153 co-relation queries the response was YES. [2024-01-31 17:04:21,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15958 conditions, 2921 events. 1757/2921 cut-off events. For 25153/25153 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15051 event pairs, 140 based on Foata normal form. 18/2939 useless extension candidates. Maximal degree in co-relation 15267. Up to 581 conditions per place. [2024-01-31 17:04:21,451 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 152 selfloop transitions, 107 changer transitions 3/263 dead transitions. [2024-01-31 17:04:21,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 263 transitions, 3258 flow [2024-01-31 17:04:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 17:04:21,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 17:04:21,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 170 transitions. [2024-01-31 17:04:21,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2024-01-31 17:04:21,453 INFO L175 Difference]: Start difference. First operand has 110 places, 141 transitions, 1659 flow. Second operand 17 states and 170 transitions. [2024-01-31 17:04:21,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 263 transitions, 3258 flow [2024-01-31 17:04:21,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 263 transitions, 3094 flow, removed 48 selfloop flow, removed 1 redundant places. [2024-01-31 17:04:21,550 INFO L231 Difference]: Finished difference. Result has 130 places, 178 transitions, 2253 flow [2024-01-31 17:04:21,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2253, PETRI_PLACES=130, PETRI_TRANSITIONS=178} [2024-01-31 17:04:21,551 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 105 predicate places. [2024-01-31 17:04:21,551 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 178 transitions, 2253 flow [2024-01-31 17:04:21,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 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 17:04:21,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:21,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:21,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:04:21,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:21,765 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 17:04:21,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:21,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1985844006, now seen corresponding path program 5 times [2024-01-31 17:04:21,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:21,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89856492] [2024-01-31 17:04:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:21,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:21,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:21,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89856492] [2024-01-31 17:04:21,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89856492] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:21,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328375099] [2024-01-31 17:04:21,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:04:21,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:21,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:21,813 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 17:04:21,838 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 17:04:21,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:04:21,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:21,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:21,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:21,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:21,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328375099] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:21,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:21,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 17:04:21,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750895544] [2024-01-31 17:04:21,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:21,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:04:21,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:21,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:04:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:04:21,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:21,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 178 transitions, 2253 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 17:04:21,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:21,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:21,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:22,551 INFO L124 PetriNetUnfolderBase]: 2272/3766 cut-off events. [2024-01-31 17:04:22,551 INFO L125 PetriNetUnfolderBase]: For 40800/40800 co-relation queries the response was YES. [2024-01-31 17:04:22,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22125 conditions, 3766 events. 2272/3766 cut-off events. For 40800/40800 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20425 event pairs, 76 based on Foata normal form. 94/3860 useless extension candidates. Maximal degree in co-relation 21235. Up to 1175 conditions per place. [2024-01-31 17:04:22,580 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 145 selfloop transitions, 169 changer transitions 2/317 dead transitions. [2024-01-31 17:04:22,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 317 transitions, 4161 flow [2024-01-31 17:04:22,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:04:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:04:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 169 transitions. [2024-01-31 17:04:22,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4592391304347826 [2024-01-31 17:04:22,582 INFO L175 Difference]: Start difference. First operand has 130 places, 178 transitions, 2253 flow. Second operand 16 states and 169 transitions. [2024-01-31 17:04:22,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 317 transitions, 4161 flow [2024-01-31 17:04:22,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 317 transitions, 3865 flow, removed 101 selfloop flow, removed 3 redundant places. [2024-01-31 17:04:22,668 INFO L231 Difference]: Finished difference. Result has 153 places, 231 transitions, 3376 flow [2024-01-31 17:04:22,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3376, PETRI_PLACES=153, PETRI_TRANSITIONS=231} [2024-01-31 17:04:22,668 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 128 predicate places. [2024-01-31 17:04:22,668 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 231 transitions, 3376 flow [2024-01-31 17:04:22,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 17:04:22,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:22,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:22,688 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 17:04:22,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:22,889 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 17:04:22,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:22,889 INFO L85 PathProgramCache]: Analyzing trace with hash -974719262, now seen corresponding path program 6 times [2024-01-31 17:04:22,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:22,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444612886] [2024-01-31 17:04:22,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:22,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:22,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:22,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444612886] [2024-01-31 17:04:22,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444612886] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:22,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028539703] [2024-01-31 17:04:22,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:04:22,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:22,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:22,938 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 17:04:22,940 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 17:04:22,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 17:04:22,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:22,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:22,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:23,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:23,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028539703] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:23,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:23,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 17:04:23,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191039770] [2024-01-31 17:04:23,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:23,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:04:23,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:23,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:04:23,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:04:23,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:23,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 231 transitions, 3376 flow. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 17:04:23,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:23,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:23,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:23,834 INFO L124 PetriNetUnfolderBase]: 2630/4352 cut-off events. [2024-01-31 17:04:23,834 INFO L125 PetriNetUnfolderBase]: For 61926/61926 co-relation queries the response was YES. [2024-01-31 17:04:23,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27300 conditions, 4352 events. 2630/4352 cut-off events. For 61926/61926 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 24231 event pairs, 87 based on Foata normal form. 94/4446 useless extension candidates. Maximal degree in co-relation 26659. Up to 759 conditions per place. [2024-01-31 17:04:23,878 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 175 selfloop transitions, 219 changer transitions 3/398 dead transitions. [2024-01-31 17:04:23,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 398 transitions, 5689 flow [2024-01-31 17:04:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:04:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:04:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 258 transitions. [2024-01-31 17:04:23,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431438127090301 [2024-01-31 17:04:23,880 INFO L175 Difference]: Start difference. First operand has 153 places, 231 transitions, 3376 flow. Second operand 26 states and 258 transitions. [2024-01-31 17:04:23,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 398 transitions, 5689 flow [2024-01-31 17:04:24,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 398 transitions, 5608 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-01-31 17:04:24,036 INFO L231 Difference]: Finished difference. Result has 189 places, 276 transitions, 4781 flow [2024-01-31 17:04:24,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4781, PETRI_PLACES=189, PETRI_TRANSITIONS=276} [2024-01-31 17:04:24,036 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 164 predicate places. [2024-01-31 17:04:24,036 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 276 transitions, 4781 flow [2024-01-31 17:04:24,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 17:04:24,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:24,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:24,051 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 17:04:24,248 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,SelfDestructingSolverStorable12 [2024-01-31 17:04:24,249 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 17:04:24,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:24,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1987411794, now seen corresponding path program 7 times [2024-01-31 17:04:24,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:24,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672309400] [2024-01-31 17:04:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:24,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:24,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:24,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672309400] [2024-01-31 17:04:24,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672309400] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:24,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116647886] [2024-01-31 17:04:24,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:04:24,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:24,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:24,318 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 17:04:24,322 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 17:04:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:24,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:24,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:24,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:24,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116647886] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:24,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:24,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 17:04:24,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997528065] [2024-01-31 17:04:24,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:24,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:04:24,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:24,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:04:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:04:24,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:24,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 276 transitions, 4781 flow. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 17:04:24,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:24,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:24,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:25,131 INFO L124 PetriNetUnfolderBase]: 2635/4371 cut-off events. [2024-01-31 17:04:25,131 INFO L125 PetriNetUnfolderBase]: For 94908/94908 co-relation queries the response was YES. [2024-01-31 17:04:25,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31537 conditions, 4371 events. 2635/4371 cut-off events. For 94908/94908 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 24652 event pairs, 312 based on Foata normal form. 8/4379 useless extension candidates. Maximal degree in co-relation 30771. Up to 1053 conditions per place. [2024-01-31 17:04:25,174 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 190 selfloop transitions, 154 changer transitions 3/348 dead transitions. [2024-01-31 17:04:25,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 348 transitions, 6152 flow [2024-01-31 17:04:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:04:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:04:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 142 transitions. [2024-01-31 17:04:25,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47491638795986624 [2024-01-31 17:04:25,175 INFO L175 Difference]: Start difference. First operand has 189 places, 276 transitions, 4781 flow. Second operand 13 states and 142 transitions. [2024-01-31 17:04:25,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 348 transitions, 6152 flow [2024-01-31 17:04:25,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 348 transitions, 5846 flow, removed 80 selfloop flow, removed 13 redundant places. [2024-01-31 17:04:25,496 INFO L231 Difference]: Finished difference. Result has 187 places, 275 transitions, 4806 flow [2024-01-31 17:04:25,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4459, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4806, PETRI_PLACES=187, PETRI_TRANSITIONS=275} [2024-01-31 17:04:25,496 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 162 predicate places. [2024-01-31 17:04:25,496 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 275 transitions, 4806 flow [2024-01-31 17:04:25,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 17:04:25,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:25,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:25,508 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 17:04:25,704 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,SelfDestructingSolverStorable13 [2024-01-31 17:04:25,705 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 17:04:25,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:25,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2015572216, now seen corresponding path program 8 times [2024-01-31 17:04:25,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:25,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976921715] [2024-01-31 17:04:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:25,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976921715] [2024-01-31 17:04:25,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976921715] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662274367] [2024-01-31 17:04:25,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:04:25,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:25,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:25,761 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 17:04:25,763 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 17:04:25,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:25,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:25,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:25,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:25,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:25,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662274367] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:25,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:25,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-31 17:04:25,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972905312] [2024-01-31 17:04:25,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:25,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:04:25,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:04:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:04:25,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:25,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 275 transitions, 4806 flow. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 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 17:04:25,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:25,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:25,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:26,826 INFO L124 PetriNetUnfolderBase]: 2996/4964 cut-off events. [2024-01-31 17:04:26,827 INFO L125 PetriNetUnfolderBase]: For 117883/117883 co-relation queries the response was YES. [2024-01-31 17:04:26,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36584 conditions, 4964 events. 2996/4964 cut-off events. For 117883/117883 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 28431 event pairs, 165 based on Foata normal form. 58/5022 useless extension candidates. Maximal degree in co-relation 34489. Up to 931 conditions per place. [2024-01-31 17:04:26,870 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 162 selfloop transitions, 293 changer transitions 6/462 dead transitions. [2024-01-31 17:04:26,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 462 transitions, 7986 flow [2024-01-31 17:04:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:04:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:04:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 247 transitions. [2024-01-31 17:04:26,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2024-01-31 17:04:26,872 INFO L175 Difference]: Start difference. First operand has 187 places, 275 transitions, 4806 flow. Second operand 26 states and 247 transitions. [2024-01-31 17:04:26,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 462 transitions, 7986 flow [2024-01-31 17:04:27,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 462 transitions, 7594 flow, removed 35 selfloop flow, removed 12 redundant places. [2024-01-31 17:04:27,264 INFO L231 Difference]: Finished difference. Result has 206 places, 355 transitions, 6857 flow [2024-01-31 17:04:27,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6857, PETRI_PLACES=206, PETRI_TRANSITIONS=355} [2024-01-31 17:04:27,264 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 181 predicate places. [2024-01-31 17:04:27,264 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 355 transitions, 6857 flow [2024-01-31 17:04:27,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 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 17:04:27,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:27,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:27,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-01-31 17:04:27,465 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,SelfDestructingSolverStorable14 [2024-01-31 17:04:27,465 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 17:04:27,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:27,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1830470982, now seen corresponding path program 9 times [2024-01-31 17:04:27,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:27,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509376224] [2024-01-31 17:04:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:27,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:27,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:27,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509376224] [2024-01-31 17:04:27,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509376224] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:27,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092217851] [2024-01-31 17:04:27,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:04:27,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:27,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:27,543 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 17:04:27,569 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 17:04:27,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:04:27,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:27,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:27,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:27,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:27,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092217851] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:27,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:27,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:04:27,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834821705] [2024-01-31 17:04:27,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:27,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:04:27,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:27,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:04:27,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:04:27,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:27,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 355 transitions, 6857 flow. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:27,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:27,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:27,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:28,933 INFO L124 PetriNetUnfolderBase]: 3435/5773 cut-off events. [2024-01-31 17:04:28,934 INFO L125 PetriNetUnfolderBase]: For 156087/156087 co-relation queries the response was YES. [2024-01-31 17:04:28,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45189 conditions, 5773 events. 3435/5773 cut-off events. For 156087/156087 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 34675 event pairs, 150 based on Foata normal form. 34/5807 useless extension candidates. Maximal degree in co-relation 42162. Up to 1116 conditions per place. [2024-01-31 17:04:28,982 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 249 selfloop transitions, 330 changer transitions 5/585 dead transitions. [2024-01-31 17:04:28,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 585 transitions, 11123 flow [2024-01-31 17:04:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 17:04:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 17:04:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 282 transitions. [2024-01-31 17:04:28,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42278860569715143 [2024-01-31 17:04:28,984 INFO L175 Difference]: Start difference. First operand has 206 places, 355 transitions, 6857 flow. Second operand 29 states and 282 transitions. [2024-01-31 17:04:28,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 585 transitions, 11123 flow [2024-01-31 17:04:29,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 585 transitions, 10672 flow, removed 114 selfloop flow, removed 11 redundant places. [2024-01-31 17:04:29,695 INFO L231 Difference]: Finished difference. Result has 229 places, 430 transitions, 9144 flow [2024-01-31 17:04:29,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9144, PETRI_PLACES=229, PETRI_TRANSITIONS=430} [2024-01-31 17:04:29,695 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 204 predicate places. [2024-01-31 17:04:29,695 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 430 transitions, 9144 flow [2024-01-31 17:04:29,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:29,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:29,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:29,706 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 17:04:29,900 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,SelfDestructingSolverStorable15 [2024-01-31 17:04:29,900 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 17:04:29,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash -546398446, now seen corresponding path program 10 times [2024-01-31 17:04:29,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:29,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391086590] [2024-01-31 17:04:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:29,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:29,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:29,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391086590] [2024-01-31 17:04:29,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391086590] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:29,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535662200] [2024-01-31 17:04:29,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:04:29,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:29,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:29,950 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 17:04:29,951 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 17:04:29,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:04:29,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:29,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:30,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:30,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:30,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535662200] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:30,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:30,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:04:30,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565642806] [2024-01-31 17:04:30,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:30,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:04:30,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:04:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:04:30,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:30,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 430 transitions, 9144 flow. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 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 17:04:30,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:30,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:30,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:31,477 INFO L124 PetriNetUnfolderBase]: 3862/6460 cut-off events. [2024-01-31 17:04:31,477 INFO L125 PetriNetUnfolderBase]: For 217603/217603 co-relation queries the response was YES. [2024-01-31 17:04:31,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53124 conditions, 6460 events. 3862/6460 cut-off events. For 217603/217603 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39515 event pairs, 1364 based on Foata normal form. 18/6478 useless extension candidates. Maximal degree in co-relation 50511. Up to 4947 conditions per place. [2024-01-31 17:04:31,528 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 473 selfloop transitions, 72 changer transitions 2/548 dead transitions. [2024-01-31 17:04:31,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 548 transitions, 11753 flow [2024-01-31 17:04:31,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:04:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:04:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 159 transitions. [2024-01-31 17:04:31,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320652173913043 [2024-01-31 17:04:31,532 INFO L175 Difference]: Start difference. First operand has 229 places, 430 transitions, 9144 flow. Second operand 16 states and 159 transitions. [2024-01-31 17:04:31,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 548 transitions, 11753 flow [2024-01-31 17:04:32,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 548 transitions, 11486 flow, removed 58 selfloop flow, removed 14 redundant places. [2024-01-31 17:04:32,709 INFO L231 Difference]: Finished difference. Result has 236 places, 463 transitions, 9743 flow [2024-01-31 17:04:32,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8895, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9743, PETRI_PLACES=236, PETRI_TRANSITIONS=463} [2024-01-31 17:04:32,709 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 211 predicate places. [2024-01-31 17:04:32,710 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 463 transitions, 9743 flow [2024-01-31 17:04:32,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:32,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:32,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:32,725 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 17:04:32,915 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,SelfDestructingSolverStorable16 [2024-01-31 17:04:32,915 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 17:04:32,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:32,916 INFO L85 PathProgramCache]: Analyzing trace with hash 547418766, now seen corresponding path program 11 times [2024-01-31 17:04:32,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:32,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742240279] [2024-01-31 17:04:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:32,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:32,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:32,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742240279] [2024-01-31 17:04:32,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742240279] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:32,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456030474] [2024-01-31 17:04:32,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:04:32,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:32,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:32,993 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 17:04:32,997 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 17:04:33,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:04:33,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:33,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:33,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:33,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:33,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456030474] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:33,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:33,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:04:33,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877999676] [2024-01-31 17:04:33,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:33,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:04:33,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:04:33,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:04:33,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:33,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 463 transitions, 9743 flow. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:33,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:33,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:33,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:34,660 INFO L124 PetriNetUnfolderBase]: 4237/7063 cut-off events. [2024-01-31 17:04:34,660 INFO L125 PetriNetUnfolderBase]: For 272999/272999 co-relation queries the response was YES. [2024-01-31 17:04:34,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60177 conditions, 7063 events. 4237/7063 cut-off events. For 272999/272999 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 43637 event pairs, 640 based on Foata normal form. 90/7153 useless extension candidates. Maximal degree in co-relation 57525. Up to 3105 conditions per place. [2024-01-31 17:04:34,849 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 364 selfloop transitions, 253 changer transitions 3/621 dead transitions. [2024-01-31 17:04:34,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 621 transitions, 13185 flow [2024-01-31 17:04:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 17:04:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 17:04:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 212 transitions. [2024-01-31 17:04:34,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608695652173913 [2024-01-31 17:04:34,855 INFO L175 Difference]: Start difference. First operand has 236 places, 463 transitions, 9743 flow. Second operand 20 states and 212 transitions. [2024-01-31 17:04:34,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 621 transitions, 13185 flow [2024-01-31 17:04:36,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 621 transitions, 12866 flow, removed 123 selfloop flow, removed 7 redundant places. [2024-01-31 17:04:36,032 INFO L231 Difference]: Finished difference. Result has 260 places, 497 transitions, 11362 flow [2024-01-31 17:04:36,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9459, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11362, PETRI_PLACES=260, PETRI_TRANSITIONS=497} [2024-01-31 17:04:36,033 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 235 predicate places. [2024-01-31 17:04:36,033 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 497 transitions, 11362 flow [2024-01-31 17:04:36,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:36,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:36,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:36,046 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 17:04:36,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 17:04:36,234 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 17:04:36,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:36,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2121657326, now seen corresponding path program 12 times [2024-01-31 17:04:36,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:36,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026116652] [2024-01-31 17:04:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:36,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:36,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:36,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026116652] [2024-01-31 17:04:36,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026116652] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:36,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492266297] [2024-01-31 17:04:36,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:04:36,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:36,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:36,289 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 17:04:36,291 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 17:04:36,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:04:36,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:36,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:36,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:36,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:04:36,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492266297] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:36,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:36,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-31 17:04:36,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520394783] [2024-01-31 17:04:36,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:36,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:04:36,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:36,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:04:36,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:04:36,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:36,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 497 transitions, 11362 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:36,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:36,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:36,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:38,222 INFO L124 PetriNetUnfolderBase]: 4451/7411 cut-off events. [2024-01-31 17:04:38,222 INFO L125 PetriNetUnfolderBase]: For 350053/350053 co-relation queries the response was YES. [2024-01-31 17:04:38,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67882 conditions, 7411 events. 4451/7411 cut-off events. For 350053/350053 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 45921 event pairs, 633 based on Foata normal form. 58/7469 useless extension candidates. Maximal degree in co-relation 67251. Up to 2890 conditions per place. [2024-01-31 17:04:38,308 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 334 selfloop transitions, 284 changer transitions 2/621 dead transitions. [2024-01-31 17:04:38,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 621 transitions, 14335 flow [2024-01-31 17:04:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 17:04:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 17:04:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 191 transitions. [2024-01-31 17:04:38,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152173913043478 [2024-01-31 17:04:38,310 INFO L175 Difference]: Start difference. First operand has 260 places, 497 transitions, 11362 flow. Second operand 20 states and 191 transitions. [2024-01-31 17:04:38,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 621 transitions, 14335 flow [2024-01-31 17:04:39,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 621 transitions, 14038 flow, removed 133 selfloop flow, removed 3 redundant places. [2024-01-31 17:04:39,894 INFO L231 Difference]: Finished difference. Result has 283 places, 520 transitions, 12788 flow [2024-01-31 17:04:39,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11130, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12788, PETRI_PLACES=283, PETRI_TRANSITIONS=520} [2024-01-31 17:04:39,895 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 258 predicate places. [2024-01-31 17:04:39,895 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 520 transitions, 12788 flow [2024-01-31 17:04:39,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 17:04:39,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:39,895 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:39,910 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 17:04:40,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:40,096 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 17:04:40,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:40,096 INFO L85 PathProgramCache]: Analyzing trace with hash -836419310, now seen corresponding path program 13 times [2024-01-31 17:04:40,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:40,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743474756] [2024-01-31 17:04:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:40,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:40,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:40,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743474756] [2024-01-31 17:04:40,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743474756] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:40,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950323072] [2024-01-31 17:04:40,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:04:40,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:40,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:40,155 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 17:04:40,158 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 17:04:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:40,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:40,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:40,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:04:40,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950323072] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:40,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:40,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-31 17:04:40,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775455781] [2024-01-31 17:04:40,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:40,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:04:40,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:04:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:04:40,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:40,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 520 transitions, 12788 flow. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:40,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:40,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:40,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:41,961 INFO L124 PetriNetUnfolderBase]: 4448/7406 cut-off events. [2024-01-31 17:04:41,961 INFO L125 PetriNetUnfolderBase]: For 386092/386092 co-relation queries the response was YES. [2024-01-31 17:04:42,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71159 conditions, 7406 events. 4448/7406 cut-off events. For 386092/386092 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 46167 event pairs, 1649 based on Foata normal form. 8/7414 useless extension candidates. Maximal degree in co-relation 70387. Up to 5976 conditions per place. [2024-01-31 17:04:42,035 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 502 selfloop transitions, 71 changer transitions 2/576 dead transitions. [2024-01-31 17:04:42,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 576 transitions, 14589 flow [2024-01-31 17:04:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 17:04:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 17:04:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-01-31 17:04:42,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624505928853755 [2024-01-31 17:04:42,036 INFO L175 Difference]: Start difference. First operand has 283 places, 520 transitions, 12788 flow. Second operand 11 states and 117 transitions. [2024-01-31 17:04:42,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 576 transitions, 14589 flow [2024-01-31 17:04:43,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 576 transitions, 14375 flow, removed 63 selfloop flow, removed 13 redundant places. [2024-01-31 17:04:43,592 INFO L231 Difference]: Finished difference. Result has 278 places, 517 transitions, 12715 flow [2024-01-31 17:04:43,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12550, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12715, PETRI_PLACES=278, PETRI_TRANSITIONS=517} [2024-01-31 17:04:43,593 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 253 predicate places. [2024-01-31 17:04:43,593 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 517 transitions, 12715 flow [2024-01-31 17:04:43,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 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 17:04:43,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:43,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:43,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 17:04:43,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:43,804 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 17:04:43,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:43,805 INFO L85 PathProgramCache]: Analyzing trace with hash 448322125, now seen corresponding path program 14 times [2024-01-31 17:04:43,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:43,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735659504] [2024-01-31 17:04:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:43,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:04:43,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:43,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735659504] [2024-01-31 17:04:43,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735659504] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:43,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792455747] [2024-01-31 17:04:43,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:04:43,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:43,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:43,912 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 17:04:43,914 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 17:04:43,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:43,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:43,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:04:43,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:04:43,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:04:44,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792455747] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:44,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:44,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-01-31 17:04:44,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576411655] [2024-01-31 17:04:44,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:44,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:04:44,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:44,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:04:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:04:44,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-31 17:04:44,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 517 transitions, 12715 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 17:04:44,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:44,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-31 17:04:44,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:46,308 INFO L124 PetriNetUnfolderBase]: 5900/10686 cut-off events. [2024-01-31 17:04:46,308 INFO L125 PetriNetUnfolderBase]: For 547094/547647 co-relation queries the response was YES. [2024-01-31 17:04:46,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100560 conditions, 10686 events. 5900/10686 cut-off events. For 547094/547647 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 81489 event pairs, 602 based on Foata normal form. 269/10842 useless extension candidates. Maximal degree in co-relation 98709. Up to 2733 conditions per place. [2024-01-31 17:04:46,425 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 898 selfloop transitions, 10 changer transitions 101/1170 dead transitions. [2024-01-31 17:04:46,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 1170 transitions, 31278 flow [2024-01-31 17:04:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:04:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:04:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-01-31 17:04:46,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7304347826086957 [2024-01-31 17:04:46,426 INFO L175 Difference]: Start difference. First operand has 278 places, 517 transitions, 12715 flow. Second operand 5 states and 84 transitions. [2024-01-31 17:04:46,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 1170 transitions, 31278 flow [2024-01-31 17:04:49,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1170 transitions, 31024 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-01-31 17:04:49,979 INFO L231 Difference]: Finished difference. Result has 275 places, 513 transitions, 12427 flow [2024-01-31 17:04:49,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12606, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12427, PETRI_PLACES=275, PETRI_TRANSITIONS=513} [2024-01-31 17:04:49,980 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 250 predicate places. [2024-01-31 17:04:49,980 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 513 transitions, 12427 flow [2024-01-31 17:04:49,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 17:04:49,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:49,980 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:49,992 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 17:04:50,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:50,181 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 17:04:50,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:50,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1133948785, now seen corresponding path program 15 times [2024-01-31 17:04:50,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:50,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39494255] [2024-01-31 17:04:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:50,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:50,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:50,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39494255] [2024-01-31 17:04:50,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39494255] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:50,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72200183] [2024-01-31 17:04:50,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:04:50,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:50,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:50,265 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 17:04:50,270 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 17:04:50,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-01-31 17:04:50,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:50,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:04:50,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:50,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:50,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72200183] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:50,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:50,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-01-31 17:04:50,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458845809] [2024-01-31 17:04:50,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:50,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 17:04:50,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 17:04:50,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-01-31 17:04:50,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:04:50,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 513 transitions, 12427 flow. Second operand has 20 states, 20 states have (on average 6.35) internal successors, (127), 20 states have internal predecessors, (127), 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 17:04:50,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:50,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:04:50,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:54,763 INFO L124 PetriNetUnfolderBase]: 10617/17506 cut-off events. [2024-01-31 17:04:54,764 INFO L125 PetriNetUnfolderBase]: For 979338/979338 co-relation queries the response was YES. [2024-01-31 17:04:54,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176375 conditions, 17506 events. 10617/17506 cut-off events. For 979338/979338 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 122434 event pairs, 438 based on Foata normal form. 196/17702 useless extension candidates. Maximal degree in co-relation 174416. Up to 3452 conditions per place. [2024-01-31 17:04:54,967 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 479 selfloop transitions, 612 changer transitions 31/1123 dead transitions. [2024-01-31 17:04:54,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1123 transitions, 26859 flow [2024-01-31 17:04:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-31 17:04:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-31 17:04:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 431 transitions. [2024-01-31 17:04:54,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258893280632411 [2024-01-31 17:04:54,969 INFO L175 Difference]: Start difference. First operand has 275 places, 513 transitions, 12427 flow. Second operand 44 states and 431 transitions. [2024-01-31 17:04:54,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1123 transitions, 26859 flow [2024-01-31 17:05:01,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1123 transitions, 26477 flow, removed 191 selfloop flow, removed 0 redundant places. [2024-01-31 17:05:01,846 INFO L231 Difference]: Finished difference. Result has 338 places, 749 transitions, 21064 flow [2024-01-31 17:05:01,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12407, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=21064, PETRI_PLACES=338, PETRI_TRANSITIONS=749} [2024-01-31 17:05:01,847 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 313 predicate places. [2024-01-31 17:05:01,847 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 749 transitions, 21064 flow [2024-01-31 17:05:01,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.35) internal successors, (127), 20 states have internal predecessors, (127), 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 17:05:01,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:05:01,847 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:05:01,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-01-31 17:05:02,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:02,052 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 17:05:02,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:05:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1496431767, now seen corresponding path program 16 times [2024-01-31 17:05:02,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:05:02,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754008491] [2024-01-31 17:05:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:05:02,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:05:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:02,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:02,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754008491] [2024-01-31 17:05:02,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754008491] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:02,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741036900] [2024-01-31 17:05:02,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:05:02,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:02,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:02,129 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 17:05:02,130 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 17:05:02,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:05:02,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:05:02,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:05:02,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:02,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:05:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:02,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741036900] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:05:02,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:05:02,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-01-31 17:05:02,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567637612] [2024-01-31 17:05:02,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:05:02,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:05:02,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:05:02,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:05:02,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:05:02,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:05:02,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 749 transitions, 21064 flow. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:05:02,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:05:02,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:05:02,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:08,737 INFO L124 PetriNetUnfolderBase]: 12866/21199 cut-off events. [2024-01-31 17:05:08,737 INFO L125 PetriNetUnfolderBase]: For 1560286/1560286 co-relation queries the response was YES. [2024-01-31 17:05:08,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232897 conditions, 21199 events. 12866/21199 cut-off events. For 1560286/1560286 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 151402 event pairs, 622 based on Foata normal form. 74/21273 useless extension candidates. Maximal degree in co-relation 230550. Up to 6748 conditions per place. [2024-01-31 17:05:09,099 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 449 selfloop transitions, 886 changer transitions 89/1425 dead transitions. [2024-01-31 17:05:09,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1425 transitions, 40419 flow [2024-01-31 17:05:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:05:09,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:05:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 193 transitions. [2024-01-31 17:05:09,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416475972540046 [2024-01-31 17:05:09,102 INFO L175 Difference]: Start difference. First operand has 338 places, 749 transitions, 21064 flow. Second operand 19 states and 193 transitions. [2024-01-31 17:05:09,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1425 transitions, 40419 flow [2024-01-31 17:05:24,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1425 transitions, 38566 flow, removed 538 selfloop flow, removed 14 redundant places. [2024-01-31 17:05:24,202 INFO L231 Difference]: Finished difference. Result has 351 places, 1132 transitions, 34197 flow [2024-01-31 17:05:24,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=20224, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=34197, PETRI_PLACES=351, PETRI_TRANSITIONS=1132} [2024-01-31 17:05:24,203 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 326 predicate places. [2024-01-31 17:05:24,203 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1132 transitions, 34197 flow [2024-01-31 17:05:24,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 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 17:05:24,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:05:24,203 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:05:24,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-31 17:05:24,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:24,404 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 17:05:24,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:05:24,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1672523643, now seen corresponding path program 17 times [2024-01-31 17:05:24,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:05:24,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678954447] [2024-01-31 17:05:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:05:24,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:05:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:24,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:24,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678954447] [2024-01-31 17:05:24,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678954447] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:24,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927613467] [2024-01-31 17:05:24,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:05:24,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:24,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:24,468 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 17:05:24,472 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 17:05:24,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-01-31 17:05:24,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:05:24,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:05:24,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:24,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:05:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:24,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927613467] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:05:24,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:05:24,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-31 17:05:24,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54960032] [2024-01-31 17:05:24,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:05:24,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:05:24,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:05:24,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:05:24,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:05:24,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:05:24,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1132 transitions, 34197 flow. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 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 17:05:24,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:05:24,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:05:24,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:34,058 INFO L124 PetriNetUnfolderBase]: 15920/25987 cut-off events. [2024-01-31 17:05:34,058 INFO L125 PetriNetUnfolderBase]: For 2086866/2086866 co-relation queries the response was YES. [2024-01-31 17:05:34,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296457 conditions, 25987 events. 15920/25987 cut-off events. For 2086866/2086866 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 188196 event pairs, 1412 based on Foata normal form. 58/26045 useless extension candidates. Maximal degree in co-relation 294099. Up to 6316 conditions per place. [2024-01-31 17:05:34,542 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 748 selfloop transitions, 775 changer transitions 10/1534 dead transitions. [2024-01-31 17:05:34,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1534 transitions, 46447 flow [2024-01-31 17:05:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 17:05:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 17:05:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 219 transitions. [2024-01-31 17:05:34,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453416149068323 [2024-01-31 17:05:34,543 INFO L175 Difference]: Start difference. First operand has 351 places, 1132 transitions, 34197 flow. Second operand 21 states and 219 transitions. [2024-01-31 17:05:34,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1534 transitions, 46447 flow [2024-01-31 17:06:00,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1534 transitions, 46053 flow, removed 177 selfloop flow, removed 5 redundant places. [2024-01-31 17:06:00,900 INFO L231 Difference]: Finished difference. Result has 374 places, 1288 transitions, 40694 flow [2024-01-31 17:06:00,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=34007, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=625, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=40694, PETRI_PLACES=374, PETRI_TRANSITIONS=1288} [2024-01-31 17:06:00,902 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 349 predicate places. [2024-01-31 17:06:00,902 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1288 transitions, 40694 flow [2024-01-31 17:06:00,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 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 17:06:00,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:06:00,902 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:06:00,928 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 17:06:01,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:06:01,112 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 17:06:01,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:06:01,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1117436249, now seen corresponding path program 18 times [2024-01-31 17:06:01,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:06:01,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616790192] [2024-01-31 17:06:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:06:01,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:06:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:06:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:01,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:06:01,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616790192] [2024-01-31 17:06:01,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616790192] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:06:01,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211199930] [2024-01-31 17:06:01,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:06:01,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:06:01,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:06:01,172 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 17:06:01,173 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 17:06:01,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 17:06:01,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:06:01,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:06:01,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:06:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:01,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:06:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:01,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211199930] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:06:01,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:06:01,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-31 17:06:01,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746239777] [2024-01-31 17:06:01,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:06:01,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:06:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:06:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:06:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:06:01,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:06:01,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1288 transitions, 40694 flow. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:06:01,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:06:01,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:06:01,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:06:13,754 INFO L124 PetriNetUnfolderBase]: 18862/30855 cut-off events. [2024-01-31 17:06:13,754 INFO L125 PetriNetUnfolderBase]: For 2697896/2697896 co-relation queries the response was YES. [2024-01-31 17:06:14,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366911 conditions, 30855 events. 18862/30855 cut-off events. For 2697896/2697896 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 228588 event pairs, 1130 based on Foata normal form. 146/31001 useless extension candidates. Maximal degree in co-relation 364737. Up to 10636 conditions per place. [2024-01-31 17:06:14,700 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 628 selfloop transitions, 1274 changer transitions 9/1912 dead transitions. [2024-01-31 17:06:14,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1912 transitions, 61628 flow [2024-01-31 17:06:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 17:06:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 17:06:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 226 transitions. [2024-01-31 17:06:14,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44664031620553357 [2024-01-31 17:06:14,701 INFO L175 Difference]: Start difference. First operand has 374 places, 1288 transitions, 40694 flow. Second operand 22 states and 226 transitions. [2024-01-31 17:06:14,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1912 transitions, 61628 flow [2024-01-31 17:06:53,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1912 transitions, 60370 flow, removed 276 selfloop flow, removed 8 redundant places. [2024-01-31 17:06:53,239 INFO L231 Difference]: Finished difference. Result has 395 places, 1638 transitions, 57379 flow [2024-01-31 17:06:53,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=39772, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=924, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=57379, PETRI_PLACES=395, PETRI_TRANSITIONS=1638} [2024-01-31 17:06:53,241 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 370 predicate places. [2024-01-31 17:06:53,241 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1638 transitions, 57379 flow [2024-01-31 17:06:53,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:06:53,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:06:53,241 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:06:53,254 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 17:06:53,452 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,SelfDestructingSolverStorable24 [2024-01-31 17:06:53,452 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 17:06:53,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:06:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash 180975329, now seen corresponding path program 19 times [2024-01-31 17:06:53,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:06:53,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713466527] [2024-01-31 17:06:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:06:53,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:06:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:06:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:53,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:06:53,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713466527] [2024-01-31 17:06:53,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713466527] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:06:53,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084716308] [2024-01-31 17:06:53,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:06:53,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:06:53,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:06:53,513 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 17:06:53,513 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 17:06:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:06:53,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:06:53,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:06:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:53,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:06:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:06:53,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084716308] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:06:53,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:06:53,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-01-31 17:06:53,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644805697] [2024-01-31 17:06:53,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:06:53,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:06:53,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:06:53,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:06:53,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:06:53,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:06:53,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1638 transitions, 57379 flow. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 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 17:06:53,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:06:53,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:06:53,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:10,128 INFO L124 PetriNetUnfolderBase]: 20590/33709 cut-off events. [2024-01-31 17:07:10,128 INFO L125 PetriNetUnfolderBase]: For 3290960/3290960 co-relation queries the response was YES. [2024-01-31 17:07:10,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418287 conditions, 33709 events. 20590/33709 cut-off events. For 3290960/3290960 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 253443 event pairs, 862 based on Foata normal form. 166/33875 useless extension candidates. Maximal degree in co-relation 415707. Up to 5785 conditions per place. [2024-01-31 17:07:10,715 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 663 selfloop transitions, 1529 changer transitions 30/2223 dead transitions. [2024-01-31 17:07:10,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 2223 transitions, 76042 flow [2024-01-31 17:07:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 17:07:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 17:07:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 379 transitions. [2024-01-31 17:07:10,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43363844393592677 [2024-01-31 17:07:10,716 INFO L175 Difference]: Start difference. First operand has 395 places, 1638 transitions, 57379 flow. Second operand 38 states and 379 transitions. [2024-01-31 17:07:10,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 2223 transitions, 76042 flow