./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-nonblocking-cntr.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-nonblocking-cntr.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 17:15:10,004 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:15:10,058 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:15:10,068 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:15:10,069 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:15:10,097 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:15:10,097 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:15:10,097 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:15:10,098 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:15:10,101 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:15:10,101 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:15:10,101 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:15:10,102 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:15:10,103 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:15:10,103 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:15:10,103 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:15:10,104 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:15:10,104 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:15:10,104 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:15:10,104 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:15:10,104 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:15:10,105 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:15:10,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:15:10,105 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:15:10,105 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:15:10,105 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:15:10,105 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:15:10,106 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:15:10,106 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:15:10,106 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:15:10,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:15:10,107 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:15:10,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:15:10,107 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:15:10,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:15:10,108 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:15:10,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:15:10,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:15:10,108 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:15:10,108 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:15:10,109 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:15:10,109 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:15:10,109 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:15:10,109 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:15:10,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:15:10,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:15:10,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:15:10,371 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:15:10,371 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:15:10,372 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-nonblocking-cntr.wvr.yml/witness.yml [2024-01-31 17:15:10,467 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:15:10,468 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:15:10,469 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-01-31 17:15:11,441 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:15:11,609 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:15:11,609 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-01-31 17:15:11,614 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70956c70d/5094f1da2f304562a74c4bb9d6cea667/FLAG0c7a4c0d7 [2024-01-31 17:15:11,624 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70956c70d/5094f1da2f304562a74c4bb9d6cea667 [2024-01-31 17:15:11,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:15:11,625 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:15:11,626 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:15:11,626 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:15:11,630 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:15:11,630 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:15:10" (1/2) ... [2024-01-31 17:15:11,631 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c81ae6a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:15:11, skipping insertion in model container [2024-01-31 17:15:11,631 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:15:10" (1/2) ... [2024-01-31 17:15:11,632 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4303d1d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:15:11, skipping insertion in model container [2024-01-31 17:15:11,632 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:15:11" (2/2) ... [2024-01-31 17:15:11,633 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c81ae6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11, skipping insertion in model container [2024-01-31 17:15:11,633 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:15:11" (2/2) ... [2024-01-31 17:15:11,634 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:15:11,651 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:15:11,652 INFO L98 nessWitnessExtractor]: Location invariant after [L51-L51] (unsigned long )_argptr == 0UL [2024-01-31 17:15:11,667 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:15:11,808 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-01-31 17:15:11,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:15:11,817 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:15:11,827 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 17:15:11,830 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-01-31 17:15:11,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:15:11,840 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:15:11,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11 WrapperNode [2024-01-31 17:15:11,841 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:15:11,842 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:15:11,842 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:15:11,842 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:15:11,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,853 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,870 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2024-01-31 17:15:11,871 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:15:11,872 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:15:11,872 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:15:11,872 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:15:11,879 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,888 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,897 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-31 17:15:11,897 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,898 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,900 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,902 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,903 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,904 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,906 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:15:11,906 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:15:11,907 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:15:11,907 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:15:11,907 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (1/1) ... [2024-01-31 17:15:11,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:15:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:11,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 17:15:11,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 17:15:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:15:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:15:11,959 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:15:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:15:11,960 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:15:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:15:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:15:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:15:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:15:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:15:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:15:11,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:15:11,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:15:11,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:15:11,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:15:11,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:15:11,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:15:11,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:15:11,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:15:11,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:15:11,964 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 17:15:12,065 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:15:12,067 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:15:12,233 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:15:12,233 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:15:12,315 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:15:12,315 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 17:15:12,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:15:12 BoogieIcfgContainer [2024-01-31 17:15:12,316 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:15:12,317 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:15:12,317 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:15:12,319 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:15:12,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:15:10" (1/4) ... [2024-01-31 17:15:12,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b68c7f7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:15:12, skipping insertion in model container [2024-01-31 17:15:12,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:15:11" (2/4) ... [2024-01-31 17:15:12,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b68c7f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:15:12, skipping insertion in model container [2024-01-31 17:15:12,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:11" (3/4) ... [2024-01-31 17:15:12,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b68c7f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:15:12, skipping insertion in model container [2024-01-31 17:15:12,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:15:12" (4/4) ... [2024-01-31 17:15:12,321 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-01-31 17:15:12,333 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:15:12,333 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:15:12,333 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:15:12,371 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:15:12,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-01-31 17:15:12,413 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-01-31 17:15:12,413 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:15:12,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-01-31 17:15:12,415 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-01-31 17:15:12,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-01-31 17:15:12,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:15:12,429 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;@7caec460, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:15:12,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:15:12,439 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:15:12,440 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-01-31 17:15:12,440 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:15:12,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:12,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:12,441 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:12,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:12,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2145107019, now seen corresponding path program 1 times [2024-01-31 17:15:12,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:12,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918969802] [2024-01-31 17:15:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:12,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:12,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:12,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918969802] [2024-01-31 17:15:12,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918969802] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:15:12,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:15:12,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:15:12,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696568351] [2024-01-31 17:15:12,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:15:12,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:15:12,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:12,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:15:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:15:12,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-01-31 17:15:12,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:12,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:12,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-01-31 17:15:12,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:12,846 INFO L124 PetriNetUnfolderBase]: 65/133 cut-off events. [2024-01-31 17:15:12,847 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-31 17:15:12,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 133 events. 65/133 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 409 event pairs, 33 based on Foata normal form. 10/138 useless extension candidates. Maximal degree in co-relation 214. Up to 92 conditions per place. [2024-01-31 17:15:12,851 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-01-31 17:15:12,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 117 flow [2024-01-31 17:15:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:15:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:15:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-01-31 17:15:12,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-01-31 17:15:12,862 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 4 states and 45 transitions. [2024-01-31 17:15:12,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 117 flow [2024-01-31 17:15:12,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 27 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:15:12,867 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 56 flow [2024-01-31 17:15:12,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2024-01-31 17:15:12,870 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 0 predicate places. [2024-01-31 17:15:12,871 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 56 flow [2024-01-31 17:15:12,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:12,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:12,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:12,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:15:12,872 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:12,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1748902405, now seen corresponding path program 1 times [2024-01-31 17:15:12,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:12,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035211838] [2024-01-31 17:15:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:12,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:15:12,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:12,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035211838] [2024-01-31 17:15:13,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035211838] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:15:13,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:15:13,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:15:13,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575666499] [2024-01-31 17:15:13,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:15:13,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:15:13,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:13,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:15:13,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:15:13,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-01-31 17:15:13,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:13,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:13,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-01-31 17:15:13,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:13,081 INFO L124 PetriNetUnfolderBase]: 93/187 cut-off events. [2024-01-31 17:15:13,082 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-01-31 17:15:13,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 187 events. 93/187 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 614 event pairs, 39 based on Foata normal form. 10/196 useless extension candidates. Maximal degree in co-relation 106. Up to 116 conditions per place. [2024-01-31 17:15:13,084 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-01-31 17:15:13,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 137 flow [2024-01-31 17:15:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:15:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:15:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-01-31 17:15:13,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-01-31 17:15:13,086 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 56 flow. Second operand 4 states and 45 transitions. [2024-01-31 17:15:13,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 137 flow [2024-01-31 17:15:13,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 29 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 17:15:13,089 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 66 flow [2024-01-31 17:15:13,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=66, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2024-01-31 17:15:13,091 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2024-01-31 17:15:13,091 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 66 flow [2024-01-31 17:15:13,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:13,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:13,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:13,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:15:13,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:13,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:13,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1297323035, now seen corresponding path program 1 times [2024-01-31 17:15:13,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:13,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486458653] [2024-01-31 17:15:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:13,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:15:13,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:13,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486458653] [2024-01-31 17:15:13,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486458653] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:15:13,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:15:13,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:15:13,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416687959] [2024-01-31 17:15:13,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:15:13,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:15:13,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:13,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:15:13,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:15:13,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-01-31 17:15:13,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 17:15:13,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:13,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-01-31 17:15:13,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:13,439 INFO L124 PetriNetUnfolderBase]: 163/327 cut-off events. [2024-01-31 17:15:13,439 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2024-01-31 17:15:13,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 327 events. 163/327 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1246 event pairs, 23 based on Foata normal form. 1/323 useless extension candidates. Maximal degree in co-relation 235. Up to 103 conditions per place. [2024-01-31 17:15:13,444 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 37 selfloop transitions, 5 changer transitions 4/49 dead transitions. [2024-01-31 17:15:13,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 247 flow [2024-01-31 17:15:13,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:15:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:15:13,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-01-31 17:15:13,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-01-31 17:15:13,446 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 66 flow. Second operand 4 states and 62 transitions. [2024-01-31 17:15:13,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 247 flow [2024-01-31 17:15:13,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 49 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 17:15:13,450 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 100 flow [2024-01-31 17:15:13,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-01-31 17:15:13,451 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2024-01-31 17:15:13,451 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 100 flow [2024-01-31 17:15:13,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 17:15:13,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:13,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:13,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:15:13,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:13,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash 839591217, now seen corresponding path program 2 times [2024-01-31 17:15:13,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:13,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902259379] [2024-01-31 17:15:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:15:13,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:13,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902259379] [2024-01-31 17:15:13,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902259379] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:13,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482770811] [2024-01-31 17:15:13,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:15:13,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:13,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:13,562 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:13,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:15:13,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:15:13,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:13,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 17:15:13,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:15:13,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:15:13,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482770811] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:13,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:13,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-01-31 17:15:13,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552309141] [2024-01-31 17:15:13,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:13,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 17:15:13,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:13,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 17:15:13,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-01-31 17:15:13,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-01-31 17:15:13,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 100 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:13,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:13,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-01-31 17:15:13,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:13,993 INFO L124 PetriNetUnfolderBase]: 309/576 cut-off events. [2024-01-31 17:15:13,993 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2024-01-31 17:15:13,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 576 events. 309/576 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2431 event pairs, 49 based on Foata normal form. 20/595 useless extension candidates. Maximal degree in co-relation 507. Up to 266 conditions per place. [2024-01-31 17:15:13,996 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 43 selfloop transitions, 13 changer transitions 0/58 dead transitions. [2024-01-31 17:15:13,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 58 transitions, 347 flow [2024-01-31 17:15:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:15:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:15:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-01-31 17:15:13,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-01-31 17:15:13,998 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 100 flow. Second operand 6 states and 67 transitions. [2024-01-31 17:15:13,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 58 transitions, 347 flow [2024-01-31 17:15:13,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 58 transitions, 347 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:15:14,000 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 221 flow [2024-01-31 17:15:14,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-01-31 17:15:14,000 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 14 predicate places. [2024-01-31 17:15:14,001 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 221 flow [2024-01-31 17:15:14,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:14,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:14,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:14,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:14,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:14,218 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:14,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1068950307, now seen corresponding path program 3 times [2024-01-31 17:15:14,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:14,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966121001] [2024-01-31 17:15:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:14,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:14,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:14,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966121001] [2024-01-31 17:15:14,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966121001] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:14,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050640852] [2024-01-31 17:15:14,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:15:14,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:14,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:14,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:14,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:15:14,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:15:14,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:14,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 17:15:14,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:14,529 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 17:15:14,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:14,632 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 17:15:14,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050640852] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:14,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:14,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-31 17:15:14,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731227002] [2024-01-31 17:15:14,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:14,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:15:14,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:15:14,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:15:14,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:14,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 221 flow. Second operand has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:14,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:14,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:14,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:15,316 INFO L124 PetriNetUnfolderBase]: 687/1196 cut-off events. [2024-01-31 17:15:15,316 INFO L125 PetriNetUnfolderBase]: For 2149/2149 co-relation queries the response was YES. [2024-01-31 17:15:15,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1196 events. 687/1196 cut-off events. For 2149/2149 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5415 event pairs, 22 based on Foata normal form. 42/1238 useless extension candidates. Maximal degree in co-relation 2817. Up to 253 conditions per place. [2024-01-31 17:15:15,323 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 151 selfloop transitions, 81 changer transitions 24/257 dead transitions. [2024-01-31 17:15:15,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 257 transitions, 1757 flow [2024-01-31 17:15:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-31 17:15:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-31 17:15:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 343 transitions. [2024-01-31 17:15:15,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997668997668998 [2024-01-31 17:15:15,326 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 221 flow. Second operand 39 states and 343 transitions. [2024-01-31 17:15:15,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 257 transitions, 1757 flow [2024-01-31 17:15:15,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 257 transitions, 1749 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-01-31 17:15:15,334 INFO L231 Difference]: Finished difference. Result has 96 places, 100 transitions, 968 flow [2024-01-31 17:15:15,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=968, PETRI_PLACES=96, PETRI_TRANSITIONS=100} [2024-01-31 17:15:15,335 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 72 predicate places. [2024-01-31 17:15:15,335 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 100 transitions, 968 flow [2024-01-31 17:15:15,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:15,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:15,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:15,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:15,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:15,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:15,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:15,547 INFO L85 PathProgramCache]: Analyzing trace with hash 792340647, now seen corresponding path program 4 times [2024-01-31 17:15:15,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:15,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407692645] [2024-01-31 17:15:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:15,680 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 17:15:15,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:15,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407692645] [2024-01-31 17:15:15,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407692645] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:15,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988425768] [2024-01-31 17:15:15,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:15:15,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:15,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:15,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:15,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:15:15,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:15:15,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:15,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:15:15,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:15,804 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 17:15:15,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:15,861 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 17:15:15,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988425768] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:15,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:15,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-01-31 17:15:15,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110801125] [2024-01-31 17:15:15,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:15,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:15:15,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:15,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:15:15,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:15:15,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:15,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 100 transitions, 968 flow. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 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 17:15:15,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:15,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:15,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:16,473 INFO L124 PetriNetUnfolderBase]: 1078/1854 cut-off events. [2024-01-31 17:15:16,473 INFO L125 PetriNetUnfolderBase]: For 20716/20716 co-relation queries the response was YES. [2024-01-31 17:15:16,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10035 conditions, 1854 events. 1078/1854 cut-off events. For 20716/20716 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9222 event pairs, 29 based on Foata normal form. 96/1950 useless extension candidates. Maximal degree in co-relation 8905. Up to 355 conditions per place. [2024-01-31 17:15:16,490 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 152 selfloop transitions, 158 changer transitions 3/314 dead transitions. [2024-01-31 17:15:16,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 314 transitions, 3438 flow [2024-01-31 17:15:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:15:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:15:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 254 transitions. [2024-01-31 17:15:16,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-01-31 17:15:16,493 INFO L175 Difference]: Start difference. First operand has 96 places, 100 transitions, 968 flow. Second operand 28 states and 254 transitions. [2024-01-31 17:15:16,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 314 transitions, 3438 flow [2024-01-31 17:15:16,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 314 transitions, 3215 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-01-31 17:15:16,524 INFO L231 Difference]: Finished difference. Result has 136 places, 197 transitions, 2418 flow [2024-01-31 17:15:16,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2418, PETRI_PLACES=136, PETRI_TRANSITIONS=197} [2024-01-31 17:15:16,527 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 112 predicate places. [2024-01-31 17:15:16,527 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 197 transitions, 2418 flow [2024-01-31 17:15:16,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 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 17:15:16,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:16,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:16,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:16,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:16,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:16,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:16,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1346703031, now seen corresponding path program 5 times [2024-01-31 17:15:16,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:16,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080686604] [2024-01-31 17:15:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:16,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:16,817 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 17:15:16,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080686604] [2024-01-31 17:15:16,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080686604] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257457378] [2024-01-31 17:15:16,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:15:16,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:16,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:16,838 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:16,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:15:16,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 17:15:16,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:16,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 17:15:16,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:16,970 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 17:15:16,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:17,039 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 17:15:17,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257457378] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:17,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:17,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-31 17:15:17,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026965782] [2024-01-31 17:15:17,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:17,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:15:17,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:17,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:15:17,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:15:17,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:17,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 197 transitions, 2418 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:17,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:17,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:17,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:17,818 INFO L124 PetriNetUnfolderBase]: 1745/2963 cut-off events. [2024-01-31 17:15:17,819 INFO L125 PetriNetUnfolderBase]: For 55912/55912 co-relation queries the response was YES. [2024-01-31 17:15:17,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20507 conditions, 2963 events. 1745/2963 cut-off events. For 55912/55912 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16067 event pairs, 29 based on Foata normal form. 28/2991 useless extension candidates. Maximal degree in co-relation 16904. Up to 538 conditions per place. [2024-01-31 17:15:17,844 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 207 selfloop transitions, 252 changer transitions 0/460 dead transitions. [2024-01-31 17:15:17,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 460 transitions, 6435 flow [2024-01-31 17:15:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 17:15:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 17:15:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 261 transitions. [2024-01-31 17:15:17,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-01-31 17:15:17,846 INFO L175 Difference]: Start difference. First operand has 136 places, 197 transitions, 2418 flow. Second operand 29 states and 261 transitions. [2024-01-31 17:15:17,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 460 transitions, 6435 flow [2024-01-31 17:15:17,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 460 transitions, 6230 flow, removed 96 selfloop flow, removed 2 redundant places. [2024-01-31 17:15:17,980 INFO L231 Difference]: Finished difference. Result has 175 places, 321 transitions, 4989 flow [2024-01-31 17:15:17,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4989, PETRI_PLACES=175, PETRI_TRANSITIONS=321} [2024-01-31 17:15:17,981 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 151 predicate places. [2024-01-31 17:15:17,981 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 321 transitions, 4989 flow [2024-01-31 17:15:17,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:17,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:17,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:17,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-31 17:15:18,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:18,190 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:18,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:18,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1106256883, now seen corresponding path program 6 times [2024-01-31 17:15:18,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:18,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209089596] [2024-01-31 17:15:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:18,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:18,277 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 17:15:18,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:18,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209089596] [2024-01-31 17:15:18,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209089596] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:18,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28018882] [2024-01-31 17:15:18,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:15:18,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:18,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:18,279 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:18,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:15:18,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:15:18,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:18,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:15:18,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:18,403 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 17:15:18,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:18,495 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 17:15:18,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28018882] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:18,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:18,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-31 17:15:18,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448940368] [2024-01-31 17:15:18,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:18,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:15:18,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:18,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:15:18,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:15:18,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:18,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 321 transitions, 4989 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:18,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:18,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:18,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:19,807 INFO L124 PetriNetUnfolderBase]: 2291/3889 cut-off events. [2024-01-31 17:15:19,807 INFO L125 PetriNetUnfolderBase]: For 108495/108495 co-relation queries the response was YES. [2024-01-31 17:15:19,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30370 conditions, 3889 events. 2291/3889 cut-off events. For 108495/108495 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 21577 event pairs, 55 based on Foata normal form. 112/4001 useless extension candidates. Maximal degree in co-relation 26198. Up to 706 conditions per place. [2024-01-31 17:15:19,849 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 218 selfloop transitions, 442 changer transitions 4/665 dead transitions. [2024-01-31 17:15:19,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 665 transitions, 11119 flow [2024-01-31 17:15:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-31 17:15:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-31 17:15:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 408 transitions. [2024-01-31 17:15:19,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784786641929499 [2024-01-31 17:15:19,853 INFO L175 Difference]: Start difference. First operand has 175 places, 321 transitions, 4989 flow. Second operand 49 states and 408 transitions. [2024-01-31 17:15:19,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 665 transitions, 11119 flow [2024-01-31 17:15:20,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 665 transitions, 10214 flow, removed 421 selfloop flow, removed 9 redundant places. [2024-01-31 17:15:20,247 INFO L231 Difference]: Finished difference. Result has 245 places, 513 transitions, 9021 flow [2024-01-31 17:15:20,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4526, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=9021, PETRI_PLACES=245, PETRI_TRANSITIONS=513} [2024-01-31 17:15:20,248 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 221 predicate places. [2024-01-31 17:15:20,248 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 513 transitions, 9021 flow [2024-01-31 17:15:20,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:20,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:20,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:20,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 17:15:20,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:20,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:20,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:20,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1138138541, now seen corresponding path program 7 times [2024-01-31 17:15:20,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:20,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364832530] [2024-01-31 17:15:20,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:20,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:20,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:20,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364832530] [2024-01-31 17:15:20,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364832530] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:20,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35412866] [2024-01-31 17:15:20,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:15:20,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:20,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:20,589 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:20,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:15:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:20,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:15:20,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:20,759 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 17:15:20,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:15:20,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35412866] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:20,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:20,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-01-31 17:15:20,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268553524] [2024-01-31 17:15:20,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:20,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 17:15:20,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:20,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 17:15:20,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2024-01-31 17:15:20,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:20,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 513 transitions, 9021 flow. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:20,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:20,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:20,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:22,734 INFO L124 PetriNetUnfolderBase]: 3538/5980 cut-off events. [2024-01-31 17:15:22,734 INFO L125 PetriNetUnfolderBase]: For 185890/185890 co-relation queries the response was YES. [2024-01-31 17:15:22,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53950 conditions, 5980 events. 3538/5980 cut-off events. For 185890/185890 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 35882 event pairs, 53 based on Foata normal form. 106/6086 useless extension candidates. Maximal degree in co-relation 53400. Up to 1174 conditions per place. [2024-01-31 17:15:22,873 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 346 selfloop transitions, 715 changer transitions 7/1069 dead transitions. [2024-01-31 17:15:22,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 1069 transitions, 20688 flow [2024-01-31 17:15:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-01-31 17:15:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-01-31 17:15:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 383 transitions. [2024-01-31 17:15:22,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784584980237154 [2024-01-31 17:15:22,875 INFO L175 Difference]: Start difference. First operand has 245 places, 513 transitions, 9021 flow. Second operand 46 states and 383 transitions. [2024-01-31 17:15:22,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 1069 transitions, 20688 flow [2024-01-31 17:15:23,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1069 transitions, 19734 flow, removed 392 selfloop flow, removed 14 redundant places. [2024-01-31 17:15:23,903 INFO L231 Difference]: Finished difference. Result has 296 places, 865 transitions, 17348 flow [2024-01-31 17:15:23,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8468, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=17348, PETRI_PLACES=296, PETRI_TRANSITIONS=865} [2024-01-31 17:15:23,904 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 272 predicate places. [2024-01-31 17:15:23,904 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 865 transitions, 17348 flow [2024-01-31 17:15:23,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:23,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:23,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:23,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-31 17:15:24,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:24,105 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:24,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:24,106 INFO L85 PathProgramCache]: Analyzing trace with hash 498992649, now seen corresponding path program 8 times [2024-01-31 17:15:24,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:24,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236138482] [2024-01-31 17:15:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:24,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:24,197 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 17:15:24,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:24,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236138482] [2024-01-31 17:15:24,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236138482] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:24,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586773370] [2024-01-31 17:15:24,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:15:24,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:24,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:24,199 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:24,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:15:24,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:15:24,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:24,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:15:24,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:24,329 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 17:15:24,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:24,438 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 17:15:24,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586773370] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:24,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:24,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-01-31 17:15:24,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543513799] [2024-01-31 17:15:24,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:24,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 17:15:24,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:24,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 17:15:24,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-01-31 17:15:24,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:24,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 865 transitions, 17348 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:24,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:24,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:24,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:26,932 INFO L124 PetriNetUnfolderBase]: 4011/6735 cut-off events. [2024-01-31 17:15:26,933 INFO L125 PetriNetUnfolderBase]: For 278548/278548 co-relation queries the response was YES. [2024-01-31 17:15:26,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67841 conditions, 6735 events. 4011/6735 cut-off events. For 278548/278548 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 41112 event pairs, 166 based on Foata normal form. 16/6751 useless extension candidates. Maximal degree in co-relation 66148. Up to 1756 conditions per place. [2024-01-31 17:15:27,017 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 500 selfloop transitions, 623 changer transitions 6/1130 dead transitions. [2024-01-31 17:15:27,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1130 transitions, 24886 flow [2024-01-31 17:15:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 17:15:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 17:15:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 281 transitions. [2024-01-31 17:15:27,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36493506493506495 [2024-01-31 17:15:27,020 INFO L175 Difference]: Start difference. First operand has 296 places, 865 transitions, 17348 flow. Second operand 35 states and 281 transitions. [2024-01-31 17:15:27,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1130 transitions, 24886 flow [2024-01-31 17:15:28,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1130 transitions, 24234 flow, removed 298 selfloop flow, removed 11 redundant places. [2024-01-31 17:15:28,945 INFO L231 Difference]: Finished difference. Result has 333 places, 984 transitions, 21093 flow [2024-01-31 17:15:28,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=16924, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=21093, PETRI_PLACES=333, PETRI_TRANSITIONS=984} [2024-01-31 17:15:28,946 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 309 predicate places. [2024-01-31 17:15:28,947 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 984 transitions, 21093 flow [2024-01-31 17:15:28,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:28,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:28,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:28,959 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 17:15:29,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:29,148 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:29,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:29,148 INFO L85 PathProgramCache]: Analyzing trace with hash -70372241, now seen corresponding path program 9 times [2024-01-31 17:15:29,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:29,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848528302] [2024-01-31 17:15:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:29,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:29,258 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 17:15:29,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:29,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848528302] [2024-01-31 17:15:29,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848528302] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:29,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94533183] [2024-01-31 17:15:29,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:15:29,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:29,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:29,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:29,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 17:15:29,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 17:15:29,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:29,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:15:29,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:29,405 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 17:15:29,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:29,495 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 17:15:29,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94533183] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:29,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:29,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-01-31 17:15:29,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909049444] [2024-01-31 17:15:29,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:29,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 17:15:29,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 17:15:29,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2024-01-31 17:15:29,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:29,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 984 transitions, 21093 flow. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:29,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:29,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:29,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:32,881 INFO L124 PetriNetUnfolderBase]: 4480/7561 cut-off events. [2024-01-31 17:15:32,881 INFO L125 PetriNetUnfolderBase]: For 367164/367164 co-relation queries the response was YES. [2024-01-31 17:15:32,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80621 conditions, 7561 events. 4480/7561 cut-off events. For 367164/367164 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 47469 event pairs, 127 based on Foata normal form. 108/7669 useless extension candidates. Maximal degree in co-relation 79500. Up to 1434 conditions per place. [2024-01-31 17:15:32,972 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 312 selfloop transitions, 999 changer transitions 3/1315 dead transitions. [2024-01-31 17:15:32,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1315 transitions, 30411 flow [2024-01-31 17:15:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-01-31 17:15:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-01-31 17:15:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 382 transitions. [2024-01-31 17:15:32,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774703557312253 [2024-01-31 17:15:32,974 INFO L175 Difference]: Start difference. First operand has 333 places, 984 transitions, 21093 flow. Second operand 46 states and 382 transitions. [2024-01-31 17:15:32,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1315 transitions, 30411 flow [2024-01-31 17:15:35,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1315 transitions, 29978 flow, removed 175 selfloop flow, removed 11 redundant places. [2024-01-31 17:15:35,964 INFO L231 Difference]: Finished difference. Result has 383 places, 1173 transitions, 28846 flow [2024-01-31 17:15:35,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=20642, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=824, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=28846, PETRI_PLACES=383, PETRI_TRANSITIONS=1173} [2024-01-31 17:15:35,966 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 359 predicate places. [2024-01-31 17:15:35,966 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 1173 transitions, 28846 flow [2024-01-31 17:15:35,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:35,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:35,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:35,983 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 17:15:36,180 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,SelfDestructingSolverStorable10 [2024-01-31 17:15:36,181 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:36,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1005338915, now seen corresponding path program 10 times [2024-01-31 17:15:36,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:36,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027644577] [2024-01-31 17:15:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:36,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:36,273 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 17:15:36,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:36,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027644577] [2024-01-31 17:15:36,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027644577] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:36,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016909161] [2024-01-31 17:15:36,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:15:36,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:36,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:36,280 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:36,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 17:15:36,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:15:36,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:36,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:15:36,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:36,403 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 17:15:36,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:36,452 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 17:15:36,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016909161] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:36,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:36,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2024-01-31 17:15:36,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820436832] [2024-01-31 17:15:36,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:36,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:15:36,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:36,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:15:36,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:15:36,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:36,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1173 transitions, 28846 flow. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:36,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:36,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:36,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:40,066 INFO L124 PetriNetUnfolderBase]: 4479/7568 cut-off events. [2024-01-31 17:15:40,066 INFO L125 PetriNetUnfolderBase]: For 455213/455213 co-relation queries the response was YES. [2024-01-31 17:15:40,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88945 conditions, 7568 events. 4479/7568 cut-off events. For 455213/455213 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 47501 event pairs, 250 based on Foata normal form. 18/7586 useless extension candidates. Maximal degree in co-relation 86946. Up to 2008 conditions per place. [2024-01-31 17:15:40,160 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 645 selfloop transitions, 601 changer transitions 4/1251 dead transitions. [2024-01-31 17:15:40,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1251 transitions, 32930 flow [2024-01-31 17:15:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 17:15:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 17:15:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 168 transitions. [2024-01-31 17:15:40,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-01-31 17:15:40,161 INFO L175 Difference]: Start difference. First operand has 383 places, 1173 transitions, 28846 flow. Second operand 18 states and 168 transitions. [2024-01-31 17:15:40,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1251 transitions, 32930 flow [2024-01-31 17:15:44,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1251 transitions, 32163 flow, removed 291 selfloop flow, removed 19 redundant places. [2024-01-31 17:15:44,486 INFO L231 Difference]: Finished difference. Result has 382 places, 1178 transitions, 29974 flow [2024-01-31 17:15:44,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=27970, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=29974, PETRI_PLACES=382, PETRI_TRANSITIONS=1178} [2024-01-31 17:15:44,488 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 358 predicate places. [2024-01-31 17:15:44,489 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 1178 transitions, 29974 flow [2024-01-31 17:15:44,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:44,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:44,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:44,499 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 17:15:44,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:44,689 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:44,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:44,690 INFO L85 PathProgramCache]: Analyzing trace with hash -406220633, now seen corresponding path program 11 times [2024-01-31 17:15:44,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:44,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474978430] [2024-01-31 17:15:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:44,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:44,779 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 17:15:44,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:44,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474978430] [2024-01-31 17:15:44,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474978430] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:44,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792039181] [2024-01-31 17:15:44,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:15:44,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:44,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:44,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:44,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 17:15:44,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:15:44,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:44,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:15:44,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:44,933 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 17:15:44,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:45,012 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 17:15:45,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792039181] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:45,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:45,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-01-31 17:15:45,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359533215] [2024-01-31 17:15:45,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:45,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 17:15:45,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:45,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 17:15:45,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-01-31 17:15:45,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:45,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 1178 transitions, 29974 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:45,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:45,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:45,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:48,474 INFO L124 PetriNetUnfolderBase]: 4697/7888 cut-off events. [2024-01-31 17:15:48,474 INFO L125 PetriNetUnfolderBase]: For 445628/445628 co-relation queries the response was YES. [2024-01-31 17:15:48,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93628 conditions, 7888 events. 4697/7888 cut-off events. For 445628/445628 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49657 event pairs, 198 based on Foata normal form. 10/7898 useless extension candidates. Maximal degree in co-relation 92116. Up to 2045 conditions per place. [2024-01-31 17:15:48,606 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 695 selfloop transitions, 628 changer transitions 4/1328 dead transitions. [2024-01-31 17:15:48,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1328 transitions, 35979 flow [2024-01-31 17:15:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:15:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:15:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 166 transitions. [2024-01-31 17:15:48,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39712918660287083 [2024-01-31 17:15:48,624 INFO L175 Difference]: Start difference. First operand has 382 places, 1178 transitions, 29974 flow. Second operand 19 states and 166 transitions. [2024-01-31 17:15:48,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1328 transitions, 35979 flow [2024-01-31 17:15:52,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1328 transitions, 34646 flow, removed 76 selfloop flow, removed 18 redundant places. [2024-01-31 17:15:52,944 INFO L231 Difference]: Finished difference. Result has 386 places, 1220 transitions, 31622 flow [2024-01-31 17:15:52,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=28788, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=31622, PETRI_PLACES=386, PETRI_TRANSITIONS=1220} [2024-01-31 17:15:52,946 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 362 predicate places. [2024-01-31 17:15:52,946 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1220 transitions, 31622 flow [2024-01-31 17:15:52,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:52,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:52,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:52,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:53,160 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,SelfDestructingSolverStorable12 [2024-01-31 17:15:53,160 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:15:53,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:53,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1966088025, now seen corresponding path program 12 times [2024-01-31 17:15:53,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:53,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965465247] [2024-01-31 17:15:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:53,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:53,273 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 17:15:53,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:53,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965465247] [2024-01-31 17:15:53,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965465247] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:53,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604706443] [2024-01-31 17:15:53,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:15:53,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:53,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:53,275 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:53,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 17:15:53,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:15:53,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:53,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:15:53,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:53,421 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 17:15:53,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:53,498 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 17:15:53,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604706443] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:53,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:53,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-01-31 17:15:53,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53679237] [2024-01-31 17:15:53,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:53,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 17:15:53,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:53,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 17:15:53,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2024-01-31 17:15:53,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:15:53,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1220 transitions, 31622 flow. Second operand has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:15:53,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:53,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:15:53,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:57,605 INFO L124 PetriNetUnfolderBase]: 5163/8721 cut-off events. [2024-01-31 17:15:57,606 INFO L125 PetriNetUnfolderBase]: For 465984/465984 co-relation queries the response was YES. [2024-01-31 17:15:57,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103170 conditions, 8721 events. 5163/8721 cut-off events. For 465984/465984 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 56527 event pairs, 68 based on Foata normal form. 136/8857 useless extension candidates. Maximal degree in co-relation 101120. Up to 4073 conditions per place. [2024-01-31 17:15:57,894 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 768 selfloop transitions, 735 changer transitions 3/1507 dead transitions. [2024-01-31 17:15:57,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1507 transitions, 40972 flow [2024-01-31 17:15:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:15:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:15:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 242 transitions. [2024-01-31 17:15:57,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-01-31 17:15:57,895 INFO L175 Difference]: Start difference. First operand has 386 places, 1220 transitions, 31622 flow. Second operand 26 states and 242 transitions. [2024-01-31 17:15:57,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1507 transitions, 40972 flow [2024-01-31 17:16:02,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1507 transitions, 40513 flow, removed 58 selfloop flow, removed 11 redundant places. [2024-01-31 17:16:02,991 INFO L231 Difference]: Finished difference. Result has 411 places, 1322 transitions, 36957 flow [2024-01-31 17:16:02,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=31206, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=641, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=36957, PETRI_PLACES=411, PETRI_TRANSITIONS=1322} [2024-01-31 17:16:02,993 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 387 predicate places. [2024-01-31 17:16:02,993 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 1322 transitions, 36957 flow [2024-01-31 17:16:02,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:16:02,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:02,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:03,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-31 17:16:03,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 17:16:03,194 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 17:16:03,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1202308953, now seen corresponding path program 13 times [2024-01-31 17:16:03,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:03,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713972852] [2024-01-31 17:16:03,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:03,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:03,283 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 17:16:03,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:03,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713972852] [2024-01-31 17:16:03,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713972852] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:03,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25456059] [2024-01-31 17:16:03,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:16:03,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:03,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:03,285 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 17:16:03,286 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 17:16:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:03,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:16:03,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:03,425 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 17:16:03,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:03,501 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 17:16:03,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25456059] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:03,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:03,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-01-31 17:16:03,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023654218] [2024-01-31 17:16:03,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:03,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 17:16:03,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:03,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 17:16:03,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-01-31 17:16:03,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:16:03,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 1322 transitions, 36957 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:16:03,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:03,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:16:03,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:07,900 INFO L124 PetriNetUnfolderBase]: 5501/9239 cut-off events. [2024-01-31 17:16:07,900 INFO L125 PetriNetUnfolderBase]: For 627871/627871 co-relation queries the response was YES. [2024-01-31 17:16:07,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118323 conditions, 9239 events. 5501/9239 cut-off events. For 627871/627871 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 60344 event pairs, 278 based on Foata normal form. 28/9267 useless extension candidates. Maximal degree in co-relation 117140. Up to 7271 conditions per place. [2024-01-31 17:16:08,049 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 1279 selfloop transitions, 223 changer transitions 4/1507 dead transitions. [2024-01-31 17:16:08,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1507 transitions, 44690 flow [2024-01-31 17:16:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 17:16:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 17:16:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 175 transitions. [2024-01-31 17:16:08,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-01-31 17:16:08,050 INFO L175 Difference]: Start difference. First operand has 411 places, 1322 transitions, 36957 flow. Second operand 20 states and 175 transitions. [2024-01-31 17:16:08,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1507 transitions, 44690 flow [2024-01-31 17:16:14,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1507 transitions, 44060 flow, removed 287 selfloop flow, removed 6 redundant places. [2024-01-31 17:16:14,535 INFO L231 Difference]: Finished difference. Result has 432 places, 1387 transitions, 39002 flow [2024-01-31 17:16:14,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=36485, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=39002, PETRI_PLACES=432, PETRI_TRANSITIONS=1387} [2024-01-31 17:16:14,537 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 408 predicate places. [2024-01-31 17:16:14,537 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 1387 transitions, 39002 flow [2024-01-31 17:16:14,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:16:14,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:14,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:14,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-01-31 17:16:14,738 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,SelfDestructingSolverStorable14 [2024-01-31 17:16:14,739 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 17:16:14,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:14,739 INFO L85 PathProgramCache]: Analyzing trace with hash 189835593, now seen corresponding path program 14 times [2024-01-31 17:16:14,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:14,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789072068] [2024-01-31 17:16:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:14,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:14,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:14,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789072068] [2024-01-31 17:16:14,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789072068] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:14,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478611721] [2024-01-31 17:16:14,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:16:14,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:14,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:14,825 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 17:16:14,826 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 17:16:14,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:16:14,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:14,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:16:14,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:14,966 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 17:16:14,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:15,070 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 17:16:15,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478611721] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:15,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:15,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-01-31 17:16:15,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411451630] [2024-01-31 17:16:15,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:15,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:16:15,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:15,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:16:15,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:16:15,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:16:15,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 1387 transitions, 39002 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:16:15,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:15,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:16:15,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:19,674 INFO L124 PetriNetUnfolderBase]: 5610/9389 cut-off events. [2024-01-31 17:16:19,674 INFO L125 PetriNetUnfolderBase]: For 671593/671593 co-relation queries the response was YES. [2024-01-31 17:16:19,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122077 conditions, 9389 events. 5610/9389 cut-off events. For 671593/671593 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 60815 event pairs, 312 based on Foata normal form. 8/9397 useless extension candidates. Maximal degree in co-relation 121874. Up to 7987 conditions per place. [2024-01-31 17:16:19,803 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 1321 selfloop transitions, 170 changer transitions 2/1494 dead transitions. [2024-01-31 17:16:19,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1494 transitions, 44910 flow [2024-01-31 17:16:19,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:16:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:16:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 133 transitions. [2024-01-31 17:16:19,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403030303030303 [2024-01-31 17:16:19,805 INFO L175 Difference]: Start difference. First operand has 432 places, 1387 transitions, 39002 flow. Second operand 15 states and 133 transitions. [2024-01-31 17:16:19,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1494 transitions, 44910 flow [2024-01-31 17:16:26,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1494 transitions, 44511 flow, removed 146 selfloop flow, removed 8 redundant places. [2024-01-31 17:16:26,440 INFO L231 Difference]: Finished difference. Result has 442 places, 1425 transitions, 40362 flow [2024-01-31 17:16:26,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=38554, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=40362, PETRI_PLACES=442, PETRI_TRANSITIONS=1425} [2024-01-31 17:16:26,441 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 418 predicate places. [2024-01-31 17:16:26,442 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1425 transitions, 40362 flow [2024-01-31 17:16:26,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:16:26,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:26,442 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:26,455 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 17:16:26,653 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,SelfDestructingSolverStorable15 [2024-01-31 17:16:26,653 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:16:26,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash 907756757, now seen corresponding path program 15 times [2024-01-31 17:16:26,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:26,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232397448] [2024-01-31 17:16:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:26,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:26,757 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 17:16:26,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:26,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232397448] [2024-01-31 17:16:26,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232397448] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:26,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866078539] [2024-01-31 17:16:26,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:16:26,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:26,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:26,774 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 17:16:26,778 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 17:16:26,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 17:16:26,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:26,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:16:26,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:26,916 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 17:16:26,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:26,999 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 17:16:26,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866078539] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:26,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:26,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-01-31 17:16:27,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423569413] [2024-01-31 17:16:27,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:27,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:16:27,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:27,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:16:27,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:16:27,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:16:27,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1425 transitions, 40362 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:16:27,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:27,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:16:27,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:32,464 INFO L124 PetriNetUnfolderBase]: 5944/9966 cut-off events. [2024-01-31 17:16:32,464 INFO L125 PetriNetUnfolderBase]: For 742260/742260 co-relation queries the response was YES. [2024-01-31 17:16:32,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132033 conditions, 9966 events. 5944/9966 cut-off events. For 742260/742260 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 65213 event pairs, 82 based on Foata normal form. 80/10046 useless extension candidates. Maximal degree in co-relation 131062. Up to 4279 conditions per place. [2024-01-31 17:16:32,610 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 780 selfloop transitions, 881 changer transitions 1/1663 dead transitions. [2024-01-31 17:16:32,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1663 transitions, 49381 flow [2024-01-31 17:16:32,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 17:16:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 17:16:32,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 219 transitions. [2024-01-31 17:16:32,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981818181818182 [2024-01-31 17:16:32,611 INFO L175 Difference]: Start difference. First operand has 442 places, 1425 transitions, 40362 flow. Second operand 25 states and 219 transitions. [2024-01-31 17:16:32,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1663 transitions, 49381 flow [2024-01-31 17:16:40,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 1663 transitions, 49056 flow, removed 107 selfloop flow, removed 10 redundant places. [2024-01-31 17:16:40,126 INFO L231 Difference]: Finished difference. Result has 462 places, 1499 transitions, 45759 flow [2024-01-31 17:16:40,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=39973, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=45759, PETRI_PLACES=462, PETRI_TRANSITIONS=1499} [2024-01-31 17:16:40,128 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 438 predicate places. [2024-01-31 17:16:40,128 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 1499 transitions, 45759 flow [2024-01-31 17:16:40,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:16:40,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:40,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:40,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-01-31 17:16:40,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:40,340 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:16:40,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2125386687, now seen corresponding path program 16 times [2024-01-31 17:16:40,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:40,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555137113] [2024-01-31 17:16:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:40,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:16:40,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:40,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555137113] [2024-01-31 17:16:40,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555137113] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:40,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209025636] [2024-01-31 17:16:40,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:16:40,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:40,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:40,422 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:16:40,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 17:16:40,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:16:40,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:40,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:16:40,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:16:40,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:16:40,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209025636] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:40,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:40,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 11 [2024-01-31 17:16:40,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327945107] [2024-01-31 17:16:40,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:40,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:16:40,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:40,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:16:40,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:16:40,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-01-31 17:16:40,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1499 transitions, 45759 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:16:40,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:40,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-01-31 17:16:40,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:49,798 INFO L124 PetriNetUnfolderBase]: 11151/19278 cut-off events. [2024-01-31 17:16:49,798 INFO L125 PetriNetUnfolderBase]: For 1661116/1661610 co-relation queries the response was YES. [2024-01-31 17:16:50,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276397 conditions, 19278 events. 11151/19278 cut-off events. For 1661116/1661610 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 147624 event pairs, 329 based on Foata normal form. 46/19183 useless extension candidates. Maximal degree in co-relation 274280. Up to 5338 conditions per place. [2024-01-31 17:16:50,145 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 1461 selfloop transitions, 1633 changer transitions 373/3535 dead transitions. [2024-01-31 17:16:50,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 3535 transitions, 116594 flow [2024-01-31 17:16:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:16:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:16:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-01-31 17:16:50,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6414141414141414 [2024-01-31 17:16:50,147 INFO L175 Difference]: Start difference. First operand has 462 places, 1499 transitions, 45759 flow. Second operand 9 states and 127 transitions. [2024-01-31 17:16:50,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 3535 transitions, 116594 flow [2024-01-31 17:17:18,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 3535 transitions, 115809 flow, removed 237 selfloop flow, removed 16 redundant places. [2024-01-31 17:17:18,564 INFO L231 Difference]: Finished difference. Result has 459 places, 2552 transitions, 87666 flow [2024-01-31 17:17:18,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=45386, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=767, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=87666, PETRI_PLACES=459, PETRI_TRANSITIONS=2552} [2024-01-31 17:17:18,566 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 435 predicate places. [2024-01-31 17:17:18,566 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 2552 transitions, 87666 flow [2024-01-31 17:17:18,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:17:18,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:18,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:18,579 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 17:17:18,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 17:17:18,777 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 17:17:18,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:18,778 INFO L85 PathProgramCache]: Analyzing trace with hash -578495319, now seen corresponding path program 17 times [2024-01-31 17:17:18,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:18,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225771605] [2024-01-31 17:17:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:18,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:18,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:18,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225771605] [2024-01-31 17:17:18,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225771605] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:18,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088809061] [2024-01-31 17:17:18,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:17:18,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:18,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:18,872 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 17:17:18,874 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 17:17:18,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-01-31 17:17:18,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:17:18,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:17:18,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:18,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:17:19,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088809061] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:19,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:19,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2024-01-31 17:17:19,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044484397] [2024-01-31 17:17:19,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:19,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:17:19,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:19,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:17:19,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:17:19,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-31 17:17:19,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 2552 transitions, 87666 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:17:19,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:19,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-31 17:17:19,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand