./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.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-nonblocking-cntr.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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.2024-02-07_10-47-16.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-dev-958ec4d-m [2024-02-07 14:41:22,597 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:41:22,660 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:41:22,664 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:41:22,664 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:41:22,686 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:41:22,687 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:41:22,687 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:41:22,688 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:41:22,691 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:41:22,691 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:41:22,691 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:41:22,692 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:41:22,693 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:41:22,693 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:41:22,693 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:41:22,693 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:41:22,694 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:41:22,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:41:22,694 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:41:22,694 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:41:22,695 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:41:22,695 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:41:22,695 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:41:22,695 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:41:22,695 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:41:22,696 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:41:22,696 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:41:22,696 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:41:22,697 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:41:22,697 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:41:22,697 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:41:22,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:41:22,698 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:41:22,698 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:41:22,698 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:41:22,698 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:41:22,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:41:22,699 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:41:22,699 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:41:22,699 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:41:22,699 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:41:22,699 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:41:22,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:41:22,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:41:22,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:41:22,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:41:22,955 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:41:22,956 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:41:22,957 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-nonblocking-cntr.wvr.yml/witness.yml [2024-02-07 14:41:23,056 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:41:23,056 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:41:23,056 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-02-07 14:41:24,092 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:41:24,262 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:41:24,262 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-02-07 14:41:24,268 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4fff0114/b654bd379e0f4c2583a5a6dbf86c074c/FLAGfc31bfcdc [2024-02-07 14:41:24,280 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4fff0114/b654bd379e0f4c2583a5a6dbf86c074c [2024-02-07 14:41:24,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:41:24,282 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:41:24,283 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:41:24,283 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:41:24,287 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:41:24,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:41:23" (1/2) ... [2024-02-07 14:41:24,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@680d44c6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:41:24, skipping insertion in model container [2024-02-07 14:41:24,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:41:23" (1/2) ... [2024-02-07 14:41:24,290 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c54acd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:41:24, skipping insertion in model container [2024-02-07 14:41:24,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:41:24" (2/2) ... [2024-02-07 14:41:24,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@680d44c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24, skipping insertion in model container [2024-02-07 14:41:24,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:41:24" (2/2) ... [2024-02-07 14:41:24,291 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:41:24,303 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:41:24,304 INFO L76 edCorrectnessWitness]: Location invariant before [L67-L67] ((((0LL - (long long )M) + (long long )counter >= 0LL) && ((long long )M + (long long )counter >= 0LL)) && ((0LL - (long long )M) - (long long )counter >= 0LL)) && ((long long )M - (long long )counter >= 0LL) [2024-02-07 14:41:24,304 INFO L76 edCorrectnessWitness]: Location invariant before [L55-L55] (1 <= counter) && (counter != 0) [2024-02-07 14:41:24,304 INFO L76 edCorrectnessWitness]: Location invariant before [L54-L54] (0 <= counter) && (((0 <= i && ((((((((((i <= 8 || i <= 7) || i <= 6) || i <= 5) || i <= 4) || (i <= 3 && i <= 65535)) || i <= 2147483646) || (i <= 2 && i <= 255)) || i <= 11) || (i <= 1 && (i == 0 || i == 1))) || i <= 10)) || (0 == i && i == 0)) || (0 <= i && i <= 9)) [2024-02-07 14:41:24,305 INFO L76 edCorrectnessWitness]: Location invariant before [L76-L76] 0 <= counter [2024-02-07 14:41:24,305 INFO L76 edCorrectnessWitness]: Location invariant before [L58-L58] 0 <= i [2024-02-07 14:41:24,305 INFO L76 edCorrectnessWitness]: Location invariant before [L56-L56] (((0 <= counter) && (counter <= 2147483646)) && (counter != -1)) && ((((0 <= i && (((((((((i <= 7 || i <= 6) || i <= 5) || i <= 4) || (i <= 3 && i <= 65535)) || i <= 2147483646) || (i <= 2 && i <= 255)) || i <= 11) || (i <= 1 && (i == 0 || i == 1))) || i <= 10)) || (0 == i && i == 0)) || (0 <= i && i <= 9)) || (0 <= i && i <= 8)) [2024-02-07 14:41:24,305 INFO L76 edCorrectnessWitness]: Location invariant before [L43-L43] 0 <= counter [2024-02-07 14:41:24,305 INFO L76 edCorrectnessWitness]: Location invariant before [L44-L44] 1 <= counter [2024-02-07 14:41:24,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:41:24,431 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] [2024-02-07 14:41:24,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:41:24,457 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:41:24,512 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] [2024-02-07 14:41:24,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:41:24,524 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:41:24,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24 WrapperNode [2024-02-07 14:41:24,525 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:41:24,526 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:41:24,526 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:41:24,526 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:41:24,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (1/1) ... [2024-02-07 14:41:24,537 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (1/1) ... [2024-02-07 14:41:24,549 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2024-02-07 14:41:24,550 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:41:24,550 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:41:24,550 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:41:24,550 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:41:24,559 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (1/1) ... [2024-02-07 14:41:24,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (1/1) ... [2024-02-07 14:41:24,561 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (1/1) ... [2024-02-07 14:41:24,570 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]. [2024-02-07 14:41:24,570 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (1/1) ... [2024-02-07 14:41:24,570 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (1/1) ... [2024-02-07 14:41:24,574 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (1/1) ... [2024-02-07 14:41:24,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (1/1) ... [2024-02-07 14:41:24,577 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (1/1) ... [2024-02-07 14:41:24,578 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (1/1) ... [2024-02-07 14:41:24,579 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:41:24,580 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:41:24,580 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:41:24,580 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:41:24,581 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (1/1) ... [2024-02-07 14:41:24,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:41:24,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:24,642 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) [2024-02-07 14:41:24,702 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 [2024-02-07 14:41:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:41:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:41:24,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:41:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:41:24,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:41:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:41:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:41:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:41:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:41:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:41:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:41:24,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:41:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:41:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:41:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:41:24,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:41:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:41:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:41:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:41:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:41:24,728 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:41:24,815 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:41:24,816 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:41:25,036 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:41:25,036 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:41:25,141 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:41:25,141 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 14:41:25,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:41:25 BoogieIcfgContainer [2024-02-07 14:41:25,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:41:25,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:41:25,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:41:25,146 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:41:25,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:41:23" (1/4) ... [2024-02-07 14:41:25,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42c7a4e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:41:25, skipping insertion in model container [2024-02-07 14:41:25,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:41:24" (2/4) ... [2024-02-07 14:41:25,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42c7a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:41:25, skipping insertion in model container [2024-02-07 14:41:25,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:41:24" (3/4) ... [2024-02-07 14:41:25,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42c7a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:41:25, skipping insertion in model container [2024-02-07 14:41:25,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:41:25" (4/4) ... [2024-02-07 14:41:25,148 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-02-07 14:41:25,161 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:41:25,161 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-02-07 14:41:25,161 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:41:25,196 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:41:25,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 32 transitions, 78 flow [2024-02-07 14:41:25,236 INFO L124 PetriNetUnfolderBase]: 2/30 cut-off events. [2024-02-07 14:41:25,236 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:41:25,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 30 events. 2/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 44 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-02-07 14:41:25,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 32 transitions, 78 flow [2024-02-07 14:41:25,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 29 transitions, 70 flow [2024-02-07 14:41:25,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:41:25,256 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;@55877b9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:41:25,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-02-07 14:41:25,262 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:41:25,262 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:41:25,262 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:41:25,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:25,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:41:25,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:25,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:25,266 INFO L85 PathProgramCache]: Analyzing trace with hash 8908, now seen corresponding path program 1 times [2024-02-07 14:41:25,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:25,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794980417] [2024-02-07 14:41:25,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:25,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:25,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:25,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794980417] [2024-02-07 14:41:25,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794980417] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:41:25,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:41:25,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:41:25,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111674485] [2024-02-07 14:41:25,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:41:25,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:41:25,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:25,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:41:25,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:41:25,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-02-07 14:41:25,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:25,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:25,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-02-07 14:41:25,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:25,683 INFO L124 PetriNetUnfolderBase]: 96/185 cut-off events. [2024-02-07 14:41:25,683 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-02-07 14:41:25,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 185 events. 96/185 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 646 event pairs, 72 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 312. Up to 171 conditions per place. [2024-02-07 14:41:25,687 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 19 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2024-02-07 14:41:25,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 104 flow [2024-02-07 14:41:25,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:41:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:41:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-02-07 14:41:25,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2024-02-07 14:41:25,698 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 70 flow. Second operand 3 states and 43 transitions. [2024-02-07 14:41:25,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 104 flow [2024-02-07 14:41:25,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 96 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:41:25,702 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 58 flow [2024-02-07 14:41:25,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2024-02-07 14:41:25,709 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -6 predicate places. [2024-02-07 14:41:25,710 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 58 flow [2024-02-07 14:41:25,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:25,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:25,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 14:41:25,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:41:25,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:25,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:25,712 INFO L85 PathProgramCache]: Analyzing trace with hash -353959393, now seen corresponding path program 1 times [2024-02-07 14:41:25,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:25,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978645528] [2024-02-07 14:41:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:25,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:25,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:25,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978645528] [2024-02-07 14:41:25,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978645528] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:41:25,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:41:25,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:41:25,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483565222] [2024-02-07 14:41:25,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:41:25,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:41:25,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:41:25,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:41:25,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-02-07 14:41:25,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:25,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:25,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-02-07 14:41:25,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:25,873 INFO L124 PetriNetUnfolderBase]: 129/252 cut-off events. [2024-02-07 14:41:25,873 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 14:41:25,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 252 events. 129/252 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 920 event pairs, 41 based on Foata normal form. 1/211 useless extension candidates. Maximal degree in co-relation 487. Up to 150 conditions per place. [2024-02-07 14:41:25,875 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 30 selfloop transitions, 2 changer transitions 1/37 dead transitions. [2024-02-07 14:41:25,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 37 transitions, 151 flow [2024-02-07 14:41:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:41:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:41:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-02-07 14:41:25,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-02-07 14:41:25,878 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 58 flow. Second operand 3 states and 58 transitions. [2024-02-07 14:41:25,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 37 transitions, 151 flow [2024-02-07 14:41:25,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 37 transitions, 147 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:41:25,880 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 72 flow [2024-02-07 14:41:25,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-02-07 14:41:25,880 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2024-02-07 14:41:25,880 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 72 flow [2024-02-07 14:41:25,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:25,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:25,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:25,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:41:25,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:25,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:25,881 INFO L85 PathProgramCache]: Analyzing trace with hash -867741437, now seen corresponding path program 1 times [2024-02-07 14:41:25,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:25,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384743125] [2024-02-07 14:41:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:25,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:26,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:26,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384743125] [2024-02-07 14:41:26,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384743125] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:41:26,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:41:26,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:41:26,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505310183] [2024-02-07 14:41:26,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:41:26,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:41:26,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:26,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:41:26,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:41:26,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-02-07 14:41:26,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:26,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:26,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-02-07 14:41:26,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:26,135 INFO L124 PetriNetUnfolderBase]: 118/233 cut-off events. [2024-02-07 14:41:26,136 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-02-07 14:41:26,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 233 events. 118/233 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 815 event pairs, 22 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 143. Up to 148 conditions per place. [2024-02-07 14:41:26,137 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 27 selfloop transitions, 4 changer transitions 7/42 dead transitions. [2024-02-07 14:41:26,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 187 flow [2024-02-07 14:41:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:41:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:41:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-02-07 14:41:26,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-02-07 14:41:26,140 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 72 flow. Second operand 4 states and 67 transitions. [2024-02-07 14:41:26,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 187 flow [2024-02-07 14:41:26,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:41:26,142 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 93 flow [2024-02-07 14:41:26,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-02-07 14:41:26,145 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2024-02-07 14:41:26,146 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 93 flow [2024-02-07 14:41:26,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:26,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:26,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:26,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:41:26,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:26,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:26,147 INFO L85 PathProgramCache]: Analyzing trace with hash -659246586, now seen corresponding path program 1 times [2024-02-07 14:41:26,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:26,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957858790] [2024-02-07 14:41:26,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:26,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:26,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:26,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957858790] [2024-02-07 14:41:26,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957858790] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:41:26,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:41:26,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:41:26,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822565696] [2024-02-07 14:41:26,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:41:26,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:41:26,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:41:26,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:41:26,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-02-07 14:41:26,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:26,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:26,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-02-07 14:41:26,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:26,307 INFO L124 PetriNetUnfolderBase]: 153/292 cut-off events. [2024-02-07 14:41:26,307 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-02-07 14:41:26,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 292 events. 153/292 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1080 event pairs, 60 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 236. Up to 142 conditions per place. [2024-02-07 14:41:26,311 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 32 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2024-02-07 14:41:26,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 208 flow [2024-02-07 14:41:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:41:26,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:41:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-02-07 14:41:26,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2024-02-07 14:41:26,314 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 93 flow. Second operand 3 states and 59 transitions. [2024-02-07 14:41:26,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 208 flow [2024-02-07 14:41:26,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:41:26,317 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 137 flow [2024-02-07 14:41:26,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-02-07 14:41:26,318 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2024-02-07 14:41:26,319 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 137 flow [2024-02-07 14:41:26,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:26,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:26,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:26,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:41:26,319 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:26,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:26,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2041999782, now seen corresponding path program 1 times [2024-02-07 14:41:26,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:26,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431853793] [2024-02-07 14:41:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:26,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:26,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:26,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431853793] [2024-02-07 14:41:26,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431853793] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:41:26,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:41:26,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:41:26,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196417801] [2024-02-07 14:41:26,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:41:26,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:41:26,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:26,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:41:26,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:41:26,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-02-07 14:41:26,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:26,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:26,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-02-07 14:41:26,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:26,457 INFO L124 PetriNetUnfolderBase]: 253/500 cut-off events. [2024-02-07 14:41:26,458 INFO L125 PetriNetUnfolderBase]: For 471/471 co-relation queries the response was YES. [2024-02-07 14:41:26,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 500 events. 253/500 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2356 event pairs, 96 based on Foata normal form. 8/507 useless extension candidates. Maximal degree in co-relation 405. Up to 277 conditions per place. [2024-02-07 14:41:26,460 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 45 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2024-02-07 14:41:26,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 58 transitions, 344 flow [2024-02-07 14:41:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:41:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:41:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-02-07 14:41:26,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-02-07 14:41:26,464 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 137 flow. Second operand 4 states and 74 transitions. [2024-02-07 14:41:26,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 58 transitions, 344 flow [2024-02-07 14:41:26,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 58 transitions, 308 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-02-07 14:41:26,466 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 195 flow [2024-02-07 14:41:26,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2024-02-07 14:41:26,467 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2024-02-07 14:41:26,467 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 195 flow [2024-02-07 14:41:26,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:26,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:26,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:26,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:41:26,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:26,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1553760944, now seen corresponding path program 1 times [2024-02-07 14:41:26,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:26,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719455672] [2024-02-07 14:41:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:26,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:26,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:26,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719455672] [2024-02-07 14:41:26,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719455672] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:41:26,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:41:26,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:41:26,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876954401] [2024-02-07 14:41:26,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:41:26,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:41:26,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:41:26,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:41:26,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-02-07 14:41:26,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:26,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:26,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-02-07 14:41:26,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:26,679 INFO L124 PetriNetUnfolderBase]: 380/753 cut-off events. [2024-02-07 14:41:26,680 INFO L125 PetriNetUnfolderBase]: For 1002/1002 co-relation queries the response was YES. [2024-02-07 14:41:26,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2065 conditions, 753 events. 380/753 cut-off events. For 1002/1002 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3790 event pairs, 117 based on Foata normal form. 39/780 useless extension candidates. Maximal degree in co-relation 975. Up to 351 conditions per place. [2024-02-07 14:41:26,683 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 60 selfloop transitions, 11 changer transitions 1/76 dead transitions. [2024-02-07 14:41:26,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 76 transitions, 476 flow [2024-02-07 14:41:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:41:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:41:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-02-07 14:41:26,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-02-07 14:41:26,685 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 195 flow. Second operand 5 states and 100 transitions. [2024-02-07 14:41:26,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 76 transitions, 476 flow [2024-02-07 14:41:26,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 76 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:41:26,690 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 311 flow [2024-02-07 14:41:26,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2024-02-07 14:41:26,692 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2024-02-07 14:41:26,692 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 311 flow [2024-02-07 14:41:26,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:26,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:26,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:26,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:41:26,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:26,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:26,693 INFO L85 PathProgramCache]: Analyzing trace with hash -796183229, now seen corresponding path program 1 times [2024-02-07 14:41:26,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:26,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528984742] [2024-02-07 14:41:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:26,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:26,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:26,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528984742] [2024-02-07 14:41:26,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528984742] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:26,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243168278] [2024-02-07 14:41:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:26,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:26,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:26,769 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) [2024-02-07 14:41:26,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:41:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:26,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:41:26,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:26,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:26,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243168278] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:26,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:26,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-02-07 14:41:26,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636022006] [2024-02-07 14:41:26,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:26,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:41:26,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:26,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:41:26,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:41:26,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-02-07 14:41:26,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 311 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:26,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:26,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-02-07 14:41:26,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:27,463 INFO L124 PetriNetUnfolderBase]: 1073/2195 cut-off events. [2024-02-07 14:41:27,463 INFO L125 PetriNetUnfolderBase]: For 5697/5697 co-relation queries the response was YES. [2024-02-07 14:41:27,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6414 conditions, 2195 events. 1073/2195 cut-off events. For 5697/5697 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13188 event pairs, 136 based on Foata normal form. 279/2465 useless extension candidates. Maximal degree in co-relation 3717. Up to 361 conditions per place. [2024-02-07 14:41:27,473 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 157 selfloop transitions, 62 changer transitions 1/224 dead transitions. [2024-02-07 14:41:27,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 224 transitions, 1547 flow [2024-02-07 14:41:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 14:41:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 14:41:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 327 transitions. [2024-02-07 14:41:27,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638671875 [2024-02-07 14:41:27,475 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 311 flow. Second operand 16 states and 327 transitions. [2024-02-07 14:41:27,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 224 transitions, 1547 flow [2024-02-07 14:41:27,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 224 transitions, 1524 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-02-07 14:41:27,482 INFO L231 Difference]: Finished difference. Result has 71 places, 91 transitions, 961 flow [2024-02-07 14:41:27,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=961, PETRI_PLACES=71, PETRI_TRANSITIONS=91} [2024-02-07 14:41:27,483 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 37 predicate places. [2024-02-07 14:41:27,483 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 91 transitions, 961 flow [2024-02-07 14:41:27,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:27,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:27,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:27,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-07 14:41:27,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:27,695 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:27,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:27,696 INFO L85 PathProgramCache]: Analyzing trace with hash -634872108, now seen corresponding path program 1 times [2024-02-07 14:41:27,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:27,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333443258] [2024-02-07 14:41:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:27,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:27,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:27,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333443258] [2024-02-07 14:41:27,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333443258] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:27,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84629923] [2024-02-07 14:41:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:27,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:27,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:27,817 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) [2024-02-07 14:41:27,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 14:41:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:27,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:41:27,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:27,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:28,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84629923] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:28,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:28,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2024-02-07 14:41:28,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131056259] [2024-02-07 14:41:28,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:28,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 14:41:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:28,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 14:41:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:41:28,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-02-07 14:41:28,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 91 transitions, 961 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:28,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:28,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-02-07 14:41:28,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:28,895 INFO L124 PetriNetUnfolderBase]: 1969/3831 cut-off events. [2024-02-07 14:41:28,896 INFO L125 PetriNetUnfolderBase]: For 18930/18930 co-relation queries the response was YES. [2024-02-07 14:41:28,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11771 conditions, 3831 events. 1969/3831 cut-off events. For 18930/18930 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 23934 event pairs, 148 based on Foata normal form. 184/3542 useless extension candidates. Maximal degree in co-relation 10682. Up to 897 conditions per place. [2024-02-07 14:41:28,910 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 138 selfloop transitions, 87 changer transitions 22/250 dead transitions. [2024-02-07 14:41:28,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 250 transitions, 2396 flow [2024-02-07 14:41:28,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-07 14:41:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-07 14:41:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 263 transitions. [2024-02-07 14:41:28,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43256578947368424 [2024-02-07 14:41:28,912 INFO L175 Difference]: Start difference. First operand has 71 places, 91 transitions, 961 flow. Second operand 19 states and 263 transitions. [2024-02-07 14:41:28,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 250 transitions, 2396 flow [2024-02-07 14:41:28,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 250 transitions, 2191 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-02-07 14:41:28,948 INFO L231 Difference]: Finished difference. Result has 88 places, 124 transitions, 1339 flow [2024-02-07 14:41:28,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1339, PETRI_PLACES=88, PETRI_TRANSITIONS=124} [2024-02-07 14:41:28,949 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 54 predicate places. [2024-02-07 14:41:28,949 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 124 transitions, 1339 flow [2024-02-07 14:41:28,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:28,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:28,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:28,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 14:41:29,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-02-07 14:41:29,160 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:29,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1845246687, now seen corresponding path program 1 times [2024-02-07 14:41:29,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:29,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251809746] [2024-02-07 14:41:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:29,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:41:29,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:29,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251809746] [2024-02-07 14:41:29,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251809746] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:41:29,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:41:29,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:41:29,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464765404] [2024-02-07 14:41:29,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:41:29,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:41:29,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:41:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:41:29,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-02-07 14:41:29,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 124 transitions, 1339 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:29,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:29,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-02-07 14:41:29,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:29,548 INFO L124 PetriNetUnfolderBase]: 1329/2781 cut-off events. [2024-02-07 14:41:29,548 INFO L125 PetriNetUnfolderBase]: For 14038/14099 co-relation queries the response was YES. [2024-02-07 14:41:29,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10009 conditions, 2781 events. 1329/2781 cut-off events. For 14038/14099 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 17940 event pairs, 725 based on Foata normal form. 136/2900 useless extension candidates. Maximal degree in co-relation 9521. Up to 2026 conditions per place. [2024-02-07 14:41:29,563 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 107 selfloop transitions, 25 changer transitions 0/140 dead transitions. [2024-02-07 14:41:29,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 140 transitions, 1735 flow [2024-02-07 14:41:29,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:41:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:41:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-02-07 14:41:29,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-02-07 14:41:29,565 INFO L175 Difference]: Start difference. First operand has 88 places, 124 transitions, 1339 flow. Second operand 4 states and 60 transitions. [2024-02-07 14:41:29,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 140 transitions, 1735 flow [2024-02-07 14:41:29,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 140 transitions, 1545 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-02-07 14:41:29,596 INFO L231 Difference]: Finished difference. Result has 86 places, 123 transitions, 1218 flow [2024-02-07 14:41:29,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1218, PETRI_PLACES=86, PETRI_TRANSITIONS=123} [2024-02-07 14:41:29,596 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2024-02-07 14:41:29,597 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 123 transitions, 1218 flow [2024-02-07 14:41:29,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:29,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:29,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:29,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 14:41:29,597 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:29,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1654986069, now seen corresponding path program 1 times [2024-02-07 14:41:29,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:29,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143207222] [2024-02-07 14:41:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:29,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:29,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:29,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143207222] [2024-02-07 14:41:29,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143207222] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:29,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060734827] [2024-02-07 14:41:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:29,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:29,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:29,685 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) [2024-02-07 14:41:29,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 14:41:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:29,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:41:29,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:29,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:29,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060734827] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:29,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:29,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-02-07 14:41:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670492951] [2024-02-07 14:41:29,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:29,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:41:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:29,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:41:29,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:41:30,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-02-07 14:41:30,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 123 transitions, 1218 flow. Second operand has 13 states, 13 states have (on average 9.0) internal successors, (117), 13 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:30,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:30,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-02-07 14:41:30,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:30,414 INFO L124 PetriNetUnfolderBase]: 2130/4032 cut-off events. [2024-02-07 14:41:30,414 INFO L125 PetriNetUnfolderBase]: For 18125/18125 co-relation queries the response was YES. [2024-02-07 14:41:30,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14840 conditions, 4032 events. 2130/4032 cut-off events. For 18125/18125 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 25087 event pairs, 372 based on Foata normal form. 168/4199 useless extension candidates. Maximal degree in co-relation 13508. Up to 2003 conditions per place. [2024-02-07 14:41:30,442 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 118 selfloop transitions, 67 changer transitions 6/194 dead transitions. [2024-02-07 14:41:30,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 194 transitions, 2176 flow [2024-02-07 14:41:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:41:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:41:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-02-07 14:41:30,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-02-07 14:41:30,443 INFO L175 Difference]: Start difference. First operand has 86 places, 123 transitions, 1218 flow. Second operand 7 states and 94 transitions. [2024-02-07 14:41:30,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 194 transitions, 2176 flow [2024-02-07 14:41:30,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 194 transitions, 2086 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-02-07 14:41:30,476 INFO L231 Difference]: Finished difference. Result has 92 places, 138 transitions, 1536 flow [2024-02-07 14:41:30,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1536, PETRI_PLACES=92, PETRI_TRANSITIONS=138} [2024-02-07 14:41:30,477 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 58 predicate places. [2024-02-07 14:41:30,477 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 138 transitions, 1536 flow [2024-02-07 14:41:30,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.0) internal successors, (117), 13 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:30,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:30,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:30,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 14:41:30,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:30,688 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:30,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash -536115494, now seen corresponding path program 2 times [2024-02-07 14:41:30,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:30,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693577182] [2024-02-07 14:41:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:30,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:30,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:30,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693577182] [2024-02-07 14:41:30,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693577182] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:30,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119583333] [2024-02-07 14:41:30,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:41:30,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:30,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:30,771 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) [2024-02-07 14:41:30,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 14:41:30,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:41:30,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:41:30,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:41:30,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:30,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:31,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119583333] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:31,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:31,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-02-07 14:41:31,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676973395] [2024-02-07 14:41:31,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:31,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 14:41:31,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:31,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 14:41:31,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2024-02-07 14:41:31,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-02-07 14:41:31,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 138 transitions, 1536 flow. Second operand has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:31,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:31,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-02-07 14:41:31,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:32,372 INFO L124 PetriNetUnfolderBase]: 5010/8814 cut-off events. [2024-02-07 14:41:32,373 INFO L125 PetriNetUnfolderBase]: For 45116/45116 co-relation queries the response was YES. [2024-02-07 14:41:32,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36224 conditions, 8814 events. 5010/8814 cut-off events. For 45116/45116 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 57893 event pairs, 450 based on Foata normal form. 316/8276 useless extension candidates. Maximal degree in co-relation 32378. Up to 1503 conditions per place. [2024-02-07 14:41:32,421 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 237 selfloop transitions, 285 changer transitions 41/565 dead transitions. [2024-02-07 14:41:32,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 565 transitions, 6631 flow [2024-02-07 14:41:32,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-07 14:41:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-07 14:41:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 344 transitions. [2024-02-07 14:41:32,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706896551724138 [2024-02-07 14:41:32,424 INFO L175 Difference]: Start difference. First operand has 92 places, 138 transitions, 1536 flow. Second operand 29 states and 344 transitions. [2024-02-07 14:41:32,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 565 transitions, 6631 flow [2024-02-07 14:41:32,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 565 transitions, 6515 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-02-07 14:41:32,539 INFO L231 Difference]: Finished difference. Result has 130 places, 370 transitions, 4795 flow [2024-02-07 14:41:32,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4795, PETRI_PLACES=130, PETRI_TRANSITIONS=370} [2024-02-07 14:41:32,540 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 96 predicate places. [2024-02-07 14:41:32,540 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 370 transitions, 4795 flow [2024-02-07 14:41:32,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:32,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:32,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:32,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 14:41:32,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:32,751 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:32,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:32,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2138809342, now seen corresponding path program 3 times [2024-02-07 14:41:32,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:32,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201426709] [2024-02-07 14:41:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:32,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:32,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:32,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201426709] [2024-02-07 14:41:32,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201426709] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:32,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806436288] [2024-02-07 14:41:32,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:41:32,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:32,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:32,884 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) [2024-02-07 14:41:32,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 14:41:32,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 14:41:32,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:41:32,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:41:32,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:33,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:33,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806436288] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:33,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:33,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-02-07 14:41:33,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233600099] [2024-02-07 14:41:33,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:33,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 14:41:33,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 14:41:33,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-02-07 14:41:33,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-02-07 14:41:33,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 370 transitions, 4795 flow. Second operand has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:33,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:33,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-02-07 14:41:33,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:34,951 INFO L124 PetriNetUnfolderBase]: 6034/10454 cut-off events. [2024-02-07 14:41:34,951 INFO L125 PetriNetUnfolderBase]: For 78700/78700 co-relation queries the response was YES. [2024-02-07 14:41:34,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55435 conditions, 10454 events. 6034/10454 cut-off events. For 78700/78700 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 69804 event pairs, 1939 based on Foata normal form. 64/10506 useless extension candidates. Maximal degree in co-relation 50713. Up to 7117 conditions per place. [2024-02-07 14:41:35,030 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 452 selfloop transitions, 143 changer transitions 2/599 dead transitions. [2024-02-07 14:41:35,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 599 transitions, 8293 flow [2024-02-07 14:41:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-07 14:41:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-07 14:41:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 209 transitions. [2024-02-07 14:41:35,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628472222222222 [2024-02-07 14:41:35,032 INFO L175 Difference]: Start difference. First operand has 130 places, 370 transitions, 4795 flow. Second operand 18 states and 209 transitions. [2024-02-07 14:41:35,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 599 transitions, 8293 flow [2024-02-07 14:41:35,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 599 transitions, 8163 flow, removed 65 selfloop flow, removed 0 redundant places. [2024-02-07 14:41:35,386 INFO L231 Difference]: Finished difference. Result has 154 places, 446 transitions, 5991 flow [2024-02-07 14:41:35,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4679, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5991, PETRI_PLACES=154, PETRI_TRANSITIONS=446} [2024-02-07 14:41:35,387 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 120 predicate places. [2024-02-07 14:41:35,387 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 446 transitions, 5991 flow [2024-02-07 14:41:35,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:35,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:35,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:35,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 14:41:35,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-02-07 14:41:35,601 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:35,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1628261256, now seen corresponding path program 4 times [2024-02-07 14:41:35,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:35,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854386947] [2024-02-07 14:41:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:35,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:35,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:35,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854386947] [2024-02-07 14:41:35,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854386947] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:35,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801116861] [2024-02-07 14:41:35,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:41:35,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:35,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:35,716 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) [2024-02-07 14:41:35,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 14:41:35,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:41:35,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:41:35,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:41:35,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:35,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:36,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801116861] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:36,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:36,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-02-07 14:41:36,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432211237] [2024-02-07 14:41:36,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:36,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:41:36,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:36,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:41:36,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:41:36,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-02-07 14:41:36,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 446 transitions, 5991 flow. Second operand has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 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) [2024-02-07 14:41:36,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:36,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-02-07 14:41:36,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:38,345 INFO L124 PetriNetUnfolderBase]: 6593/11363 cut-off events. [2024-02-07 14:41:38,345 INFO L125 PetriNetUnfolderBase]: For 110316/110316 co-relation queries the response was YES. [2024-02-07 14:41:38,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65491 conditions, 11363 events. 6593/11363 cut-off events. For 110316/110316 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 76258 event pairs, 150 based on Foata normal form. 94/11445 useless extension candidates. Maximal degree in co-relation 58554. Up to 2218 conditions per place. [2024-02-07 14:41:38,425 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 252 selfloop transitions, 497 changer transitions 50/801 dead transitions. [2024-02-07 14:41:38,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 801 transitions, 10842 flow [2024-02-07 14:41:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-07 14:41:38,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-07 14:41:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 338 transitions. [2024-02-07 14:41:38,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35208333333333336 [2024-02-07 14:41:38,427 INFO L175 Difference]: Start difference. First operand has 154 places, 446 transitions, 5991 flow. Second operand 30 states and 338 transitions. [2024-02-07 14:41:38,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 801 transitions, 10842 flow [2024-02-07 14:41:39,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 801 transitions, 10529 flow, removed 117 selfloop flow, removed 2 redundant places. [2024-02-07 14:41:39,097 INFO L231 Difference]: Finished difference. Result has 198 places, 592 transitions, 9399 flow [2024-02-07 14:41:39,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5835, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=9399, PETRI_PLACES=198, PETRI_TRANSITIONS=592} [2024-02-07 14:41:39,098 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 164 predicate places. [2024-02-07 14:41:39,098 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 592 transitions, 9399 flow [2024-02-07 14:41:39,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 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) [2024-02-07 14:41:39,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:39,099 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:39,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 14:41:39,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:39,309 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:39,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1418245494, now seen corresponding path program 5 times [2024-02-07 14:41:39,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:39,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559147041] [2024-02-07 14:41:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:39,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:39,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:39,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559147041] [2024-02-07 14:41:39,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559147041] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:39,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435453929] [2024-02-07 14:41:39,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:41:39,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:39,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:39,400 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) [2024-02-07 14:41:39,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 14:41:39,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-07 14:41:39,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:41:39,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:41:39,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:39,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:39,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435453929] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:39,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:39,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-02-07 14:41:39,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667945525] [2024-02-07 14:41:39,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:39,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:41:39,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:39,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:41:39,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-02-07 14:41:39,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-02-07 14:41:39,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 592 transitions, 9399 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:39,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:39,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-02-07 14:41:39,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:42,770 INFO L124 PetriNetUnfolderBase]: 7832/13346 cut-off events. [2024-02-07 14:41:42,770 INFO L125 PetriNetUnfolderBase]: For 216150/216150 co-relation queries the response was YES. [2024-02-07 14:41:42,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91380 conditions, 13346 events. 7832/13346 cut-off events. For 216150/216150 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 91421 event pairs, 634 based on Foata normal form. 78/13424 useless extension candidates. Maximal degree in co-relation 84491. Up to 3267 conditions per place. [2024-02-07 14:41:42,881 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 464 selfloop transitions, 498 changer transitions 0/964 dead transitions. [2024-02-07 14:41:42,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 964 transitions, 16376 flow [2024-02-07 14:41:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-07 14:41:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-07 14:41:42,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 325 transitions. [2024-02-07 14:41:42,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35021551724137934 [2024-02-07 14:41:42,883 INFO L175 Difference]: Start difference. First operand has 198 places, 592 transitions, 9399 flow. Second operand 29 states and 325 transitions. [2024-02-07 14:41:42,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 964 transitions, 16376 flow [2024-02-07 14:41:44,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 964 transitions, 15821 flow, removed 79 selfloop flow, removed 8 redundant places. [2024-02-07 14:41:44,357 INFO L231 Difference]: Finished difference. Result has 231 places, 804 transitions, 13614 flow [2024-02-07 14:41:44,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=8985, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=13614, PETRI_PLACES=231, PETRI_TRANSITIONS=804} [2024-02-07 14:41:44,358 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 197 predicate places. [2024-02-07 14:41:44,359 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 804 transitions, 13614 flow [2024-02-07 14:41:44,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:44,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:44,359 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:44,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 14:41:44,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:44,569 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:44,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash -306547150, now seen corresponding path program 6 times [2024-02-07 14:41:44,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:44,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209873055] [2024-02-07 14:41:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:44,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:44,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:44,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209873055] [2024-02-07 14:41:44,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209873055] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:44,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324861547] [2024-02-07 14:41:44,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:41:44,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:44,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:44,660 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) [2024-02-07 14:41:44,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 14:41:44,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-07 14:41:44,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:41:44,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:41:44,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:44,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:44,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324861547] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:44,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:44,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-02-07 14:41:44,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009997693] [2024-02-07 14:41:44,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:44,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:41:44,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:44,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:41:44,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:41:44,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-02-07 14:41:44,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 804 transitions, 13614 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 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) [2024-02-07 14:41:44,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:44,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-02-07 14:41:44,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:48,327 INFO L124 PetriNetUnfolderBase]: 8295/14163 cut-off events. [2024-02-07 14:41:48,327 INFO L125 PetriNetUnfolderBase]: For 269589/269589 co-relation queries the response was YES. [2024-02-07 14:41:48,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104070 conditions, 14163 events. 8295/14163 cut-off events. For 269589/269589 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 98139 event pairs, 318 based on Foata normal form. 60/14223 useless extension candidates. Maximal degree in co-relation 100455. Up to 5390 conditions per place. [2024-02-07 14:41:48,435 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 357 selfloop transitions, 615 changer transitions 4/978 dead transitions. [2024-02-07 14:41:48,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 978 transitions, 17840 flow [2024-02-07 14:41:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 14:41:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 14:41:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 199 transitions. [2024-02-07 14:41:48,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36580882352941174 [2024-02-07 14:41:48,437 INFO L175 Difference]: Start difference. First operand has 231 places, 804 transitions, 13614 flow. Second operand 17 states and 199 transitions. [2024-02-07 14:41:48,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 978 transitions, 17840 flow [2024-02-07 14:41:51,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 978 transitions, 17482 flow, removed 179 selfloop flow, removed 0 redundant places. [2024-02-07 14:41:51,806 INFO L231 Difference]: Finished difference. Result has 251 places, 867 transitions, 16222 flow [2024-02-07 14:41:51,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=13302, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=551, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=16222, PETRI_PLACES=251, PETRI_TRANSITIONS=867} [2024-02-07 14:41:51,807 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 217 predicate places. [2024-02-07 14:41:51,807 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 867 transitions, 16222 flow [2024-02-07 14:41:51,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 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) [2024-02-07 14:41:51,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:51,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:51,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-02-07 14:41:52,012 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,SelfDestructingSolverStorable14 [2024-02-07 14:41:52,012 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:41:52,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:52,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1336846438, now seen corresponding path program 7 times [2024-02-07 14:41:52,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:52,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348245084] [2024-02-07 14:41:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:52,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:52,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:52,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348245084] [2024-02-07 14:41:52,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348245084] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:52,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265149433] [2024-02-07 14:41:52,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:41:52,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:52,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:52,102 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) [2024-02-07 14:41:52,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-07 14:41:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:52,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:41:52,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:52,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:52,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265149433] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:52,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:52,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-02-07 14:41:52,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884858240] [2024-02-07 14:41:52,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:52,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:41:52,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:52,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:41:52,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-02-07 14:41:52,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-02-07 14:41:52,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 867 transitions, 16222 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:52,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:52,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-02-07 14:41:52,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:56,546 INFO L124 PetriNetUnfolderBase]: 8728/14998 cut-off events. [2024-02-07 14:41:56,546 INFO L125 PetriNetUnfolderBase]: For 261073/261073 co-relation queries the response was YES. [2024-02-07 14:41:56,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112949 conditions, 14998 events. 8728/14998 cut-off events. For 261073/261073 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 106033 event pairs, 407 based on Foata normal form. 146/15144 useless extension candidates. Maximal degree in co-relation 109705. Up to 2718 conditions per place. [2024-02-07 14:41:56,710 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 302 selfloop transitions, 839 changer transitions 1/1144 dead transitions. [2024-02-07 14:41:56,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 1144 transitions, 22271 flow [2024-02-07 14:41:56,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-02-07 14:41:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-02-07 14:41:56,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 448 transitions. [2024-02-07 14:41:56,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-02-07 14:41:56,712 INFO L175 Difference]: Start difference. First operand has 251 places, 867 transitions, 16222 flow. Second operand 41 states and 448 transitions. [2024-02-07 14:41:56,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 1144 transitions, 22271 flow [2024-02-07 14:42:00,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1144 transitions, 22107 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-02-07 14:42:00,232 INFO L231 Difference]: Finished difference. Result has 307 places, 997 transitions, 21245 flow [2024-02-07 14:42:00,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=16074, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=720, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=21245, PETRI_PLACES=307, PETRI_TRANSITIONS=997} [2024-02-07 14:42:00,233 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 273 predicate places. [2024-02-07 14:42:00,233 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 997 transitions, 21245 flow [2024-02-07 14:42:00,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:42:00,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:00,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:00,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-07 14:42:00,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-07 14:42:00,444 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:42:00,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash 154670744, now seen corresponding path program 8 times [2024-02-07 14:42:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:00,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841178500] [2024-02-07 14:42:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:00,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:00,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841178500] [2024-02-07 14:42:00,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841178500] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:42:00,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866542132] [2024-02-07 14:42:00,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:42:00,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:42:00,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:42:00,529 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) [2024-02-07 14:42:00,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-07 14:42:00,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:42:00,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:42:00,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:42:00,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:42:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:00,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:42:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:00,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866542132] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:42:00,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:42:00,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-02-07 14:42:00,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740290715] [2024-02-07 14:42:00,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:42:00,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:42:00,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:42:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-02-07 14:42:00,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-02-07 14:42:00,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 997 transitions, 21245 flow. Second operand has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:42:00,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:00,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-02-07 14:42:00,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:06,292 INFO L124 PetriNetUnfolderBase]: 10321/17767 cut-off events. [2024-02-07 14:42:06,292 INFO L125 PetriNetUnfolderBase]: For 411533/411533 co-relation queries the response was YES. [2024-02-07 14:42:06,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150911 conditions, 17767 events. 10321/17767 cut-off events. For 411533/411533 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 129803 event pairs, 654 based on Foata normal form. 148/17915 useless extension candidates. Maximal degree in co-relation 146512. Up to 6028 conditions per place. [2024-02-07 14:42:06,495 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 498 selfloop transitions, 871 changer transitions 9/1380 dead transitions. [2024-02-07 14:42:06,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 1380 transitions, 31234 flow [2024-02-07 14:42:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 14:42:06,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 14:42:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 206 transitions. [2024-02-07 14:42:06,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3786764705882353 [2024-02-07 14:42:06,497 INFO L175 Difference]: Start difference. First operand has 307 places, 997 transitions, 21245 flow. Second operand 17 states and 206 transitions. [2024-02-07 14:42:06,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 1380 transitions, 31234 flow [2024-02-07 14:42:13,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1380 transitions, 30648 flow, removed 163 selfloop flow, removed 8 redundant places. [2024-02-07 14:42:13,213 INFO L231 Difference]: Finished difference. Result has 324 places, 1221 transitions, 29134 flow [2024-02-07 14:42:13,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=20843, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=647, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=29134, PETRI_PLACES=324, PETRI_TRANSITIONS=1221} [2024-02-07 14:42:13,215 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 290 predicate places. [2024-02-07 14:42:13,215 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 1221 transitions, 29134 flow [2024-02-07 14:42:13,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:42:13,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:13,215 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:13,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-02-07 14:42:13,426 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,SelfDestructingSolverStorable16 [2024-02-07 14:42:13,427 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:42:13,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:13,427 INFO L85 PathProgramCache]: Analyzing trace with hash -589740878, now seen corresponding path program 9 times [2024-02-07 14:42:13,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:13,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183260039] [2024-02-07 14:42:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:13,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:13,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:13,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183260039] [2024-02-07 14:42:13,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183260039] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:42:13,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584536499] [2024-02-07 14:42:13,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:42:13,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:42:13,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:42:13,509 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) [2024-02-07 14:42:13,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-07 14:42:13,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 14:42:13,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:42:13,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:42:13,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:42:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:13,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:42:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:13,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584536499] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:42:13,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:42:13,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-02-07 14:42:13,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619299245] [2024-02-07 14:42:13,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:42:13,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-07 14:42:13,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:13,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-07 14:42:13,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-02-07 14:42:13,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-02-07 14:42:13,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 1221 transitions, 29134 flow. Second operand has 18 states, 18 states have (on average 7.222222222222222) internal successors, (130), 18 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:42:13,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:13,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-02-07 14:42:13,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:22,791 INFO L124 PetriNetUnfolderBase]: 14384/24666 cut-off events. [2024-02-07 14:42:22,791 INFO L125 PetriNetUnfolderBase]: For 744090/744090 co-relation queries the response was YES. [2024-02-07 14:42:22,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232307 conditions, 24666 events. 14384/24666 cut-off events. For 744090/744090 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 188632 event pairs, 806 based on Foata normal form. 296/24962 useless extension candidates. Maximal degree in co-relation 226353. Up to 6100 conditions per place. [2024-02-07 14:42:23,124 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 683 selfloop transitions, 1341 changer transitions 20/2046 dead transitions. [2024-02-07 14:42:23,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 2046 transitions, 50914 flow [2024-02-07 14:42:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-07 14:42:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-07 14:42:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 397 transitions. [2024-02-07 14:42:23,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35446428571428573 [2024-02-07 14:42:23,132 INFO L175 Difference]: Start difference. First operand has 324 places, 1221 transitions, 29134 flow. Second operand 35 states and 397 transitions. [2024-02-07 14:42:23,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 2046 transitions, 50914 flow [2024-02-07 14:42:37,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 2046 transitions, 49802 flow, removed 159 selfloop flow, removed 10 redundant places. [2024-02-07 14:42:37,492 INFO L231 Difference]: Finished difference. Result has 365 places, 1741 transitions, 46168 flow [2024-02-07 14:42:37,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=28276, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=830, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=46168, PETRI_PLACES=365, PETRI_TRANSITIONS=1741} [2024-02-07 14:42:37,493 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 331 predicate places. [2024-02-07 14:42:37,493 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 1741 transitions, 46168 flow [2024-02-07 14:42:37,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.222222222222222) internal successors, (130), 18 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:42:37,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:37,494 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:37,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-07 14:42:37,695 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,SelfDestructingSolverStorable17 [2024-02-07 14:42:37,695 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:42:37,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:37,696 INFO L85 PathProgramCache]: Analyzing trace with hash 733455922, now seen corresponding path program 10 times [2024-02-07 14:42:37,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:37,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306950951] [2024-02-07 14:42:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:37,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:37,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306950951] [2024-02-07 14:42:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306950951] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:42:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085125175] [2024-02-07 14:42:37,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:42:37,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:42:37,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:42:37,758 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) [2024-02-07 14:42:37,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-07 14:42:37,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:42:37,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:42:37,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:42:37,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:42:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:37,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:42:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:37,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085125175] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:42:37,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:42:37,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-02-07 14:42:37,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871887589] [2024-02-07 14:42:37,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:42:37,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-07 14:42:37,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:37,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-07 14:42:37,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2024-02-07 14:42:38,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-02-07 14:42:38,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1741 transitions, 46168 flow. Second operand has 18 states, 18 states have (on average 7.055555555555555) internal successors, (127), 18 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:42:38,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:38,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-02-07 14:42:38,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:49,997 INFO L124 PetriNetUnfolderBase]: 15453/26359 cut-off events. [2024-02-07 14:42:49,997 INFO L125 PetriNetUnfolderBase]: For 1028413/1028413 co-relation queries the response was YES. [2024-02-07 14:42:50,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271641 conditions, 26359 events. 15453/26359 cut-off events. For 1028413/1028413 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 203289 event pairs, 1379 based on Foata normal form. 54/26413 useless extension candidates. Maximal degree in co-relation 267839. Up to 7574 conditions per place. [2024-02-07 14:42:50,353 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 1033 selfloop transitions, 1065 changer transitions 4/2104 dead transitions. [2024-02-07 14:42:50,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 2104 transitions, 57825 flow [2024-02-07 14:42:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-07 14:42:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-07 14:42:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 340 transitions. [2024-02-07 14:42:50,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33203125 [2024-02-07 14:42:50,354 INFO L175 Difference]: Start difference. First operand has 365 places, 1741 transitions, 46168 flow. Second operand 32 states and 340 transitions. [2024-02-07 14:42:50,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 2104 transitions, 57825 flow [2024-02-07 14:43:11,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 2104 transitions, 56582 flow, removed 284 selfloop flow, removed 11 redundant places. [2024-02-07 14:43:11,451 INFO L231 Difference]: Finished difference. Result has 397 places, 1917 transitions, 52530 flow [2024-02-07 14:43:11,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=45189, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=894, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=830, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=52530, PETRI_PLACES=397, PETRI_TRANSITIONS=1917} [2024-02-07 14:43:11,453 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 363 predicate places. [2024-02-07 14:43:11,453 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1917 transitions, 52530 flow [2024-02-07 14:43:11,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.055555555555555) internal successors, (127), 18 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:11,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:11,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:11,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:11,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:11,665 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:11,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2000913100, now seen corresponding path program 11 times [2024-02-07 14:43:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:11,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982599008] [2024-02-07 14:43:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:11,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:11,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:11,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982599008] [2024-02-07 14:43:11,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982599008] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:11,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468215391] [2024-02-07 14:43:11,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:43:11,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:11,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:11,753 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) [2024-02-07 14:43:11,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-07 14:43:11,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-07 14:43:11,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:11,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:11,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:11,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:12,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468215391] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:12,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:12,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-02-07 14:43:12,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396161961] [2024-02-07 14:43:12,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:12,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 14:43:12,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:12,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 14:43:12,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-02-07 14:43:12,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-02-07 14:43:12,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1917 transitions, 52530 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 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) [2024-02-07 14:43:12,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:12,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-02-07 14:43:12,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:26,512 INFO L124 PetriNetUnfolderBase]: 15398/26252 cut-off events. [2024-02-07 14:43:26,512 INFO L125 PetriNetUnfolderBase]: For 1147217/1147217 co-relation queries the response was YES. [2024-02-07 14:43:26,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282162 conditions, 26252 events. 15398/26252 cut-off events. For 1147217/1147217 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 202207 event pairs, 1354 based on Foata normal form. 76/26328 useless extension candidates. Maximal degree in co-relation 280280. Up to 7589 conditions per place. [2024-02-07 14:43:27,110 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 939 selfloop transitions, 1104 changer transitions 3/2048 dead transitions. [2024-02-07 14:43:27,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 2048 transitions, 58836 flow [2024-02-07 14:43:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-07 14:43:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-07 14:43:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 271 transitions. [2024-02-07 14:43:27,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3528645833333333 [2024-02-07 14:43:27,112 INFO L175 Difference]: Start difference. First operand has 397 places, 1917 transitions, 52530 flow. Second operand 24 states and 271 transitions. [2024-02-07 14:43:27,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 2048 transitions, 58836 flow [2024-02-07 14:43:51,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 2048 transitions, 58427 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:51,629 INFO L231 Difference]: Finished difference. Result has 417 places, 1936 transitions, 55224 flow [2024-02-07 14:43:51,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=51886, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=831, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=55224, PETRI_PLACES=417, PETRI_TRANSITIONS=1936} [2024-02-07 14:43:51,631 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 383 predicate places. [2024-02-07 14:43:51,631 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 1936 transitions, 55224 flow [2024-02-07 14:43:51,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 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) [2024-02-07 14:43:51,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:51,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:51,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:51,842 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,SelfDestructingSolverStorable19 [2024-02-07 14:43:51,843 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:51,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:51,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1593114288, now seen corresponding path program 12 times [2024-02-07 14:43:51,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:51,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769189202] [2024-02-07 14:43:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:51,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:51,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:51,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769189202] [2024-02-07 14:43:51,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769189202] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:51,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88668358] [2024-02-07 14:43:51,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:43:51,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:51,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:51,916 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) [2024-02-07 14:43:51,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-07 14:43:52,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-07 14:43:52,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:52,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:43:52,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:52,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:52,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88668358] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:52,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:52,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-02-07 14:43:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669590535] [2024-02-07 14:43:52,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:52,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-07 14:43:52,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-07 14:43:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-02-07 14:43:52,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-02-07 14:43:52,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1936 transitions, 55224 flow. Second operand has 18 states, 18 states have (on average 7.055555555555555) internal successors, (127), 18 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:52,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:52,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-02-07 14:43:52,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:44:07,016 INFO L124 PetriNetUnfolderBase]: 15240/25728 cut-off events. [2024-02-07 14:44:07,017 INFO L125 PetriNetUnfolderBase]: For 1130251/1130251 co-relation queries the response was YES. [2024-02-07 14:44:07,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280551 conditions, 25728 events. 15240/25728 cut-off events. For 1130251/1130251 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 195518 event pairs, 1475 based on Foata normal form. 44/25772 useless extension candidates. Maximal degree in co-relation 279141. Up to 7428 conditions per place. [2024-02-07 14:44:07,718 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 1142 selfloop transitions, 891 changer transitions 4/2039 dead transitions. [2024-02-07 14:44:07,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 2039 transitions, 61039 flow [2024-02-07 14:44:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-07 14:44:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-07 14:44:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 216 transitions. [2024-02-07 14:44:07,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35526315789473684 [2024-02-07 14:44:07,720 INFO L175 Difference]: Start difference. First operand has 417 places, 1936 transitions, 55224 flow. Second operand 19 states and 216 transitions. [2024-02-07 14:44:07,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 2039 transitions, 61039 flow [2024-02-07 14:44:32,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 2039 transitions, 60347 flow, removed 16 selfloop flow, removed 14 redundant places. [2024-02-07 14:44:32,734 INFO L231 Difference]: Finished difference. Result has 423 places, 1948 transitions, 57060 flow [2024-02-07 14:44:32,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=54551, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=879, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1054, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=57060, PETRI_PLACES=423, PETRI_TRANSITIONS=1948} [2024-02-07 14:44:32,736 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 389 predicate places. [2024-02-07 14:44:32,737 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 1948 transitions, 57060 flow [2024-02-07 14:44:32,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.055555555555555) internal successors, (127), 18 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:44:32,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:44:32,737 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:44:32,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-07 14:44:32,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:44:32,949 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:44:32,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:44:32,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1270487704, now seen corresponding path program 13 times [2024-02-07 14:44:32,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:44:32,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192745463] [2024-02-07 14:44:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:44:32,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:44:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:33,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:44:33,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192745463] [2024-02-07 14:44:33,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192745463] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:44:33,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965350785] [2024-02-07 14:44:33,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:44:33,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:44:33,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:44:33,044 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) [2024-02-07 14:44:33,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-07 14:44:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:33,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:44:33,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:44:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:33,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:44:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:33,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965350785] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:44:33,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:44:33,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-02-07 14:44:33,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100088683] [2024-02-07 14:44:33,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:44:33,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-07 14:44:33,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:44:33,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-07 14:44:33,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-02-07 14:44:33,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-02-07 14:44:33,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 1948 transitions, 57060 flow. Second operand has 18 states, 18 states have (on average 7.222222222222222) internal successors, (130), 18 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:44:33,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:44:33,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-02-07 14:44:33,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand