./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack-1.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/stack-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d8006e4b 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/pthread/stack-1.i ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/stack-1.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-d8006e4-m [2024-02-05 10:25:22,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:25:22,275 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:25:22,279 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:25:22,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:25:22,301 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:25:22,303 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:25:22,303 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:25:22,303 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:25:22,306 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:25:22,307 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:25:22,307 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:25:22,308 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:25:22,308 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:25:22,309 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:25:22,309 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:25:22,309 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:25:22,309 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:25:22,309 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:25:22,310 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:25:22,310 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:25:22,310 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:25:22,310 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:25:22,310 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:25:22,311 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:25:22,311 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:25:22,311 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:25:22,311 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:25:22,312 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:25:22,312 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:25:22,313 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:25:22,313 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:25:22,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:25:22,313 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:25:22,313 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:25:22,313 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:25:22,314 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:25:22,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:25:22,314 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:25:22,314 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:25:22,314 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:25:22,314 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:25:22,314 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:25:22,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:25:22,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:25:22,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:25:22,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:25:22,569 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:25:22,569 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:25:22,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2024-02-05 10:25:23,587 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:25:23,870 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:25:23,871 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2024-02-05 10:25:23,893 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/353e4e61b/831363a2aab94134bc7f0deb49e789bd/FLAG79845ef5f [2024-02-05 10:25:24,138 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/353e4e61b/831363a2aab94134bc7f0deb49e789bd [2024-02-05 10:25:24,140 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:25:24,141 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:25:24,143 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/stack-1.yml/witness.yml [2024-02-05 10:25:24,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:25:24,233 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:25:24,235 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:25:24,235 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:25:24,239 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:25:24,239 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:25:24" (1/2) ... [2024-02-05 10:25:24,240 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@367db94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:25:24, skipping insertion in model container [2024-02-05 10:25:24,240 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:25:24" (1/2) ... [2024-02-05 10:25:24,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a5799bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:25:24, skipping insertion in model container [2024-02-05 10:25:24,242 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:25:24" (2/2) ... [2024-02-05 10:25:24,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@367db94 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24, skipping insertion in model container [2024-02-05 10:25:24,243 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:25:24" (2/2) ... [2024-02-05 10:25:24,243 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:25:24,301 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:25:24,303 INFO L101 nessWitnessExtractor]: Location invariant before [L1001-L1001] (i == 5) && ((unsigned long )arg == 0UL) [2024-02-05 10:25:24,303 INFO L101 nessWitnessExtractor]: Location invariant before [L998-L998] ((unsigned long )arg == 0UL) && ((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || i == 4) [2024-02-05 10:25:24,303 INFO L101 nessWitnessExtractor]: Location invariant before [L995-L995] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-05 10:25:24,303 INFO L101 nessWitnessExtractor]: Location invariant before [L994-L994] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-05 10:25:24,303 INFO L101 nessWitnessExtractor]: Loop invariant at [L1006-L1006] (unsigned long )arg == 0UL [2024-02-05 10:25:24,304 INFO L101 nessWitnessExtractor]: Location invariant before [L1016-L1016] (i == 5) && ((unsigned long )arg == 0UL) [2024-02-05 10:25:24,304 INFO L101 nessWitnessExtractor]: Location invariant before [L996-L996] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-05 10:25:24,304 INFO L101 nessWitnessExtractor]: Location invariant before [L1022-L1022] flag == (_Bool)0 [2024-02-05 10:25:24,304 INFO L101 nessWitnessExtractor]: Location invariant before [L999-L999] ((unsigned long )arg == 0UL) && ((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || i == 4) [2024-02-05 10:25:24,304 INFO L101 nessWitnessExtractor]: Location invariant before [L1014-L1014] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-05 10:25:24,304 INFO L101 nessWitnessExtractor]: Location invariant before [L1012-L1012] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-05 10:25:24,305 INFO L101 nessWitnessExtractor]: Location invariant before [L1021-L1021] flag == (_Bool)0 [2024-02-05 10:25:24,305 INFO L101 nessWitnessExtractor]: Location invariant before [L1009-L1009] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-05 10:25:24,305 INFO L101 nessWitnessExtractor]: Location invariant before [L1011-L1011] ((unsigned long )arg == 0UL) && ((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) [2024-02-05 10:25:24,305 INFO L101 nessWitnessExtractor]: Location invariant before [L1008-L1008] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-05 10:25:24,305 INFO L101 nessWitnessExtractor]: Location invariant before [L997-L997] ((unsigned long )arg == 0UL) && (((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) || i == 4) [2024-02-05 10:25:24,305 INFO L101 nessWitnessExtractor]: Loop invariant at [L992-L992] (unsigned long )arg == 0UL [2024-02-05 10:25:24,348 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:25:24,736 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] [2024-02-05 10:25:24,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:25:24,776 INFO L204 MainTranslator]: Completed pre-run [2024-02-05 10:25:24,812 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:25:24,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:25:24,898 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:25:24,899 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24 WrapperNode [2024-02-05 10:25:24,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:25:24,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:25:24,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:25:24,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:25:24,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (1/1) ... [2024-02-05 10:25:24,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (1/1) ... [2024-02-05 10:25:24,947 INFO L138 Inliner]: procedures = 278, calls = 45, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 177 [2024-02-05 10:25:24,951 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:25:24,951 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:25:24,952 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:25:24,952 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:25:24,960 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (1/1) ... [2024-02-05 10:25:24,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (1/1) ... [2024-02-05 10:25:24,964 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (1/1) ... [2024-02-05 10:25:24,982 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 2, 2, 5, 7]. 39 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 0, 0, 5, 5]. The 3 writes are split as follows [0, 1, 1, 0, 1]. [2024-02-05 10:25:24,982 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (1/1) ... [2024-02-05 10:25:24,982 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (1/1) ... [2024-02-05 10:25:24,988 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (1/1) ... [2024-02-05 10:25:24,990 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (1/1) ... [2024-02-05 10:25:24,992 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (1/1) ... [2024-02-05 10:25:24,993 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (1/1) ... [2024-02-05 10:25:24,995 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:25:24,996 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:25:24,996 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:25:24,996 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:25:24,997 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (1/1) ... [2024-02-05 10:25:25,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:25:25,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:25,022 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) [2024-02-05 10:25:25,037 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 [2024-02-05 10:25:25,047 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-05 10:25:25,047 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-05 10:25:25,047 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-05 10:25:25,047 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-05 10:25:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:25:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:25:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-05 10:25:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-05 10:25:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-05 10:25:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-05 10:25:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-05 10:25:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-05 10:25:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:25:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:25:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:25:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-05 10:25:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-05 10:25:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-05 10:25:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:25:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:25:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:25:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:25:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-05 10:25:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-05 10:25:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:25:25,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:25:25,051 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-05 10:25:25,162 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:25:25,164 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:25:25,391 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:25:25,391 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:25:25,556 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:25:25,557 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-05 10:25:25,558 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:25:25 BoogieIcfgContainer [2024-02-05 10:25:25,558 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:25:25,560 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:25:25,561 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:25:25,563 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:25:25,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:25:24" (1/4) ... [2024-02-05 10:25:25,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db75df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:25:25, skipping insertion in model container [2024-02-05 10:25:25,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:25:24" (2/4) ... [2024-02-05 10:25:25,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db75df5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:25:25, skipping insertion in model container [2024-02-05 10:25:25,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:24" (3/4) ... [2024-02-05 10:25:25,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db75df5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:25:25, skipping insertion in model container [2024-02-05 10:25:25,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:25:25" (4/4) ... [2024-02-05 10:25:25,570 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-02-05 10:25:25,583 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:25:25,583 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-02-05 10:25:25,583 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:25:25,659 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-05 10:25:25,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 69 transitions, 152 flow [2024-02-05 10:25:25,736 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2024-02-05 10:25:25,736 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:25:25,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2024-02-05 10:25:25,739 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 69 transitions, 152 flow [2024-02-05 10:25:25,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 139 flow [2024-02-05 10:25:25,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:25:25,763 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;@13f3c314, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:25:25,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-02-05 10:25:25,766 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:25:25,767 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:25:25,767 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:25:25,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:25,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:25:25,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:25,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash 14567, now seen corresponding path program 1 times [2024-02-05 10:25:25,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:25,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079223772] [2024-02-05 10:25:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:25,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:26,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:26,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079223772] [2024-02-05 10:25:26,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079223772] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:26,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:26,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:25:26,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28768201] [2024-02-05 10:25:26,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:26,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:25:26,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:26,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:25:26,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:25:26,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-05 10:25:26,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-02-05 10:25:26,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:26,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-05 10:25:26,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:26,301 INFO L124 PetriNetUnfolderBase]: 411/1082 cut-off events. [2024-02-05 10:25:26,302 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-02-05 10:25:26,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 1082 events. 411/1082 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6940 event pairs, 337 based on Foata normal form. 48/924 useless extension candidates. Maximal degree in co-relation 1690. Up to 686 conditions per place. [2024-02-05 10:25:26,312 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 30 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2024-02-05 10:25:26,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 193 flow [2024-02-05 10:25:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:25:26,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:25:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-02-05 10:25:26,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6328502415458938 [2024-02-05 10:25:26,322 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 139 flow. Second operand 3 states and 131 transitions. [2024-02-05 10:25:26,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 193 flow [2024-02-05 10:25:26,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-05 10:25:26,327 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 128 flow [2024-02-05 10:25:26,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-02-05 10:25:26,330 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2024-02-05 10:25:26,331 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 128 flow [2024-02-05 10:25:26,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-02-05 10:25:26,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:26,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-05 10:25:26,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:25:26,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:26,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:26,332 INFO L85 PathProgramCache]: Analyzing trace with hash 582899403, now seen corresponding path program 1 times [2024-02-05 10:25:26,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:26,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253658469] [2024-02-05 10:25:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:26,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:26,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:26,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253658469] [2024-02-05 10:25:26,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253658469] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:26,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:26,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:25:26,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117124791] [2024-02-05 10:25:26,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:26,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:25:26,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:26,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:25:26,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:25:26,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-02-05 10:25:26,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-02-05 10:25:26,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:26,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-02-05 10:25:26,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:26,618 INFO L124 PetriNetUnfolderBase]: 428/1053 cut-off events. [2024-02-05 10:25:26,619 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-05 10:25:26,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 1053 events. 428/1053 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6725 event pairs, 30 based on Foata normal form. 0/897 useless extension candidates. Maximal degree in co-relation 1789. Up to 678 conditions per place. [2024-02-05 10:25:26,623 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 42 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-02-05 10:25:26,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 242 flow [2024-02-05 10:25:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:25:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:25:26,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-02-05 10:25:26,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-02-05 10:25:26,625 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 128 flow. Second operand 4 states and 177 transitions. [2024-02-05 10:25:26,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 242 flow [2024-02-05 10:25:26,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 73 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:25:26,627 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 129 flow [2024-02-05 10:25:26,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-02-05 10:25:26,627 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2024-02-05 10:25:26,628 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 129 flow [2024-02-05 10:25:26,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-02-05 10:25:26,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:26,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:26,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:25:26,628 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:26,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1819902493, now seen corresponding path program 1 times [2024-02-05 10:25:26,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:26,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377194849] [2024-02-05 10:25:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:26,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:26,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:26,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377194849] [2024-02-05 10:25:26,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377194849] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:26,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:26,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:25:26,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113234876] [2024-02-05 10:25:26,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:26,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:25:26,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:26,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:25:26,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:25:26,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-02-05 10:25:26,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2024-02-05 10:25:26,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:26,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-02-05 10:25:26,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:26,915 INFO L124 PetriNetUnfolderBase]: 393/1070 cut-off events. [2024-02-05 10:25:26,915 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-02-05 10:25:26,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1774 conditions, 1070 events. 393/1070 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7012 event pairs, 11 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 1768. Up to 564 conditions per place. [2024-02-05 10:25:26,922 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 56 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-02-05 10:25:26,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 302 flow [2024-02-05 10:25:26,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:25:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:25:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-02-05 10:25:26,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6920289855072463 [2024-02-05 10:25:26,927 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 129 flow. Second operand 4 states and 191 transitions. [2024-02-05 10:25:26,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 302 flow [2024-02-05 10:25:26,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:25:26,930 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 128 flow [2024-02-05 10:25:26,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-02-05 10:25:26,931 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2024-02-05 10:25:26,931 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 128 flow [2024-02-05 10:25:26,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2024-02-05 10:25:26,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:26,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:26,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:25:26,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:26,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1820593646, now seen corresponding path program 1 times [2024-02-05 10:25:26,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:26,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687017897] [2024-02-05 10:25:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:26,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:27,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:27,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687017897] [2024-02-05 10:25:27,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687017897] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:27,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:27,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:25:27,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577226696] [2024-02-05 10:25:27,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:27,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:25:27,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:25:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:25:27,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-02-05 10:25:27,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:27,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:27,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-02-05 10:25:27,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:27,249 INFO L124 PetriNetUnfolderBase]: 882/1932 cut-off events. [2024-02-05 10:25:27,250 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-02-05 10:25:27,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3552 conditions, 1932 events. 882/1932 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 12144 event pairs, 526 based on Foata normal form. 88/1721 useless extension candidates. Maximal degree in co-relation 3546. Up to 1018 conditions per place. [2024-02-05 10:25:27,260 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 56 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-02-05 10:25:27,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 292 flow [2024-02-05 10:25:27,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:25:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:25:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2024-02-05 10:25:27,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7053140096618358 [2024-02-05 10:25:27,262 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 128 flow. Second operand 3 states and 146 transitions. [2024-02-05 10:25:27,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 292 flow [2024-02-05 10:25:27,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:25:27,265 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 149 flow [2024-02-05 10:25:27,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-02-05 10:25:27,267 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2024-02-05 10:25:27,267 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 149 flow [2024-02-05 10:25:27,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:27,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:27,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:27,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:25:27,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:27,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:27,268 INFO L85 PathProgramCache]: Analyzing trace with hash 874623008, now seen corresponding path program 1 times [2024-02-05 10:25:27,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:27,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840128306] [2024-02-05 10:25:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:27,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:27,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:27,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840128306] [2024-02-05 10:25:27,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840128306] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:27,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:27,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:25:27,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193984662] [2024-02-05 10:25:27,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:27,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:25:27,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:25:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:25:27,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2024-02-05 10:25:27,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:27,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:27,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2024-02-05 10:25:27,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:27,659 INFO L124 PetriNetUnfolderBase]: 1382/3218 cut-off events. [2024-02-05 10:25:27,659 INFO L125 PetriNetUnfolderBase]: For 184/196 co-relation queries the response was YES. [2024-02-05 10:25:27,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5941 conditions, 3218 events. 1382/3218 cut-off events. For 184/196 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 23190 event pairs, 882 based on Foata normal form. 210/3137 useless extension candidates. Maximal degree in co-relation 5934. Up to 1694 conditions per place. [2024-02-05 10:25:27,674 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 57 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-02-05 10:25:27,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 323 flow [2024-02-05 10:25:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:25:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:25:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-02-05 10:25:27,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101449275362319 [2024-02-05 10:25:27,675 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 149 flow. Second operand 3 states and 147 transitions. [2024-02-05 10:25:27,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 323 flow [2024-02-05 10:25:27,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:25:27,679 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 169 flow [2024-02-05 10:25:27,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2024-02-05 10:25:27,681 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2024-02-05 10:25:27,681 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 169 flow [2024-02-05 10:25:27,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:27,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:27,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:27,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:25:27,682 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:27,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2042549014, now seen corresponding path program 1 times [2024-02-05 10:25:27,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:27,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122155414] [2024-02-05 10:25:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:27,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:27,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:27,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122155414] [2024-02-05 10:25:27,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122155414] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:27,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:27,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:25:27,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967164439] [2024-02-05 10:25:27,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:27,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:25:27,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:27,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:25:27,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:25:27,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-02-05 10:25:27,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2024-02-05 10:25:27,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:27,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-02-05 10:25:27,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:27,959 INFO L124 PetriNetUnfolderBase]: 1013/2417 cut-off events. [2024-02-05 10:25:27,960 INFO L125 PetriNetUnfolderBase]: For 206/232 co-relation queries the response was YES. [2024-02-05 10:25:27,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4808 conditions, 2417 events. 1013/2417 cut-off events. For 206/232 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 16553 event pairs, 159 based on Foata normal form. 22/2335 useless extension candidates. Maximal degree in co-relation 4800. Up to 1291 conditions per place. [2024-02-05 10:25:27,971 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 62 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2024-02-05 10:25:27,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 387 flow [2024-02-05 10:25:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:25:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:25:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-02-05 10:25:27,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-02-05 10:25:27,973 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 169 flow. Second operand 4 states and 195 transitions. [2024-02-05 10:25:27,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 387 flow [2024-02-05 10:25:27,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 379 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-02-05 10:25:27,976 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 187 flow [2024-02-05 10:25:27,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-02-05 10:25:27,976 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2024-02-05 10:25:27,976 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 187 flow [2024-02-05 10:25:27,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2024-02-05 10:25:27,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:27,977 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:27,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:25:27,977 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:27,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:27,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1023015108, now seen corresponding path program 1 times [2024-02-05 10:25:27,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:27,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922743258] [2024-02-05 10:25:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:27,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:28,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:28,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922743258] [2024-02-05 10:25:28,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922743258] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:28,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248121087] [2024-02-05 10:25:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:28,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:28,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:28,083 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) [2024-02-05 10:25:28,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-05 10:25:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:28,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-05 10:25:28,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:28,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:28,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248121087] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:25:28,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:25:28,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-02-05 10:25:28,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044302126] [2024-02-05 10:25:28,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:25:28,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-05 10:25:28,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:28,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-05 10:25:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-05 10:25:28,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 69 [2024-02-05 10:25:28,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 187 flow. Second operand has 8 states, 8 states have (on average 26.75) internal successors, (214), 8 states have internal predecessors, (214), 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) [2024-02-05 10:25:28,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:28,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 69 [2024-02-05 10:25:28,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:29,168 INFO L124 PetriNetUnfolderBase]: 2598/4972 cut-off events. [2024-02-05 10:25:29,169 INFO L125 PetriNetUnfolderBase]: For 1179/1263 co-relation queries the response was YES. [2024-02-05 10:25:29,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10753 conditions, 4972 events. 2598/4972 cut-off events. For 1179/1263 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 29128 event pairs, 111 based on Foata normal form. 648/5405 useless extension candidates. Maximal degree in co-relation 10742. Up to 970 conditions per place. [2024-02-05 10:25:29,195 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 157 selfloop transitions, 6 changer transitions 0/181 dead transitions. [2024-02-05 10:25:29,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 181 transitions, 858 flow [2024-02-05 10:25:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-05 10:25:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-05 10:25:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 324 transitions. [2024-02-05 10:25:29,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2024-02-05 10:25:29,198 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 187 flow. Second operand 7 states and 324 transitions. [2024-02-05 10:25:29,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 181 transitions, 858 flow [2024-02-05 10:25:29,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 181 transitions, 851 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:25:29,204 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 204 flow [2024-02-05 10:25:29,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=204, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2024-02-05 10:25:29,205 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2024-02-05 10:25:29,206 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 204 flow [2024-02-05 10:25:29,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.75) internal successors, (214), 8 states have internal predecessors, (214), 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) [2024-02-05 10:25:29,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:29,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:29,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-05 10:25:29,412 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 [2024-02-05 10:25:29,413 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:29,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1487954029, now seen corresponding path program 1 times [2024-02-05 10:25:29,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:29,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528137233] [2024-02-05 10:25:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:29,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:29,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:29,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528137233] [2024-02-05 10:25:29,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528137233] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:29,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534105618] [2024-02-05 10:25:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:29,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:29,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:29,514 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) [2024-02-05 10:25:29,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-05 10:25:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:29,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-05 10:25:29,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:29,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:29,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534105618] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:25:29,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:25:29,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-02-05 10:25:29,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062969436] [2024-02-05 10:25:29,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:25:29,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-05 10:25:29,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:29,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-05 10:25:29,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-05 10:25:29,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 69 [2024-02-05 10:25:29,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 27.25) internal successors, (218), 8 states have internal predecessors, (218), 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) [2024-02-05 10:25:29,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:29,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 69 [2024-02-05 10:25:29,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:30,961 INFO L124 PetriNetUnfolderBase]: 4586/8199 cut-off events. [2024-02-05 10:25:30,961 INFO L125 PetriNetUnfolderBase]: For 4046/4046 co-relation queries the response was YES. [2024-02-05 10:25:30,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18822 conditions, 8199 events. 4586/8199 cut-off events. For 4046/4046 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 52442 event pairs, 163 based on Foata normal form. 1080/8579 useless extension candidates. Maximal degree in co-relation 18807. Up to 1928 conditions per place. [2024-02-05 10:25:30,996 INFO L140 encePairwiseOnDemand]: 59/69 looper letters, 144 selfloop transitions, 6 changer transitions 0/164 dead transitions. [2024-02-05 10:25:30,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 164 transitions, 906 flow [2024-02-05 10:25:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-05 10:25:30,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-05 10:25:30,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 314 transitions. [2024-02-05 10:25:30,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.650103519668737 [2024-02-05 10:25:30,998 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 204 flow. Second operand 7 states and 314 transitions. [2024-02-05 10:25:30,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 164 transitions, 906 flow [2024-02-05 10:25:31,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 164 transitions, 852 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-02-05 10:25:31,004 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 212 flow [2024-02-05 10:25:31,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2024-02-05 10:25:31,005 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2024-02-05 10:25:31,005 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 212 flow [2024-02-05 10:25:31,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.25) internal successors, (218), 8 states have internal predecessors, (218), 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) [2024-02-05 10:25:31,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:31,006 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, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:31,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-05 10:25:31,218 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 [2024-02-05 10:25:31,219 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:31,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:31,219 INFO L85 PathProgramCache]: Analyzing trace with hash -310289528, now seen corresponding path program 1 times [2024-02-05 10:25:31,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:31,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787056820] [2024-02-05 10:25:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:31,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:31,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:31,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787056820] [2024-02-05 10:25:31,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787056820] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:31,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:31,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:25:31,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374150569] [2024-02-05 10:25:31,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:31,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:25:31,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:31,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:25:31,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:25:31,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 69 [2024-02-05 10:25:31,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 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) [2024-02-05 10:25:31,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:31,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 69 [2024-02-05 10:25:31,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:31,747 INFO L124 PetriNetUnfolderBase]: 1677/4376 cut-off events. [2024-02-05 10:25:31,747 INFO L125 PetriNetUnfolderBase]: For 2955/2955 co-relation queries the response was YES. [2024-02-05 10:25:31,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9975 conditions, 4376 events. 1677/4376 cut-off events. For 2955/2955 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 27887 event pairs, 504 based on Foata normal form. 276/4460 useless extension candidates. Maximal degree in co-relation 9956. Up to 2067 conditions per place. [2024-02-05 10:25:31,784 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 56 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-02-05 10:25:31,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 79 transitions, 440 flow [2024-02-05 10:25:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:25:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:25:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2024-02-05 10:25:31,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7246376811594203 [2024-02-05 10:25:31,786 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 212 flow. Second operand 3 states and 150 transitions. [2024-02-05 10:25:31,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 79 transitions, 440 flow [2024-02-05 10:25:31,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 422 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-02-05 10:25:31,791 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 211 flow [2024-02-05 10:25:31,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2024-02-05 10:25:31,792 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2024-02-05 10:25:31,792 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 211 flow [2024-02-05 10:25:31,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 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) [2024-02-05 10:25:31,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:31,792 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:31,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:25:31,793 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:31,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:31,793 INFO L85 PathProgramCache]: Analyzing trace with hash 210038715, now seen corresponding path program 1 times [2024-02-05 10:25:31,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:31,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27451650] [2024-02-05 10:25:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:31,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:31,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:31,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27451650] [2024-02-05 10:25:31,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27451650] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:31,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400355675] [2024-02-05 10:25:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:31,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:31,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:31,941 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) [2024-02-05 10:25:31,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-05 10:25:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:32,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-05 10:25:32,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:32,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-05 10:25:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:32,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:32,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400355675] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:25:32,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:25:32,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-02-05 10:25:32,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263823008] [2024-02-05 10:25:32,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:25:32,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:25:32,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:32,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:25:32,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:25:32,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-05 10:25:32,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 211 flow. Second operand has 9 states, 9 states have (on average 37.77777777777778) internal successors, (340), 9 states have internal predecessors, (340), 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) [2024-02-05 10:25:32,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:32,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-05 10:25:32,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:33,551 INFO L124 PetriNetUnfolderBase]: 5145/12095 cut-off events. [2024-02-05 10:25:33,551 INFO L125 PetriNetUnfolderBase]: For 9216/9216 co-relation queries the response was YES. [2024-02-05 10:25:33,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30328 conditions, 12095 events. 5145/12095 cut-off events. For 9216/9216 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 96214 event pairs, 999 based on Foata normal form. 114/11925 useless extension candidates. Maximal degree in co-relation 30309. Up to 1977 conditions per place. [2024-02-05 10:25:33,617 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 213 selfloop transitions, 19 changer transitions 0/249 dead transitions. [2024-02-05 10:25:33,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 249 transitions, 1506 flow [2024-02-05 10:25:33,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-05 10:25:33,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-05 10:25:33,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 574 transitions. [2024-02-05 10:25:33,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6932367149758454 [2024-02-05 10:25:33,620 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 211 flow. Second operand 12 states and 574 transitions. [2024-02-05 10:25:33,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 249 transitions, 1506 flow [2024-02-05 10:25:33,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 249 transitions, 1484 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:25:33,645 INFO L231 Difference]: Finished difference. Result has 94 places, 76 transitions, 341 flow [2024-02-05 10:25:33,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=341, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2024-02-05 10:25:33,646 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 27 predicate places. [2024-02-05 10:25:33,647 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 341 flow [2024-02-05 10:25:33,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 37.77777777777778) internal successors, (340), 9 states have internal predecessors, (340), 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) [2024-02-05 10:25:33,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:33,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:33,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-05 10:25:33,860 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 [2024-02-05 10:25:33,860 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:33,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:33,861 INFO L85 PathProgramCache]: Analyzing trace with hash 281684191, now seen corresponding path program 1 times [2024-02-05 10:25:33,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:33,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797336695] [2024-02-05 10:25:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:33,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:34,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:34,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797336695] [2024-02-05 10:25:34,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797336695] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:34,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:34,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-05 10:25:34,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118970796] [2024-02-05 10:25:34,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:34,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-05 10:25:34,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:34,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-05 10:25:34,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-05 10:25:34,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-05 10:25:34,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 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) [2024-02-05 10:25:34,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:34,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-05 10:25:34,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:35,752 INFO L124 PetriNetUnfolderBase]: 4975/11593 cut-off events. [2024-02-05 10:25:35,752 INFO L125 PetriNetUnfolderBase]: For 12048/12048 co-relation queries the response was YES. [2024-02-05 10:25:35,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30710 conditions, 11593 events. 4975/11593 cut-off events. For 12048/12048 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 91210 event pairs, 1692 based on Foata normal form. 16/11357 useless extension candidates. Maximal degree in co-relation 30683. Up to 7372 conditions per place. [2024-02-05 10:25:35,816 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 116 selfloop transitions, 7 changer transitions 0/140 dead transitions. [2024-02-05 10:25:35,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 140 transitions, 865 flow [2024-02-05 10:25:35,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-05 10:25:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-05 10:25:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 315 transitions. [2024-02-05 10:25:35,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-02-05 10:25:35,818 INFO L175 Difference]: Start difference. First operand has 94 places, 76 transitions, 341 flow. Second operand 7 states and 315 transitions. [2024-02-05 10:25:35,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 140 transitions, 865 flow [2024-02-05 10:25:35,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 140 transitions, 851 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-02-05 10:25:35,988 INFO L231 Difference]: Finished difference. Result has 103 places, 81 transitions, 388 flow [2024-02-05 10:25:35,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=103, PETRI_TRANSITIONS=81} [2024-02-05 10:25:35,989 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 36 predicate places. [2024-02-05 10:25:35,993 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 81 transitions, 388 flow [2024-02-05 10:25:35,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 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) [2024-02-05 10:25:35,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:35,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:35,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-05 10:25:35,995 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:35,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:35,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1981637768, now seen corresponding path program 1 times [2024-02-05 10:25:35,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:35,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069299821] [2024-02-05 10:25:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:35,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:36,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:36,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069299821] [2024-02-05 10:25:36,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069299821] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:36,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26856537] [2024-02-05 10:25:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:36,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:36,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:36,589 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) [2024-02-05 10:25:36,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-05 10:25:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:36,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-05 10:25:36,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:36,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-05 10:25:36,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-02-05 10:25:36,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-02-05 10:25:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:36,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:37,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-02-05 10:25:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:37,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26856537] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:25:37,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:25:37,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-02-05 10:25:37,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27594783] [2024-02-05 10:25:37,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:25:37,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-05 10:25:37,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:37,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-05 10:25:37,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-02-05 10:25:37,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-05 10:25:37,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 81 transitions, 388 flow. Second operand has 20 states, 20 states have (on average 36.05) internal successors, (721), 20 states have internal predecessors, (721), 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) [2024-02-05 10:25:37,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:37,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-05 10:25:37,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:42,564 INFO L124 PetriNetUnfolderBase]: 10047/23085 cut-off events. [2024-02-05 10:25:42,565 INFO L125 PetriNetUnfolderBase]: For 27597/27597 co-relation queries the response was YES. [2024-02-05 10:25:42,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63021 conditions, 23085 events. 10047/23085 cut-off events. For 27597/27597 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 204118 event pairs, 1016 based on Foata normal form. 21/22918 useless extension candidates. Maximal degree in co-relation 62989. Up to 3578 conditions per place. [2024-02-05 10:25:42,847 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 678 selfloop transitions, 111 changer transitions 0/806 dead transitions. [2024-02-05 10:25:42,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 806 transitions, 5429 flow [2024-02-05 10:25:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-02-05 10:25:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-02-05 10:25:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 2652 transitions. [2024-02-05 10:25:42,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6100759144237405 [2024-02-05 10:25:42,855 INFO L175 Difference]: Start difference. First operand has 103 places, 81 transitions, 388 flow. Second operand 63 states and 2652 transitions. [2024-02-05 10:25:42,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 806 transitions, 5429 flow [2024-02-05 10:25:42,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 806 transitions, 5426 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:25:42,938 INFO L231 Difference]: Finished difference. Result has 171 places, 187 transitions, 1184 flow [2024-02-05 10:25:42,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1184, PETRI_PLACES=171, PETRI_TRANSITIONS=187} [2024-02-05 10:25:42,939 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 104 predicate places. [2024-02-05 10:25:42,939 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 187 transitions, 1184 flow [2024-02-05 10:25:42,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 36.05) internal successors, (721), 20 states have internal predecessors, (721), 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) [2024-02-05 10:25:42,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:42,940 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:42,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-05 10:25:43,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:43,154 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err7ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:43,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:43,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1999286463, now seen corresponding path program 1 times [2024-02-05 10:25:43,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:43,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032090594] [2024-02-05 10:25:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:43,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-05 10:25:43,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:43,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032090594] [2024-02-05 10:25:43,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032090594] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:43,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:43,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:25:43,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375868276] [2024-02-05 10:25:43,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:43,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-05 10:25:43,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:43,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-05 10:25:43,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-02-05 10:25:43,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-02-05 10:25:43,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 187 transitions, 1184 flow. Second operand has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 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) [2024-02-05 10:25:43,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:43,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-02-05 10:25:43,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:46,904 INFO L124 PetriNetUnfolderBase]: 15209/30419 cut-off events. [2024-02-05 10:25:46,904 INFO L125 PetriNetUnfolderBase]: For 37848/37944 co-relation queries the response was YES. [2024-02-05 10:25:47,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89559 conditions, 30419 events. 15209/30419 cut-off events. For 37848/37944 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 255269 event pairs, 4407 based on Foata normal form. 0/30292 useless extension candidates. Maximal degree in co-relation 89519. Up to 17500 conditions per place. [2024-02-05 10:25:47,233 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 361 selfloop transitions, 8 changer transitions 3/415 dead transitions. [2024-02-05 10:25:47,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 415 transitions, 3343 flow [2024-02-05 10:25:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:25:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:25:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 218 transitions. [2024-02-05 10:25:47,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318840579710145 [2024-02-05 10:25:47,235 INFO L175 Difference]: Start difference. First operand has 171 places, 187 transitions, 1184 flow. Second operand 5 states and 218 transitions. [2024-02-05 10:25:47,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 415 transitions, 3343 flow [2024-02-05 10:25:47,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 415 transitions, 2854 flow, removed 217 selfloop flow, removed 8 redundant places. [2024-02-05 10:25:47,456 INFO L231 Difference]: Finished difference. Result has 167 places, 187 transitions, 977 flow [2024-02-05 10:25:47,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=977, PETRI_PLACES=167, PETRI_TRANSITIONS=187} [2024-02-05 10:25:47,457 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 100 predicate places. [2024-02-05 10:25:47,457 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 187 transitions, 977 flow [2024-02-05 10:25:47,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 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) [2024-02-05 10:25:47,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:47,457 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:47,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-05 10:25:47,457 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:47,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:47,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1176567428, now seen corresponding path program 1 times [2024-02-05 10:25:47,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:47,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139503166] [2024-02-05 10:25:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:47,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-02-05 10:25:47,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:47,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139503166] [2024-02-05 10:25:47,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139503166] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:47,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400095669] [2024-02-05 10:25:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:47,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:47,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:47,702 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) [2024-02-05 10:25:47,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-05 10:25:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:47,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:25:47,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:47,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-05 10:25:47,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-05 10:25:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:48,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-05 10:25:48,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400095669] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:25:48,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:25:48,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 16 [2024-02-05 10:25:48,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202239356] [2024-02-05 10:25:48,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:25:48,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-05 10:25:48,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:48,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-05 10:25:48,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-02-05 10:25:48,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-05 10:25:48,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 187 transitions, 977 flow. Second operand has 16 states, 16 states have (on average 38.0) internal successors, (608), 16 states have internal predecessors, (608), 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) [2024-02-05 10:25:48,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:48,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-05 10:25:48,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:52,300 INFO L124 PetriNetUnfolderBase]: 13089/29855 cut-off events. [2024-02-05 10:25:52,300 INFO L125 PetriNetUnfolderBase]: For 62404/62404 co-relation queries the response was YES. [2024-02-05 10:25:52,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89786 conditions, 29855 events. 13089/29855 cut-off events. For 62404/62404 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 274372 event pairs, 2015 based on Foata normal form. 406/30075 useless extension candidates. Maximal degree in co-relation 89749. Up to 4606 conditions per place. [2024-02-05 10:25:52,642 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 458 selfloop transitions, 100 changer transitions 6/581 dead transitions. [2024-02-05 10:25:52,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 581 transitions, 4341 flow [2024-02-05 10:25:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-05 10:25:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-05 10:25:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1126 transitions. [2024-02-05 10:25:52,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6799516908212561 [2024-02-05 10:25:52,653 INFO L175 Difference]: Start difference. First operand has 167 places, 187 transitions, 977 flow. Second operand 24 states and 1126 transitions. [2024-02-05 10:25:52,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 581 transitions, 4341 flow [2024-02-05 10:25:52,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 581 transitions, 4140 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-02-05 10:25:52,859 INFO L231 Difference]: Finished difference. Result has 189 places, 219 transitions, 1465 flow [2024-02-05 10:25:52,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1465, PETRI_PLACES=189, PETRI_TRANSITIONS=219} [2024-02-05 10:25:52,860 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 122 predicate places. [2024-02-05 10:25:52,861 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 219 transitions, 1465 flow [2024-02-05 10:25:52,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 38.0) internal successors, (608), 16 states have internal predecessors, (608), 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) [2024-02-05 10:25:52,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:52,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:52,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-05 10:25:53,063 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,SelfDestructingSolverStorable13 [2024-02-05 10:25:53,064 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:25:53,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:53,064 INFO L85 PathProgramCache]: Analyzing trace with hash 468090081, now seen corresponding path program 1 times [2024-02-05 10:25:53,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:53,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934452860] [2024-02-05 10:25:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:53,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:53,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:53,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934452860] [2024-02-05 10:25:53,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934452860] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:53,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561841842] [2024-02-05 10:25:53,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:53,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:53,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:53,685 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) [2024-02-05 10:25:53,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-05 10:25:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:53,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-05 10:25:53,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:53,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-05 10:25:53,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 19 [2024-02-05 10:25:54,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2024-02-05 10:25:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:54,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:54,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-05 10:25:54,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2024-02-05 10:25:54,720 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2024-02-05 10:25:54,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 111 [2024-02-05 10:25:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:54,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561841842] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:25:54,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:25:54,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-02-05 10:25:54,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488274202] [2024-02-05 10:25:54,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:25:54,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-05 10:25:54,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:54,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-05 10:25:54,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2024-02-05 10:25:54,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-05 10:25:54,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 219 transitions, 1465 flow. Second operand has 25 states, 25 states have (on average 35.96) internal successors, (899), 25 states have internal predecessors, (899), 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) [2024-02-05 10:25:54,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:54,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-05 10:25:54,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:07,161 INFO L124 PetriNetUnfolderBase]: 25797/58083 cut-off events. [2024-02-05 10:26:07,162 INFO L125 PetriNetUnfolderBase]: For 113479/113479 co-relation queries the response was YES. [2024-02-05 10:26:07,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180301 conditions, 58083 events. 25797/58083 cut-off events. For 113479/113479 co-relation queries the response was YES. Maximal size of possible extension queue 868. Compared 565558 event pairs, 3544 based on Foata normal form. 412/58169 useless extension candidates. Maximal degree in co-relation 180256. Up to 8910 conditions per place. [2024-02-05 10:26:07,759 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 824 selfloop transitions, 340 changer transitions 67/1248 dead transitions. [2024-02-05 10:26:07,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 1248 transitions, 9874 flow [2024-02-05 10:26:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-02-05 10:26:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-02-05 10:26:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 2875 transitions. [2024-02-05 10:26:07,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2024-02-05 10:26:07,763 INFO L175 Difference]: Start difference. First operand has 189 places, 219 transitions, 1465 flow. Second operand 66 states and 2875 transitions. [2024-02-05 10:26:07,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 1248 transitions, 9874 flow [2024-02-05 10:26:08,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 1248 transitions, 9745 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:08,285 INFO L231 Difference]: Finished difference. Result has 276 places, 460 transitions, 4131 flow [2024-02-05 10:26:08,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=4131, PETRI_PLACES=276, PETRI_TRANSITIONS=460} [2024-02-05 10:26:08,286 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 209 predicate places. [2024-02-05 10:26:08,286 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 460 transitions, 4131 flow [2024-02-05 10:26:08,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 35.96) internal successors, (899), 25 states have internal predecessors, (899), 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) [2024-02-05 10:26:08,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:08,286 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:08,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-05 10:26:08,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-05 10:26:08,487 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err8ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:26:08,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:08,487 INFO L85 PathProgramCache]: Analyzing trace with hash -62680113, now seen corresponding path program 1 times [2024-02-05 10:26:08,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:08,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349552083] [2024-02-05 10:26:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:08,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-02-05 10:26:08,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:08,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349552083] [2024-02-05 10:26:08,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349552083] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:08,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:08,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:26:08,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124073135] [2024-02-05 10:26:08,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:08,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-05 10:26:08,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:08,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-05 10:26:08,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-02-05 10:26:08,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2024-02-05 10:26:08,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 460 transitions, 4131 flow. Second operand has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 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) [2024-02-05 10:26:08,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:08,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2024-02-05 10:26:08,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:19,827 INFO L124 PetriNetUnfolderBase]: 31263/61816 cut-off events. [2024-02-05 10:26:19,827 INFO L125 PetriNetUnfolderBase]: For 150231/150495 co-relation queries the response was YES. [2024-02-05 10:26:20,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211220 conditions, 61816 events. 31263/61816 cut-off events. For 150231/150495 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 551385 event pairs, 9373 based on Foata normal form. 0/61150 useless extension candidates. Maximal degree in co-relation 211151. Up to 34969 conditions per place. [2024-02-05 10:26:20,707 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 559 selfloop transitions, 8 changer transitions 2/667 dead transitions. [2024-02-05 10:26:20,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 667 transitions, 7303 flow [2024-02-05 10:26:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:26:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:26:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 213 transitions. [2024-02-05 10:26:20,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6173913043478261 [2024-02-05 10:26:20,708 INFO L175 Difference]: Start difference. First operand has 276 places, 460 transitions, 4131 flow. Second operand 5 states and 213 transitions. [2024-02-05 10:26:20,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 667 transitions, 7303 flow [2024-02-05 10:26:21,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 667 transitions, 7111 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-02-05 10:26:21,693 INFO L231 Difference]: Finished difference. Result has 276 places, 460 transitions, 4050 flow [2024-02-05 10:26:21,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4050, PETRI_PLACES=276, PETRI_TRANSITIONS=460} [2024-02-05 10:26:21,694 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 209 predicate places. [2024-02-05 10:26:21,694 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 460 transitions, 4050 flow [2024-02-05 10:26:21,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 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) [2024-02-05 10:26:21,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:21,695 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:21,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-05 10:26:21,695 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-05 10:26:21,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:21,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1686333226, now seen corresponding path program 2 times [2024-02-05 10:26:21,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:21,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917321166] [2024-02-05 10:26:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:21,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:22,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:22,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917321166] [2024-02-05 10:26:22,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917321166] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:26:22,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809256494] [2024-02-05 10:26:22,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:26:22,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:26:22,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:26:22,019 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) [2024-02-05 10:26:22,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-05 10:26:22,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:26:22,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:26:22,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:26:22,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:26:22,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-05 10:26:22,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-05 10:26:22,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-05 10:26:22,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-05 10:26:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:22,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:26:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:22,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809256494] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:26:22,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:26:22,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-02-05 10:26:22,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868806521] [2024-02-05 10:26:22,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:26:22,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-05 10:26:22,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:22,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-05 10:26:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2024-02-05 10:26:22,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-05 10:26:22,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 460 transitions, 4050 flow. Second operand has 19 states, 19 states have (on average 37.578947368421055) internal successors, (714), 19 states have internal predecessors, (714), 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) [2024-02-05 10:26:22,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:22,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-05 10:26:22,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand