./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.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 59af5db6 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.2023-12-19_14-39-08.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-59af5db-m [2024-02-02 09:11:11,235 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 09:11:11,326 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 09:11:11,331 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 09:11:11,331 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 09:11:11,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 09:11:11,360 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 09:11:11,360 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 09:11:11,361 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 09:11:11,364 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 09:11:11,364 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 09:11:11,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 09:11:11,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 09:11:11,366 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 09:11:11,366 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 09:11:11,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 09:11:11,366 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 09:11:11,367 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 09:11:11,367 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 09:11:11,367 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 09:11:11,367 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 09:11:11,367 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 09:11:11,368 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 09:11:11,368 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 09:11:11,368 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 09:11:11,368 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 09:11:11,369 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 09:11:11,369 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 09:11:11,369 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 09:11:11,370 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 09:11:11,370 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 09:11:11,371 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 09:11:11,371 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:11:11,371 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 09:11:11,371 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 09:11:11,371 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 09:11:11,371 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 09:11:11,372 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 09:11:11,372 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 09:11:11,372 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 09:11:11,372 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 09:11:11,373 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 09:11:11,373 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 09:11:11,373 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 09:11:11,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 09:11:11,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 09:11:11,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 09:11:11,626 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 09:11:11,626 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 09:11:11,627 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2024-02-02 09:11:12,653 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 09:11:12,843 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 09:11:12,844 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2024-02-02 09:11:12,861 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200e4d050/d8f75e9e2f254007b16a82f846fe09ad/FLAGd247d854e [2024-02-02 09:11:12,871 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200e4d050/d8f75e9e2f254007b16a82f846fe09ad [2024-02-02 09:11:12,878 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 09:11:12,878 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 09:11:12,879 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack-1.yml/witness.yml [2024-02-02 09:11:12,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 09:11:12,949 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 09:11:12,950 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 09:11:12,950 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 09:11:12,953 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 09:11:12,954 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:11:12" (1/2) ... [2024-02-02 09:11:12,954 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab43f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:12, skipping insertion in model container [2024-02-02 09:11:12,954 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:11:12" (1/2) ... [2024-02-02 09:11:12,955 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@702c4b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:12, skipping insertion in model container [2024-02-02 09:11:12,956 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:11:12" (2/2) ... [2024-02-02 09:11:12,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab43f3b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:12, skipping insertion in model container [2024-02-02 09:11:12,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:11:12" (2/2) ... [2024-02-02 09:11:12,956 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 09:11:13,000 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 09:11:13,001 INFO L101 nessWitnessExtractor]: Location invariant before [L999-L999] ((unsigned long )arg == 0UL) && ((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || i == 4) [2024-02-02 09:11:13,002 INFO L101 nessWitnessExtractor]: Loop invariant at [L1006-L1015] (unsigned long )arg == 0UL [2024-02-02 09:11:13,002 INFO L101 nessWitnessExtractor]: Location invariant before [L1009-L1013] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 09:11:13,002 INFO L101 nessWitnessExtractor]: Loop invariant at [L992-L1000] (unsigned long )arg == 0UL [2024-02-02 09:11:13,002 INFO L101 nessWitnessExtractor]: Location invariant before [L1014-L1014] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 09:11:13,002 INFO L101 nessWitnessExtractor]: Location invariant before [L1016-L1016] (i == 5) && ((unsigned long )arg == 0UL) [2024-02-02 09:11:13,003 INFO L101 nessWitnessExtractor]: Location invariant before [L1008-L1008] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 09:11:13,003 INFO L101 nessWitnessExtractor]: Location invariant after [L997-L998] ((unsigned long )arg == 0UL) && ((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || i == 4) [2024-02-02 09:11:13,003 INFO L101 nessWitnessExtractor]: Location invariant before [L997-L998] ((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) [2024-02-02 09:11:13,003 INFO L101 nessWitnessExtractor]: Location invariant before [L1001-L1001] (i == 5) && ((unsigned long )arg == 0UL) [2024-02-02 09:11:13,003 INFO L101 nessWitnessExtractor]: Location invariant before [L994-L994] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 09:11:13,003 INFO L101 nessWitnessExtractor]: Location invariant before [L1011-L1012] ((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)) [2024-02-02 09:11:13,003 INFO L101 nessWitnessExtractor]: Location invariant after [L1011-L1012] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 09:11:13,004 INFO L101 nessWitnessExtractor]: Location invariant before [L1022-L1022] flag == (_Bool)0 [2024-02-02 09:11:13,004 INFO L101 nessWitnessExtractor]: Location invariant before [L996-L996] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 09:11:13,004 INFO L101 nessWitnessExtractor]: Location invariant before [L995-L995] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 09:11:13,004 INFO L101 nessWitnessExtractor]: Location invariant before [L1021-L1021] flag == (_Bool)0 [2024-02-02 09:11:13,075 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-02 09:11:13,384 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] [2024-02-02 09:11:13,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:11:13,421 INFO L202 MainTranslator]: Completed pre-run [2024-02-02 09:11:13,454 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 [2024-02-02 09:11:13,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:11:13,587 INFO L206 MainTranslator]: Completed translation [2024-02-02 09:11:13,587 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13 WrapperNode [2024-02-02 09:11:13,588 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 09:11:13,588 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 09:11:13,589 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 09:11:13,589 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 09:11:13,594 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 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,622 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 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,661 INFO L138 Inliner]: procedures = 278, calls = 45, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 179 [2024-02-02 09:11:13,662 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 09:11:13,663 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 09:11:13,663 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 09:11:13,663 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 09:11:13,671 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,689 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,703 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 5, 2, 2, 7]. 39 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 0, 0, 5]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-02-02 09:11:13,704 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,704 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,710 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,714 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,715 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,716 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,719 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 09:11:13,720 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 09:11:13,720 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 09:11:13,720 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 09:11:13,720 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:11:13,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:13,742 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) [2024-02-02 09:11:13,744 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 [2024-02-02 09:11:13,779 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-02 09:11:13,779 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-02 09:11:13,780 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-02 09:11:13,780 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-02 09:11:13,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 09:11:13,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 09:11:13,781 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-02 09:11:13,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-02 09:11:13,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-02 09:11:13,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-02 09:11:13,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-02 09:11:13,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-02 09:11:13,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 09:11:13,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 09:11:13,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 09:11:13,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-02 09:11:13,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-02 09:11:13,783 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-02 09:11:13,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 09:11:13,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 09:11:13,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 09:11:13,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 09:11:13,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-02 09:11:13,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-02 09:11:13,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 09:11:13,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 09:11:13,786 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-02 09:11:13,894 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 09:11:13,895 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 09:11:14,183 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 09:11:14,184 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 09:11:14,323 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 09:11:14,324 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-02 09:11:14,324 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:11:14 BoogieIcfgContainer [2024-02-02 09:11:14,324 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 09:11:14,325 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 09:11:14,325 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 09:11:14,328 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 09:11:14,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 09:11:12" (1/4) ... [2024-02-02 09:11:14,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68857820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:11:14, skipping insertion in model container [2024-02-02 09:11:14,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:11:12" (2/4) ... [2024-02-02 09:11:14,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68857820 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:11:14, skipping insertion in model container [2024-02-02 09:11:14,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (3/4) ... [2024-02-02 09:11:14,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68857820 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:11:14, skipping insertion in model container [2024-02-02 09:11:14,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:11:14" (4/4) ... [2024-02-02 09:11:14,330 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-02-02 09:11:14,342 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 09:11:14,342 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2024-02-02 09:11:14,343 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 09:11:14,419 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-02 09:11:14,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 160 flow [2024-02-02 09:11:14,489 INFO L124 PetriNetUnfolderBase]: 5/71 cut-off events. [2024-02-02 09:11:14,490 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 09:11:14,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 5/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 214 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2024-02-02 09:11:14,493 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 160 flow [2024-02-02 09:11:14,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 147 flow [2024-02-02 09:11:14,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:11:14,519 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;@39f0e634, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:11:14,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2024-02-02 09:11:14,521 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:11:14,522 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 09:11:14,522 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:11:14,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:14,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 09:11:14,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:14,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash 14693, now seen corresponding path program 1 times [2024-02-02 09:11:14,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:14,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102370642] [2024-02-02 09:11:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:14,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:14,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:14,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102370642] [2024-02-02 09:11:14,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102370642] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:14,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:14,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:11:14,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074974443] [2024-02-02 09:11:14,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:14,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:11:14,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:14,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:11:14,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:11:14,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-02-02 09:11:14,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:14,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:14,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-02-02 09:11:14,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:15,150 INFO L124 PetriNetUnfolderBase]: 468/1276 cut-off events. [2024-02-02 09:11:15,151 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-02-02 09:11:15,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2050 conditions, 1276 events. 468/1276 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 8641 event pairs, 357 based on Foata normal form. 48/1021 useless extension candidates. Maximal degree in co-relation 1918. Up to 734 conditions per place. [2024-02-02 09:11:15,184 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 28 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2024-02-02 09:11:15,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 197 flow [2024-02-02 09:11:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:11:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:11:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-02-02 09:11:15,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6712328767123288 [2024-02-02 09:11:15,195 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 147 flow. Second operand 3 states and 147 transitions. [2024-02-02 09:11:15,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 197 flow [2024-02-02 09:11:15,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 65 transitions, 192 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-02 09:11:15,200 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 136 flow [2024-02-02 09:11:15,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-02-02 09:11:15,204 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2024-02-02 09:11:15,204 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 136 flow [2024-02-02 09:11:15,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:15,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:15,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-02 09:11:15,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 09:11:15,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:15,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash 699513165, now seen corresponding path program 1 times [2024-02-02 09:11:15,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:15,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540281726] [2024-02-02 09:11:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:15,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:15,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:15,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540281726] [2024-02-02 09:11:15,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540281726] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:15,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:15,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:15,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022737362] [2024-02-02 09:11:15,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:15,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:15,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:15,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:15,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:15,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-02-02 09:11:15,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 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) [2024-02-02 09:11:15,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:15,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-02-02 09:11:15,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:15,611 INFO L124 PetriNetUnfolderBase]: 383/1012 cut-off events. [2024-02-02 09:11:15,612 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:11:15,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1685 conditions, 1012 events. 383/1012 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6808 event pairs, 9 based on Foata normal form. 44/920 useless extension candidates. Maximal degree in co-relation 1679. Up to 610 conditions per place. [2024-02-02 09:11:15,620 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 39 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-02-02 09:11:15,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 240 flow [2024-02-02 09:11:15,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-02-02 09:11:15,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678082191780822 [2024-02-02 09:11:15,629 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 136 flow. Second operand 4 states and 195 transitions. [2024-02-02 09:11:15,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 240 flow [2024-02-02 09:11:15,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:11:15,631 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 135 flow [2024-02-02 09:11:15,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2024-02-02 09:11:15,633 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2024-02-02 09:11:15,633 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 135 flow [2024-02-02 09:11:15,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 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) [2024-02-02 09:11:15,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:15,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:15,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 09:11:15,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:15,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:15,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2077697808, now seen corresponding path program 1 times [2024-02-02 09:11:15,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:15,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121639510] [2024-02-02 09:11:15,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:15,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:15,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:15,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121639510] [2024-02-02 09:11:15,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121639510] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:15,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:15,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:15,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072135094] [2024-02-02 09:11:15,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:15,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:15,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:15,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:15,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:15,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 73 [2024-02-02 09:11:15,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2024-02-02 09:11:15,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:15,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 73 [2024-02-02 09:11:15,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:16,190 INFO L124 PetriNetUnfolderBase]: 1123/2314 cut-off events. [2024-02-02 09:11:16,191 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-02-02 09:11:16,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4266 conditions, 2314 events. 1123/2314 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 14619 event pairs, 695 based on Foata normal form. 22/1942 useless extension candidates. Maximal degree in co-relation 4260. Up to 1177 conditions per place. [2024-02-02 09:11:16,204 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 72 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2024-02-02 09:11:16,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 359 flow [2024-02-02 09:11:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:16,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2024-02-02 09:11:16,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6506849315068494 [2024-02-02 09:11:16,206 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 135 flow. Second operand 4 states and 190 transitions. [2024-02-02 09:11:16,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 359 flow [2024-02-02 09:11:16,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:16,208 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 158 flow [2024-02-02 09:11:16,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-02-02 09:11:16,209 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2024-02-02 09:11:16,209 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 158 flow [2024-02-02 09:11:16,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2024-02-02 09:11:16,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:16,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:16,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 09:11:16,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:16,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:16,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2078534008, now seen corresponding path program 1 times [2024-02-02 09:11:16,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:16,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774323832] [2024-02-02 09:11:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:16,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:16,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:16,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774323832] [2024-02-02 09:11:16,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774323832] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:16,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:16,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:16,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236104449] [2024-02-02 09:11:16,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:16,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:16,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:16,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:16,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-02-02 09:11:16,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2024-02-02 09:11:16,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:16,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-02-02 09:11:16,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:16,496 INFO L124 PetriNetUnfolderBase]: 705/1650 cut-off events. [2024-02-02 09:11:16,496 INFO L125 PetriNetUnfolderBase]: For 49/69 co-relation queries the response was YES. [2024-02-02 09:11:16,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3085 conditions, 1650 events. 705/1650 cut-off events. For 49/69 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 10698 event pairs, 306 based on Foata normal form. 100/1600 useless extension candidates. Maximal degree in co-relation 3078. Up to 999 conditions per place. [2024-02-02 09:11:16,505 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 55 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2024-02-02 09:11:16,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 343 flow [2024-02-02 09:11:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:16,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 208 transitions. [2024-02-02 09:11:16,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7123287671232876 [2024-02-02 09:11:16,507 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 158 flow. Second operand 4 states and 208 transitions. [2024-02-02 09:11:16,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 343 flow [2024-02-02 09:11:16,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 333 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:16,509 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 154 flow [2024-02-02 09:11:16,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-02-02 09:11:16,510 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2024-02-02 09:11:16,511 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 154 flow [2024-02-02 09:11:16,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2024-02-02 09:11:16,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:16,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:16,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 09:11:16,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:16,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:16,512 INFO L85 PathProgramCache]: Analyzing trace with hash -311372021, now seen corresponding path program 1 times [2024-02-02 09:11:16,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:16,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273370680] [2024-02-02 09:11:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:16,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:16,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:16,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273370680] [2024-02-02 09:11:16,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273370680] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:16,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:16,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:16,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247284695] [2024-02-02 09:11:16,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:16,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:16,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:16,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:16,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:16,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 73 [2024-02-02 09:11:16,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:16,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:16,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 73 [2024-02-02 09:11:16,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:16,911 INFO L124 PetriNetUnfolderBase]: 1821/3712 cut-off events. [2024-02-02 09:11:16,912 INFO L125 PetriNetUnfolderBase]: For 186/270 co-relation queries the response was YES. [2024-02-02 09:11:16,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7200 conditions, 3712 events. 1821/3712 cut-off events. For 186/270 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 24119 event pairs, 1208 based on Foata normal form. 96/3346 useless extension candidates. Maximal degree in co-relation 7193. Up to 1908 conditions per place. [2024-02-02 09:11:16,932 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 78 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2024-02-02 09:11:16,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 102 transitions, 412 flow [2024-02-02 09:11:16,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:16,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-02-02 09:11:16,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6575342465753424 [2024-02-02 09:11:16,934 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 154 flow. Second operand 4 states and 192 transitions. [2024-02-02 09:11:16,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 102 transitions, 412 flow [2024-02-02 09:11:16,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 409 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:16,938 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 175 flow [2024-02-02 09:11:16,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2024-02-02 09:11:16,940 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2024-02-02 09:11:16,940 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 175 flow [2024-02-02 09:11:16,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:16,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:16,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:16,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 09:11:16,941 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:16,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:16,941 INFO L85 PathProgramCache]: Analyzing trace with hash 284823668, now seen corresponding path program 1 times [2024-02-02 09:11:16,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:16,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322390359] [2024-02-02 09:11:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:16,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:17,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:17,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322390359] [2024-02-02 09:11:17,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322390359] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:17,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:17,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:17,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544603341] [2024-02-02 09:11:17,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:17,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:17,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:17,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:17,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 73 [2024-02-02 09:11:17,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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) [2024-02-02 09:11:17,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:17,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 73 [2024-02-02 09:11:17,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:17,270 INFO L124 PetriNetUnfolderBase]: 925/2294 cut-off events. [2024-02-02 09:11:17,271 INFO L125 PetriNetUnfolderBase]: For 166/238 co-relation queries the response was YES. [2024-02-02 09:11:17,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4484 conditions, 2294 events. 925/2294 cut-off events. For 166/238 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 15936 event pairs, 116 based on Foata normal form. 66/2259 useless extension candidates. Maximal degree in co-relation 4476. Up to 1225 conditions per place. [2024-02-02 09:11:17,281 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 58 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2024-02-02 09:11:17,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 379 flow [2024-02-02 09:11:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-02-02 09:11:17,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7363013698630136 [2024-02-02 09:11:17,283 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 175 flow. Second operand 4 states and 215 transitions. [2024-02-02 09:11:17,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 379 flow [2024-02-02 09:11:17,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 92 transitions, 369 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:17,288 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 193 flow [2024-02-02 09:11:17,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2024-02-02 09:11:17,290 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2024-02-02 09:11:17,291 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 193 flow [2024-02-02 09:11:17,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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) [2024-02-02 09:11:17,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:17,291 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:17,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-02 09:11:17,291 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:17,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:17,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1740295158, now seen corresponding path program 1 times [2024-02-02 09:11:17,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:17,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387296612] [2024-02-02 09:11:17,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:17,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:17,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:17,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387296612] [2024-02-02 09:11:17,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387296612] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:17,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837152273] [2024-02-02 09:11:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:17,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:17,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:17,410 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) [2024-02-02 09:11:17,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-02 09:11:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:17,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-02 09:11:17,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:17,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:17,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837152273] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:11:17,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:11:17,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-02-02 09:11:17,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959377461] [2024-02-02 09:11:17,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:11:17,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-02 09:11:17,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:17,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-02 09:11:17,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-02-02 09:11:17,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 73 [2024-02-02 09:11:17,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 193 flow. Second operand has 10 states, 10 states have (on average 29.4) internal successors, (294), 10 states have internal predecessors, (294), 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) [2024-02-02 09:11:17,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:17,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 73 [2024-02-02 09:11:17,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:18,623 INFO L124 PetriNetUnfolderBase]: 2721/5170 cut-off events. [2024-02-02 09:11:18,624 INFO L125 PetriNetUnfolderBase]: For 1187/1351 co-relation queries the response was YES. [2024-02-02 09:11:18,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11169 conditions, 5170 events. 2721/5170 cut-off events. For 1187/1351 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 31288 event pairs, 51 based on Foata normal form. 698/5646 useless extension candidates. Maximal degree in co-relation 11158. Up to 1027 conditions per place. [2024-02-02 09:11:18,665 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 171 selfloop transitions, 7 changer transitions 0/198 dead transitions. [2024-02-02 09:11:18,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 198 transitions, 935 flow [2024-02-02 09:11:18,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-02 09:11:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-02 09:11:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 383 transitions. [2024-02-02 09:11:18,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6558219178082192 [2024-02-02 09:11:18,669 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 193 flow. Second operand 8 states and 383 transitions. [2024-02-02 09:11:18,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 198 transitions, 935 flow [2024-02-02 09:11:18,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 198 transitions, 927 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:11:18,677 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 212 flow [2024-02-02 09:11:18,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=212, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2024-02-02 09:11:18,678 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 8 predicate places. [2024-02-02 09:11:18,678 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 212 flow [2024-02-02 09:11:18,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.4) internal successors, (294), 10 states have internal predecessors, (294), 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) [2024-02-02 09:11:18,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:18,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:18,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-02 09:11:18,893 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 [2024-02-02 09:11:18,893 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:18,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:18,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1221116421, now seen corresponding path program 1 times [2024-02-02 09:11:18,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:18,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349857581] [2024-02-02 09:11:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:18,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:19,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:19,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349857581] [2024-02-02 09:11:19,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349857581] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:19,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016243056] [2024-02-02 09:11:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:19,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:19,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:19,061 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) [2024-02-02 09:11:19,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-02 09:11:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:19,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-02 09:11:19,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:19,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:19,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016243056] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:11:19,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:11:19,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-02-02 09:11:19,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515304861] [2024-02-02 09:11:19,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:11:19,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-02 09:11:19,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:19,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-02 09:11:19,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-02-02 09:11:19,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 73 [2024-02-02 09:11:19,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 212 flow. Second operand has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 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) [2024-02-02 09:11:19,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:19,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 73 [2024-02-02 09:11:19,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:20,615 INFO L124 PetriNetUnfolderBase]: 4891/8705 cut-off events. [2024-02-02 09:11:20,616 INFO L125 PetriNetUnfolderBase]: For 5223/5334 co-relation queries the response was YES. [2024-02-02 09:11:20,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19856 conditions, 8705 events. 4891/8705 cut-off events. For 5223/5334 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 56091 event pairs, 135 based on Foata normal form. 1329/9315 useless extension candidates. Maximal degree in co-relation 19841. Up to 2016 conditions per place. [2024-02-02 09:11:20,660 INFO L140 encePairwiseOnDemand]: 62/73 looper letters, 154 selfloop transitions, 7 changer transitions 0/177 dead transitions. [2024-02-02 09:11:20,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 177 transitions, 982 flow [2024-02-02 09:11:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-02 09:11:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-02 09:11:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 369 transitions. [2024-02-02 09:11:20,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318493150684932 [2024-02-02 09:11:20,662 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 212 flow. Second operand 8 states and 369 transitions. [2024-02-02 09:11:20,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 177 transitions, 982 flow [2024-02-02 09:11:20,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 177 transitions, 917 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-02-02 09:11:20,669 INFO L231 Difference]: Finished difference. Result has 81 places, 60 transitions, 218 flow [2024-02-02 09:11:20,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=218, PETRI_PLACES=81, PETRI_TRANSITIONS=60} [2024-02-02 09:11:20,670 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 10 predicate places. [2024-02-02 09:11:20,670 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 60 transitions, 218 flow [2024-02-02 09:11:20,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 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) [2024-02-02 09:11:20,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:20,671 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] [2024-02-02 09:11:20,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-02 09:11:20,890 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 [2024-02-02 09:11:20,891 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:20,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1224163490, now seen corresponding path program 1 times [2024-02-02 09:11:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:20,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049462739] [2024-02-02 09:11:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:20,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:20,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:20,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049462739] [2024-02-02 09:11:20,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049462739] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:20,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:20,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:20,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105729238] [2024-02-02 09:11:20,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:20,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:11:20,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:20,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:11:20,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:11:20,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 73 [2024-02-02 09:11:20,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 60 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-02-02 09:11:20,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:20,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 73 [2024-02-02 09:11:20,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:21,395 INFO L124 PetriNetUnfolderBase]: 1613/4263 cut-off events. [2024-02-02 09:11:21,395 INFO L125 PetriNetUnfolderBase]: For 4050/4148 co-relation queries the response was YES. [2024-02-02 09:11:21,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9602 conditions, 4263 events. 1613/4263 cut-off events. For 4050/4148 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 26996 event pairs, 429 based on Foata normal form. 398/4475 useless extension candidates. Maximal degree in co-relation 9583. Up to 2028 conditions per place. [2024-02-02 09:11:21,413 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 52 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-02-02 09:11:21,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 430 flow [2024-02-02 09:11:21,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:11:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:11:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2024-02-02 09:11:21,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7488584474885844 [2024-02-02 09:11:21,415 INFO L175 Difference]: Start difference. First operand has 81 places, 60 transitions, 218 flow. Second operand 3 states and 164 transitions. [2024-02-02 09:11:21,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 430 flow [2024-02-02 09:11:21,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 410 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-02-02 09:11:21,420 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 215 flow [2024-02-02 09:11:21,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2024-02-02 09:11:21,421 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2024-02-02 09:11:21,421 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 215 flow [2024-02-02 09:11:21,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-02-02 09:11:21,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:21,422 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, 1] [2024-02-02 09:11:21,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-02 09:11:21,422 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:21,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:21,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1066203401, now seen corresponding path program 1 times [2024-02-02 09:11:21,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:21,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215836110] [2024-02-02 09:11:21,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:21,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:21,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:21,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215836110] [2024-02-02 09:11:21,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215836110] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:21,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100597334] [2024-02-02 09:11:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:21,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:21,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:21,525 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) [2024-02-02 09:11:21,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-02 09:11:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:21,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-02 09:11:21,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:21,653 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 [2024-02-02 09:11:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:21,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:21,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100597334] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:11:21,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:11:21,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-02-02 09:11:21,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540361689] [2024-02-02 09:11:21,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:11:21,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:11:21,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:21,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:11:21,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:11:21,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-02-02 09:11:21,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 215 flow. Second operand has 9 states, 9 states have (on average 43.44444444444444) internal successors, (391), 9 states have internal predecessors, (391), 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) [2024-02-02 09:11:21,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:21,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-02-02 09:11:21,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:23,724 INFO L124 PetriNetUnfolderBase]: 4997/12840 cut-off events. [2024-02-02 09:11:23,724 INFO L125 PetriNetUnfolderBase]: For 12180/12288 co-relation queries the response was YES. [2024-02-02 09:11:23,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30654 conditions, 12840 events. 4997/12840 cut-off events. For 12180/12288 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 109131 event pairs, 995 based on Foata normal form. 222/12757 useless extension candidates. Maximal degree in co-relation 30635. Up to 1911 conditions per place. [2024-02-02 09:11:23,782 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 203 selfloop transitions, 19 changer transitions 0/243 dead transitions. [2024-02-02 09:11:23,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 243 transitions, 1458 flow [2024-02-02 09:11:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-02 09:11:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-02 09:11:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 636 transitions. [2024-02-02 09:11:23,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.726027397260274 [2024-02-02 09:11:23,784 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 215 flow. Second operand 12 states and 636 transitions. [2024-02-02 09:11:23,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 243 transitions, 1458 flow [2024-02-02 09:11:23,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 243 transitions, 1436 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:11:23,810 INFO L231 Difference]: Finished difference. Result has 96 places, 78 transitions, 345 flow [2024-02-02 09:11:23,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=345, PETRI_PLACES=96, PETRI_TRANSITIONS=78} [2024-02-02 09:11:23,811 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 25 predicate places. [2024-02-02 09:11:23,811 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 78 transitions, 345 flow [2024-02-02 09:11:23,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 43.44444444444444) internal successors, (391), 9 states have internal predecessors, (391), 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) [2024-02-02 09:11:23,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:23,812 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] [2024-02-02 09:11:23,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-02 09:11:24,023 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 [2024-02-02 09:11:24,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:24,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1867355027, now seen corresponding path program 1 times [2024-02-02 09:11:24,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:24,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364036162] [2024-02-02 09:11:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:24,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:24,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:24,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364036162] [2024-02-02 09:11:24,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364036162] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:24,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:24,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-02 09:11:24,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895117058] [2024-02-02 09:11:24,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:24,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-02 09:11:24,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:24,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-02 09:11:24,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-02 09:11:24,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-02-02 09:11:24,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 78 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 40.57142857142857) internal successors, (284), 7 states have internal predecessors, (284), 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) [2024-02-02 09:11:24,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:24,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-02-02 09:11:24,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:25,924 INFO L124 PetriNetUnfolderBase]: 4837/12258 cut-off events. [2024-02-02 09:11:25,924 INFO L125 PetriNetUnfolderBase]: For 15224/15332 co-relation queries the response was YES. [2024-02-02 09:11:25,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30932 conditions, 12258 events. 4837/12258 cut-off events. For 15224/15332 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 102634 event pairs, 1655 based on Foata normal form. 124/12093 useless extension candidates. Maximal degree in co-relation 30905. Up to 7309 conditions per place. [2024-02-02 09:11:26,005 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 111 selfloop transitions, 7 changer transitions 0/139 dead transitions. [2024-02-02 09:11:26,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 139 transitions, 847 flow [2024-02-02 09:11:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 09:11:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 09:11:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 352 transitions. [2024-02-02 09:11:26,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888454011741683 [2024-02-02 09:11:26,007 INFO L175 Difference]: Start difference. First operand has 96 places, 78 transitions, 345 flow. Second operand 7 states and 352 transitions. [2024-02-02 09:11:26,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 139 transitions, 847 flow [2024-02-02 09:11:26,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 139 transitions, 833 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-02-02 09:11:26,032 INFO L231 Difference]: Finished difference. Result has 105 places, 83 transitions, 392 flow [2024-02-02 09:11:26,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=392, PETRI_PLACES=105, PETRI_TRANSITIONS=83} [2024-02-02 09:11:26,033 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 34 predicate places. [2024-02-02 09:11:26,033 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 83 transitions, 392 flow [2024-02-02 09:11:26,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.57142857142857) internal successors, (284), 7 states have internal predecessors, (284), 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) [2024-02-02 09:11:26,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:26,034 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1] [2024-02-02 09:11:26,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-02 09:11:26,034 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:26,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:26,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1880210762, now seen corresponding path program 1 times [2024-02-02 09:11:26,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:26,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371379519] [2024-02-02 09:11:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:26,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:26,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371379519] [2024-02-02 09:11:26,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371379519] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:26,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716323877] [2024-02-02 09:11:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:26,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:26,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:26,667 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) [2024-02-02 09:11:26,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-02 09:11:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:26,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-02 09:11:26,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:26,822 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 [2024-02-02 09:11:26,906 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 [2024-02-02 09:11:27,009 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 [2024-02-02 09:11:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:27,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:27,422 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 [2024-02-02 09:11:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:27,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716323877] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:11:27,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:11:27,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-02-02 09:11:27,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484295883] [2024-02-02 09:11:27,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:11:27,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-02 09:11:27,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:27,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-02 09:11:27,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-02-02 09:11:27,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-02-02 09:11:27,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 83 transitions, 392 flow. Second operand has 20 states, 20 states have (on average 41.75) internal successors, (835), 20 states have internal predecessors, (835), 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) [2024-02-02 09:11:27,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:27,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-02-02 09:11:27,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:33,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-02 09:11:37,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-02-02 09:11:41,939 INFO L124 PetriNetUnfolderBase]: 9835/24234 cut-off events. [2024-02-02 09:11:41,939 INFO L125 PetriNetUnfolderBase]: For 32698/32846 co-relation queries the response was YES. [2024-02-02 09:11:42,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63521 conditions, 24234 events. 9835/24234 cut-off events. For 32698/32846 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 226165 event pairs, 1099 based on Foata normal form. 169/24162 useless extension candidates. Maximal degree in co-relation 63489. Up to 3520 conditions per place. [2024-02-02 09:11:42,105 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 664 selfloop transitions, 111 changer transitions 0/796 dead transitions. [2024-02-02 09:11:42,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 796 transitions, 5357 flow [2024-02-02 09:11:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-02-02 09:11:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-02-02 09:11:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3016 transitions. [2024-02-02 09:11:42,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557947379865188 [2024-02-02 09:11:42,111 INFO L175 Difference]: Start difference. First operand has 105 places, 83 transitions, 392 flow. Second operand 63 states and 3016 transitions. [2024-02-02 09:11:42,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 796 transitions, 5357 flow [2024-02-02 09:11:42,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 796 transitions, 5354 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:11:42,186 INFO L231 Difference]: Finished difference. Result has 173 places, 189 transitions, 1188 flow [2024-02-02 09:11:42,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1188, PETRI_PLACES=173, PETRI_TRANSITIONS=189} [2024-02-02 09:11:42,187 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 102 predicate places. [2024-02-02 09:11:42,187 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 189 transitions, 1188 flow [2024-02-02 09:11:42,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 41.75) internal successors, (835), 20 states have internal predecessors, (835), 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) [2024-02-02 09:11:42,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:42,187 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:42,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-02 09:11:42,400 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 [2024-02-02 09:11:42,401 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err8ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:42,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:42,401 INFO L85 PathProgramCache]: Analyzing trace with hash -27529128, now seen corresponding path program 1 times [2024-02-02 09:11:42,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:42,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058849030] [2024-02-02 09:11:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:42,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-02-02 09:11:42,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:42,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058849030] [2024-02-02 09:11:42,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058849030] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:42,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:42,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:11:42,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006727109] [2024-02-02 09:11:42,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:42,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-02 09:11:42,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:42,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-02 09:11:42,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-02-02 09:11:42,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 73 [2024-02-02 09:11:42,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 189 transitions, 1188 flow. Second operand has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 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) [2024-02-02 09:11:42,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:42,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 73 [2024-02-02 09:11:42,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:47,777 INFO L124 PetriNetUnfolderBase]: 18190/36711 cut-off events. [2024-02-02 09:11:47,777 INFO L125 PetriNetUnfolderBase]: For 50807/50977 co-relation queries the response was YES. [2024-02-02 09:11:47,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104373 conditions, 36711 events. 18190/36711 cut-off events. For 50807/50977 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 319730 event pairs, 4505 based on Foata normal form. 74/36518 useless extension candidates. Maximal degree in co-relation 104333. Up to 17498 conditions per place. [2024-02-02 09:11:48,109 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 396 selfloop transitions, 9 changer transitions 3/453 dead transitions. [2024-02-02 09:11:48,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 453 transitions, 3636 flow [2024-02-02 09:11:48,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-02 09:11:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-02 09:11:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 274 transitions. [2024-02-02 09:11:48,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6255707762557078 [2024-02-02 09:11:48,110 INFO L175 Difference]: Start difference. First operand has 173 places, 189 transitions, 1188 flow. Second operand 6 states and 274 transitions. [2024-02-02 09:11:48,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 453 transitions, 3636 flow [2024-02-02 09:11:48,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 453 transitions, 3112 flow, removed 230 selfloop flow, removed 8 redundant places. [2024-02-02 09:11:48,316 INFO L231 Difference]: Finished difference. Result has 169 places, 189 transitions, 974 flow [2024-02-02 09:11:48,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=974, PETRI_PLACES=169, PETRI_TRANSITIONS=189} [2024-02-02 09:11:48,317 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 98 predicate places. [2024-02-02 09:11:48,318 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 189 transitions, 974 flow [2024-02-02 09:11:48,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.333333333333336) internal successors, (206), 6 states have internal predecessors, (206), 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) [2024-02-02 09:11:48,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:48,318 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2024-02-02 09:11:48,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-02 09:11:48,318 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:48,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:48,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1651264677, now seen corresponding path program 1 times [2024-02-02 09:11:48,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:48,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31656095] [2024-02-02 09:11:48,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:48,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-02-02 09:11:48,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:48,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31656095] [2024-02-02 09:11:48,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31656095] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:48,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327677185] [2024-02-02 09:11:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:48,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:48,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:48,729 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) [2024-02-02 09:11:48,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-02 09:11:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:48,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-02 09:11:48,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:48,927 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 [2024-02-02 09:11:48,984 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 [2024-02-02 09:11:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:49,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-02 09:11:49,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327677185] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:11:49,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:11:49,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 16 [2024-02-02 09:11:49,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188250609] [2024-02-02 09:11:49,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:11:49,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-02 09:11:49,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:49,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-02 09:11:49,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-02-02 09:11:49,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-02-02 09:11:49,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 189 transitions, 974 flow. Second operand has 16 states, 16 states have (on average 43.625) internal successors, (698), 16 states have internal predecessors, (698), 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) [2024-02-02 09:11:49,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:49,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-02-02 09:11:49,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:54,781 INFO L124 PetriNetUnfolderBase]: 12885/31694 cut-off events. [2024-02-02 09:11:54,782 INFO L125 PetriNetUnfolderBase]: For 61760/61800 co-relation queries the response was YES. [2024-02-02 09:11:54,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88989 conditions, 31694 events. 12885/31694 cut-off events. For 61760/61800 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 309160 event pairs, 1939 based on Foata normal form. 446/31931 useless extension candidates. Maximal degree in co-relation 88953. Up to 4542 conditions per place. [2024-02-02 09:11:54,994 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 448 selfloop transitions, 100 changer transitions 6/575 dead transitions. [2024-02-02 09:11:54,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 575 transitions, 4170 flow [2024-02-02 09:11:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-02 09:11:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-02 09:11:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1260 transitions. [2024-02-02 09:11:54,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7191780821917808 [2024-02-02 09:11:54,997 INFO L175 Difference]: Start difference. First operand has 169 places, 189 transitions, 974 flow. Second operand 24 states and 1260 transitions. [2024-02-02 09:11:54,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 575 transitions, 4170 flow [2024-02-02 09:11:55,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 575 transitions, 3991 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-02-02 09:11:55,180 INFO L231 Difference]: Finished difference. Result has 191 places, 221 transitions, 1460 flow [2024-02-02 09:11:55,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1460, PETRI_PLACES=191, PETRI_TRANSITIONS=221} [2024-02-02 09:11:55,181 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 120 predicate places. [2024-02-02 09:11:55,181 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 221 transitions, 1460 flow [2024-02-02 09:11:55,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 43.625) internal successors, (698), 16 states have internal predecessors, (698), 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) [2024-02-02 09:11:55,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:55,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1] [2024-02-02 09:11:55,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-02 09:11:55,395 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 [2024-02-02 09:11:55,395 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:11:55,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:55,396 INFO L85 PathProgramCache]: Analyzing trace with hash 745957698, now seen corresponding path program 1 times [2024-02-02 09:11:55,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:55,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137204684] [2024-02-02 09:11:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:55,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:56,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:56,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137204684] [2024-02-02 09:11:56,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137204684] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:56,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003306354] [2024-02-02 09:11:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:56,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:56,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:56,220 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) [2024-02-02 09:11:56,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-02 09:11:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:56,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-02 09:11:56,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:56,381 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 [2024-02-02 09:11:56,498 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 [2024-02-02 09:11:56,708 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 [2024-02-02 09:11:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:56,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:57,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-02 09:11:57,233 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 [2024-02-02 09:11:57,294 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2024-02-02 09:11:57,295 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 [2024-02-02 09:11:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:57,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003306354] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:11:57,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:11:57,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-02-02 09:11:57,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484553608] [2024-02-02 09:11:57,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:11:57,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-02 09:11:57,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:57,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-02 09:11:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2024-02-02 09:11:57,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-02-02 09:11:57,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 221 transitions, 1460 flow. Second operand has 25 states, 25 states have (on average 41.72) internal successors, (1043), 25 states have internal predecessors, (1043), 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) [2024-02-02 09:11:57,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:57,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-02-02 09:11:57,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:12:11,394 INFO L124 PetriNetUnfolderBase]: 25585/61768 cut-off events. [2024-02-02 09:12:11,394 INFO L125 PetriNetUnfolderBase]: For 116847/116887 co-relation queries the response was YES. [2024-02-02 09:12:12,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179521 conditions, 61768 events. 25585/61768 cut-off events. For 116847/116887 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 638492 event pairs, 3503 based on Foata normal form. 452/61836 useless extension candidates. Maximal degree in co-relation 179477. Up to 8842 conditions per place. [2024-02-02 09:12:12,290 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 812 selfloop transitions, 340 changer transitions 67/1240 dead transitions. [2024-02-02 09:12:12,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 1240 transitions, 9589 flow [2024-02-02 09:12:12,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-02-02 09:12:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-02-02 09:12:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3259 transitions. [2024-02-02 09:12:12,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764217517642175 [2024-02-02 09:12:12,296 INFO L175 Difference]: Start difference. First operand has 191 places, 221 transitions, 1460 flow. Second operand 66 states and 3259 transitions. [2024-02-02 09:12:12,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 1240 transitions, 9589 flow [2024-02-02 09:12:12,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1240 transitions, 9460 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-02-02 09:12:12,979 INFO L231 Difference]: Finished difference. Result has 278 places, 462 transitions, 4126 flow [2024-02-02 09:12:12,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=4126, PETRI_PLACES=278, PETRI_TRANSITIONS=462} [2024-02-02 09:12:12,980 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 207 predicate places. [2024-02-02 09:12:12,980 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 462 transitions, 4126 flow [2024-02-02 09:12:12,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 41.72) internal successors, (1043), 25 states have internal predecessors, (1043), 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) [2024-02-02 09:12:12,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:12:12,981 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:12:12,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-02 09:12:13,183 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 [2024-02-02 09:12:13,184 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err9ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 39 more)] === [2024-02-02 09:12:13,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:12:13,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1759128367, now seen corresponding path program 1 times [2024-02-02 09:12:13,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:12:13,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349911670] [2024-02-02 09:12:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:12:13,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:12:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:12:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-02-02 09:12:13,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:12:13,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349911670] [2024-02-02 09:12:13,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349911670] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:12:13,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:12:13,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:12:13,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785129793] [2024-02-02 09:12:13,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:12:13,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-02 09:12:13,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:12:13,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-02 09:12:13,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-02-02 09:12:13,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 73 [2024-02-02 09:12:13,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 462 transitions, 4126 flow. Second operand has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 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) [2024-02-02 09:12:13,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:12:13,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 73 [2024-02-02 09:12:13,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand