./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-2.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_longer-2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fced0e87 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_longer-2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longer-2.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-wip.fs.extract-columns-fced0e8-m [2024-01-31 16:00:51,404 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:00:51,472 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:00:51,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:00:51,479 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:00:51,497 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:00:51,497 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:00:51,498 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:00:51,498 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:00:51,498 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:00:51,498 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:00:51,499 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:00:51,499 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:00:51,499 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:00:51,500 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:00:51,502 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:00:51,503 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:00:51,505 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:00:51,505 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:00:51,506 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:00:51,507 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:00:51,507 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:00:51,507 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:00:51,507 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:00:51,508 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:00:51,508 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:00:51,508 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:00:51,508 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:00:51,509 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:00:51,509 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:00:51,510 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:00:51,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:00:51,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:00:51,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:00:51,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:00:51,511 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:00:51,511 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:00:51,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:00:51,512 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:00:51,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:00:51,512 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:00:51,512 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:00:51,512 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:00:51,513 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:00:51,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:00:51,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:00:51,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:00:51,819 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:00:51,819 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:00:51,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2024-01-31 16:00:52,843 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:00:53,083 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:00:53,084 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2024-01-31 16:00:53,098 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba8ed24c1/4fc17a44bacb4db1ba744516c06ae1f8/FLAG100e6c81b [2024-01-31 16:00:53,112 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba8ed24c1/4fc17a44bacb4db1ba744516c06ae1f8 [2024-01-31 16:00:53,114 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:00:53,114 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:00:53,117 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longer-2.yml/witness.yml [2024-01-31 16:00:53,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:00:53,198 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:00:53,200 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:00:53,200 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:00:53,204 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:00:53,205 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:00:53" (1/2) ... [2024-01-31 16:00:53,207 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4535fb69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:53, skipping insertion in model container [2024-01-31 16:00:53,207 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:00:53" (1/2) ... [2024-01-31 16:00:53,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@752fcc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:53, skipping insertion in model container [2024-01-31 16:00:53,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:00:53" (2/2) ... [2024-01-31 16:00:53,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4535fb69 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53, skipping insertion in model container [2024-01-31 16:00:53,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:00:53" (2/2) ... [2024-01-31 16:00:53,211 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:00:53,281 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:00:53,282 INFO L98 nessWitnessExtractor]: Location invariant before [L1008-L1008] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-31 16:00:53,282 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L996] ((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)) || (5 <= i && i <= 399)) || (5 <= i && i <= 399)) || i == 4) [2024-01-31 16:00:53,282 INFO L98 nessWitnessExtractor]: Location invariant before [L1020-L1020] flag == (_Bool)0 [2024-01-31 16:00:53,283 INFO L98 nessWitnessExtractor]: Location invariant before [L1015-L1015] (i == 400) && ((unsigned long )arg == 0UL) [2024-01-31 16:00:53,283 INFO L98 nessWitnessExtractor]: Location invariant before [L993-L993] ((unsigned long )arg == 0UL) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 399)) [2024-01-31 16:00:53,283 INFO L98 nessWitnessExtractor]: Location invariant before [L1000-L1000] (i == 400) && ((unsigned long )arg == 0UL) [2024-01-31 16:00:53,284 INFO L98 nessWitnessExtractor]: Location invariant before [L995-L995] ((unsigned long )arg == 0UL) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 399)) [2024-01-31 16:00:53,284 INFO L98 nessWitnessExtractor]: Location invariant before [L1013-L1013] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-31 16:00:53,284 INFO L98 nessWitnessExtractor]: Location invariant before [L1011-L1011] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-31 16:00:53,284 INFO L98 nessWitnessExtractor]: Location invariant before [L994-L994] ((unsigned long )arg == 0UL) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 399)) [2024-01-31 16:00:53,284 INFO L98 nessWitnessExtractor]: Location invariant before [L1007-L1007] ((unsigned long )arg == 0UL) && ((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-31 16:00:53,285 INFO L98 nessWitnessExtractor]: Loop invariant at [L1005-L1005] (unsigned long )arg == 0UL [2024-01-31 16:00:53,285 INFO L98 nessWitnessExtractor]: Location invariant before [L998-L998] ((unsigned long )arg == 0UL) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 399)) || i == 4) [2024-01-31 16:00:53,285 INFO L98 nessWitnessExtractor]: Location invariant before [L1021-L1021] flag == (_Bool)0 [2024-01-31 16:00:53,285 INFO L98 nessWitnessExtractor]: Loop invariant at [L991-L991] (unsigned long )arg == 0UL [2024-01-31 16:00:53,285 INFO L98 nessWitnessExtractor]: Location invariant before [L1010-L1010] ((unsigned long )arg == 0UL) && ((((((((((((((((i == 5 || i == 4) || i == 4) || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || (8 <= i && i <= 399)) || (0 == i && i == 0)) || i == 7) || i == 7) || i == 6) || i == 6) [2024-01-31 16:00:53,285 INFO L98 nessWitnessExtractor]: Location invariant before [L997-L997] ((unsigned long )arg == 0UL) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 399)) || i == 4) [2024-01-31 16:00:53,328 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:00:53,659 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_longer-2.i[41529,41542] [2024-01-31 16:00:53,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:00:53,685 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:00:53,717 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_longer-2.i[41529,41542] 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 [2024-01-31 16:00:53,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:00:53,824 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:00:53,824 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53 WrapperNode [2024-01-31 16:00:53,824 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:00:53,825 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:00:53,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:00:53,825 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:00:53,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (1/1) ... [2024-01-31 16:00:53,844 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (1/1) ... [2024-01-31 16:00:53,940 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 173 [2024-01-31 16:00:53,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:00:53,941 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:00:53,941 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:00:53,943 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:00:53,952 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (1/1) ... [2024-01-31 16:00:53,952 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (1/1) ... [2024-01-31 16:00:53,956 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (1/1) ... [2024-01-31 16:00:53,976 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 3, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 0, 5, 0]. The 4 writes are split as follows [0, 1, 2, 0, 1]. [2024-01-31 16:00:53,981 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (1/1) ... [2024-01-31 16:00:53,985 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (1/1) ... [2024-01-31 16:00:53,993 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (1/1) ... [2024-01-31 16:00:53,996 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (1/1) ... [2024-01-31 16:00:53,998 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (1/1) ... [2024-01-31 16:00:53,999 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (1/1) ... [2024-01-31 16:00:54,002 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:00:54,002 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:00:54,002 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:00:54,003 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:00:54,003 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (1/1) ... [2024-01-31 16:00:54,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:00:54,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:00:54,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:00:54,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:00:54,081 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 16:00:54,081 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 16:00:54,082 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 16:00:54,082 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 16:00:54,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:00:54,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:00:54,083 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:00:54,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:00:54,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:00:54,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:00:54,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:00:54,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 16:00:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:00:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:00:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:00:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:00:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 16:00:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:00:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:00:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:00:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:00:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:00:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:00:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 16:00:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:00:54,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:00:54,087 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:00:54,232 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:00:54,233 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:00:54,581 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:00:54,581 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:00:54,740 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:00:54,741 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:00:54,743 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:00:54 BoogieIcfgContainer [2024-01-31 16:00:54,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:00:54,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:00:54,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:00:54,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:00:54,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:00:53" (1/4) ... [2024-01-31 16:00:54,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74db0fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:00:54, skipping insertion in model container [2024-01-31 16:00:54,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:00:53" (2/4) ... [2024-01-31 16:00:54,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74db0fd9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:00:54, skipping insertion in model container [2024-01-31 16:00:54,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:53" (3/4) ... [2024-01-31 16:00:54,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74db0fd9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:00:54, skipping insertion in model container [2024-01-31 16:00:54,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:00:54" (4/4) ... [2024-01-31 16:00:54,751 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2024-01-31 16:00:54,765 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:00:54,765 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-01-31 16:00:54,765 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:00:54,836 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:00:54,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 69 transitions, 152 flow [2024-01-31 16:00:54,903 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2024-01-31 16:00:54,903 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:00:54,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 191 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2024-01-31 16:00:54,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 69 transitions, 152 flow [2024-01-31 16:00:54,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 139 flow [2024-01-31 16:00:54,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:00:54,925 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;@2592f59a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:00:54,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-01-31 16:00:54,928 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:00:54,928 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:00:54,928 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:00:54,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:54,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:00:54,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:00:54,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:54,933 INFO L85 PathProgramCache]: Analyzing trace with hash 14238, now seen corresponding path program 1 times [2024-01-31 16:00:54,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:54,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339860535] [2024-01-31 16:00:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:54,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:55,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:55,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339860535] [2024-01-31 16:00:55,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339860535] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:55,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:55,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:00:55,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030763161] [2024-01-31 16:00:55,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:55,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:00:55,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:55,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:00:55,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:00:55,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-01-31 16:00:55,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:55,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:55,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-01-31 16:00:55,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:55,466 INFO L124 PetriNetUnfolderBase]: 411/1077 cut-off events. [2024-01-31 16:00:55,467 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-01-31 16:00:55,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 1077 events. 411/1077 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6923 event pairs, 337 based on Foata normal form. 48/919 useless extension candidates. Maximal degree in co-relation 1685. Up to 686 conditions per place. [2024-01-31 16:00:55,478 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 30 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2024-01-31 16:00:55,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 193 flow [2024-01-31 16:00:55,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:00:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:00:55,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-01-31 16:00:55,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6328502415458938 [2024-01-31 16:00:55,491 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 139 flow. Second operand 3 states and 131 transitions. [2024-01-31 16:00:55,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 193 flow [2024-01-31 16:00:55,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 16:00:55,499 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 128 flow [2024-01-31 16:00:55,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-01-31 16:00:55,504 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2024-01-31 16:00:55,504 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 128 flow [2024-01-31 16:00:55,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:55,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:55,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:00:55,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:00:55,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:00:55,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash 277773959, now seen corresponding path program 1 times [2024-01-31 16:00:55,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:55,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986975249] [2024-01-31 16:00:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:55,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:55,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:55,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986975249] [2024-01-31 16:00:55,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986975249] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:55,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:55,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:00:55,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359872077] [2024-01-31 16:00:55,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:55,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:00:55,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:55,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:00:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:00:55,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-01-31 16:00:55,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:55,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:55,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-01-31 16:00:55,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:55,872 INFO L124 PetriNetUnfolderBase]: 428/1052 cut-off events. [2024-01-31 16:00:55,872 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:00:55,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794 conditions, 1052 events. 428/1052 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6687 event pairs, 30 based on Foata normal form. 0/896 useless extension candidates. Maximal degree in co-relation 1788. Up to 678 conditions per place. [2024-01-31 16:00:55,878 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 42 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-01-31 16:00:55,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 242 flow [2024-01-31 16:00:55,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:00:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:00:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-01-31 16:00:55,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-01-31 16:00:55,884 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 128 flow. Second operand 4 states and 177 transitions. [2024-01-31 16:00:55,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 242 flow [2024-01-31 16:00:55,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 73 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:00:55,887 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 129 flow [2024-01-31 16:00:55,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-01-31 16:00:55,888 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2024-01-31 16:00:55,888 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 129 flow [2024-01-31 16:00:55,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:55,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:55,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:55,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:00:55,889 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:00:55,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:55,891 INFO L85 PathProgramCache]: Analyzing trace with hash 652839743, now seen corresponding path program 1 times [2024-01-31 16:00:55,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:55,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052984003] [2024-01-31 16:00:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:55,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:55,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:55,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052984003] [2024-01-31 16:00:55,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052984003] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:55,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:55,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:00:55,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250157775] [2024-01-31 16:00:55,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:55,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:00:55,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:55,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:00:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:00:56,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-01-31 16:00:56,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:56,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:56,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-01-31 16:00:56,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:56,185 INFO L124 PetriNetUnfolderBase]: 393/1070 cut-off events. [2024-01-31 16:00:56,185 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-01-31 16:00:56,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1774 conditions, 1070 events. 393/1070 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7025 event pairs, 11 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 1768. Up to 564 conditions per place. [2024-01-31 16:00:56,191 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 56 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-01-31 16:00:56,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 302 flow [2024-01-31 16:00:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:00:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:00:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-01-31 16:00:56,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6920289855072463 [2024-01-31 16:00:56,193 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 129 flow. Second operand 4 states and 191 transitions. [2024-01-31 16:00:56,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 302 flow [2024-01-31 16:00:56,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:00:56,196 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 128 flow [2024-01-31 16:00:56,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-01-31 16:00:56,197 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2024-01-31 16:00:56,197 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 128 flow [2024-01-31 16:00:56,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:56,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:56,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:56,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:00:56,198 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:00:56,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:56,199 INFO L85 PathProgramCache]: Analyzing trace with hash 652817834, now seen corresponding path program 1 times [2024-01-31 16:00:56,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:56,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105037876] [2024-01-31 16:00:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:56,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:56,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:56,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105037876] [2024-01-31 16:00:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105037876] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:56,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:56,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:00:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259323876] [2024-01-31 16:00:56,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:56,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:00:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:56,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:00:56,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:00:56,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-01-31 16:00:56,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:56,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:56,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-01-31 16:00:56,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:56,502 INFO L124 PetriNetUnfolderBase]: 882/1932 cut-off events. [2024-01-31 16:00:56,502 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-01-31 16:00:56,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3552 conditions, 1932 events. 882/1932 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 12138 event pairs, 526 based on Foata normal form. 88/1721 useless extension candidates. Maximal degree in co-relation 3546. Up to 1018 conditions per place. [2024-01-31 16:00:56,513 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 56 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-01-31 16:00:56,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 292 flow [2024-01-31 16:00:56,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:00:56,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:00:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2024-01-31 16:00:56,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7053140096618358 [2024-01-31 16:00:56,515 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 128 flow. Second operand 3 states and 146 transitions. [2024-01-31 16:00:56,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 292 flow [2024-01-31 16:00:56,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:00:56,518 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 149 flow [2024-01-31 16:00:56,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-01-31 16:00:56,520 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2024-01-31 16:00:56,520 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 149 flow [2024-01-31 16:00:56,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:56,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:56,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:56,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:00:56,521 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:00:56,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:56,522 INFO L85 PathProgramCache]: Analyzing trace with hash 313784258, now seen corresponding path program 1 times [2024-01-31 16:00:56,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:56,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983885744] [2024-01-31 16:00:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:56,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:56,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:56,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983885744] [2024-01-31 16:00:56,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983885744] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:56,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:56,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:00:56,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863448997] [2024-01-31 16:00:56,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:56,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:00:56,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:56,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:00:56,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:00:56,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2024-01-31 16:00:56,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:56,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:56,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2024-01-31 16:00:56,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:56,898 INFO L124 PetriNetUnfolderBase]: 1382/3218 cut-off events. [2024-01-31 16:00:56,898 INFO L125 PetriNetUnfolderBase]: For 184/196 co-relation queries the response was YES. [2024-01-31 16:00:56,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5941 conditions, 3218 events. 1382/3218 cut-off events. For 184/196 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 23238 event pairs, 882 based on Foata normal form. 210/3137 useless extension candidates. Maximal degree in co-relation 5934. Up to 1694 conditions per place. [2024-01-31 16:00:56,916 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 57 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-01-31 16:00:56,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 323 flow [2024-01-31 16:00:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:00:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:00:56,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-01-31 16:00:56,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101449275362319 [2024-01-31 16:00:56,918 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 149 flow. Second operand 3 states and 147 transitions. [2024-01-31 16:00:56,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 323 flow [2024-01-31 16:00:56,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:00:56,920 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 169 flow [2024-01-31 16:00:56,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2024-01-31 16:00:56,921 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2024-01-31 16:00:56,921 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 169 flow [2024-01-31 16:00:56,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:56,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:56,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:56,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:00:56,922 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:00:56,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:56,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1509423826, now seen corresponding path program 1 times [2024-01-31 16:00:56,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:56,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127748582] [2024-01-31 16:00:56,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:56,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:57,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:57,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127748582] [2024-01-31 16:00:57,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127748582] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:57,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:57,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:00:57,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826856382] [2024-01-31 16:00:57,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:57,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:00:57,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:57,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:00:57,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:00:57,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-01-31 16:00:57,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:57,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:57,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-01-31 16:00:57,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:57,260 INFO L124 PetriNetUnfolderBase]: 1013/2417 cut-off events. [2024-01-31 16:00:57,260 INFO L125 PetriNetUnfolderBase]: For 216/242 co-relation queries the response was YES. [2024-01-31 16:00:57,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4808 conditions, 2417 events. 1013/2417 cut-off events. For 216/242 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 16531 event pairs, 159 based on Foata normal form. 22/2335 useless extension candidates. Maximal degree in co-relation 4800. Up to 1291 conditions per place. [2024-01-31 16:00:57,272 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 62 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2024-01-31 16:00:57,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 387 flow [2024-01-31 16:00:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:00:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:00:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-01-31 16:00:57,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-01-31 16:00:57,274 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 169 flow. Second operand 4 states and 195 transitions. [2024-01-31 16:00:57,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 387 flow [2024-01-31 16:00:57,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 379 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:00:57,281 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 187 flow [2024-01-31 16:00:57,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-01-31 16:00:57,284 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2024-01-31 16:00:57,284 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 187 flow [2024-01-31 16:00:57,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:57,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:57,285 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:57,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:00:57,288 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:00:57,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2028783150, now seen corresponding path program 1 times [2024-01-31 16:00:57,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:57,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836987189] [2024-01-31 16:00:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:57,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:57,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:57,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836987189] [2024-01-31 16:00:57,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836987189] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:00:57,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946654283] [2024-01-31 16:00:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:57,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:00:57,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:00:57,497 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:00:57,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:00:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:57,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:00:57,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:00:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:57,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:00:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:58,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946654283] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:00:58,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:00:58,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-01-31 16:00:58,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558010423] [2024-01-31 16:00:58,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:00:58,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:00:58,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:58,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:00:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:00:58,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 69 [2024-01-31 16:00:58,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 187 flow. Second operand has 8 states, 8 states have (on average 26.75) internal successors, (214), 8 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:58,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:58,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 69 [2024-01-31 16:00:58,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:58,962 INFO L124 PetriNetUnfolderBase]: 2598/4972 cut-off events. [2024-01-31 16:00:58,962 INFO L125 PetriNetUnfolderBase]: For 1184/1268 co-relation queries the response was YES. [2024-01-31 16:00:58,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10753 conditions, 4972 events. 2598/4972 cut-off events. For 1184/1268 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 29208 event pairs, 111 based on Foata normal form. 648/5405 useless extension candidates. Maximal degree in co-relation 10742. Up to 970 conditions per place. [2024-01-31 16:00:58,984 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 157 selfloop transitions, 6 changer transitions 0/181 dead transitions. [2024-01-31 16:00:58,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 181 transitions, 858 flow [2024-01-31 16:00:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:00:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:00:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 324 transitions. [2024-01-31 16:00:58,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2024-01-31 16:00:58,986 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 187 flow. Second operand 7 states and 324 transitions. [2024-01-31 16:00:58,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 181 transitions, 858 flow [2024-01-31 16:00:58,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 181 transitions, 851 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:00:58,990 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 204 flow [2024-01-31 16:00:58,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=204, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2024-01-31 16:00:58,990 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2024-01-31 16:00:58,990 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 204 flow [2024-01-31 16:00:58,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.75) internal successors, (214), 8 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:58,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:58,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:59,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 16:00:59,203 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 [2024-01-31 16:00:59,204 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:00:59,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1031377073, now seen corresponding path program 1 times [2024-01-31 16:00:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:59,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85362960] [2024-01-31 16:00:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:59,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:59,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:59,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85362960] [2024-01-31 16:00:59,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85362960] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:00:59,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551323443] [2024-01-31 16:00:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:59,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:00:59,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:00:59,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:00:59,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:00:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:59,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:00:59,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:00:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:59,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:00:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:59,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551323443] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:00:59,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:00:59,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-01-31 16:00:59,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836117416] [2024-01-31 16:00:59,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:00:59,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:00:59,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:59,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:00:59,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:00:59,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 69 [2024-01-31 16:00:59,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 27.25) internal successors, (218), 8 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:00:59,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:59,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 69 [2024-01-31 16:00:59,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:00,855 INFO L124 PetriNetUnfolderBase]: 4586/8199 cut-off events. [2024-01-31 16:01:00,855 INFO L125 PetriNetUnfolderBase]: For 4050/4050 co-relation queries the response was YES. [2024-01-31 16:01:00,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18822 conditions, 8199 events. 4586/8199 cut-off events. For 4050/4050 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 52450 event pairs, 163 based on Foata normal form. 1080/8579 useless extension candidates. Maximal degree in co-relation 18807. Up to 1928 conditions per place. [2024-01-31 16:01:00,906 INFO L140 encePairwiseOnDemand]: 59/69 looper letters, 144 selfloop transitions, 6 changer transitions 0/164 dead transitions. [2024-01-31 16:01:00,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 164 transitions, 906 flow [2024-01-31 16:01:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:01:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:01:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 314 transitions. [2024-01-31 16:01:00,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.650103519668737 [2024-01-31 16:01:00,909 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 204 flow. Second operand 7 states and 314 transitions. [2024-01-31 16:01:00,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 164 transitions, 906 flow [2024-01-31 16:01:00,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 164 transitions, 852 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-01-31 16:01:00,917 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 212 flow [2024-01-31 16:01:00,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2024-01-31 16:01:00,919 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2024-01-31 16:01:00,920 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 212 flow [2024-01-31 16:01:00,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.25) internal successors, (218), 8 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:00,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:00,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:01:00,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:01:01,139 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 [2024-01-31 16:01:01,139 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:01:01,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:01,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1993543258, now seen corresponding path program 1 times [2024-01-31 16:01:01,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:01,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112933150] [2024-01-31 16:01:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:01,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:01,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:01,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:01,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112933150] [2024-01-31 16:01:01,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112933150] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:01,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:01,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:01:01,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75649097] [2024-01-31 16:01:01,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:01,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:01:01,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:01,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:01:01,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:01:01,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 69 [2024-01-31 16:01:01,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:01,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:01,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 69 [2024-01-31 16:01:01,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:01,726 INFO L124 PetriNetUnfolderBase]: 1677/4376 cut-off events. [2024-01-31 16:01:01,726 INFO L125 PetriNetUnfolderBase]: For 2959/2959 co-relation queries the response was YES. [2024-01-31 16:01:01,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9975 conditions, 4376 events. 1677/4376 cut-off events. For 2959/2959 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 27842 event pairs, 504 based on Foata normal form. 276/4460 useless extension candidates. Maximal degree in co-relation 9956. Up to 2067 conditions per place. [2024-01-31 16:01:01,749 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 56 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-01-31 16:01:01,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 79 transitions, 440 flow [2024-01-31 16:01:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:01:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:01:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2024-01-31 16:01:01,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7246376811594203 [2024-01-31 16:01:01,750 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 212 flow. Second operand 3 states and 150 transitions. [2024-01-31 16:01:01,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 79 transitions, 440 flow [2024-01-31 16:01:01,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 422 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-31 16:01:01,755 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 211 flow [2024-01-31 16:01:01,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2024-01-31 16:01:01,756 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2024-01-31 16:01:01,756 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 211 flow [2024-01-31 16:01:01,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:01,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:01,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:01:01,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:01:01,757 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:01:01,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:01,758 INFO L85 PathProgramCache]: Analyzing trace with hash -714621065, now seen corresponding path program 1 times [2024-01-31 16:01:01,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:01,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862614164] [2024-01-31 16:01:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:01,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:01,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862614164] [2024-01-31 16:01:01,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862614164] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:01:01,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112242007] [2024-01-31 16:01:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:01,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:01:01,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:01:01,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:01:01,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:01:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:02,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:01:02,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:01:02,099 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 [2024-01-31 16:01:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:02,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:01:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:02,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112242007] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:01:02,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:01:02,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-31 16:01:02,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610208330] [2024-01-31 16:01:02,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:01:02,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:01:02,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:02,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:01:02,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:01:02,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-01-31 16:01:02,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:02,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:02,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-01-31 16:01:02,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:03,632 INFO L124 PetriNetUnfolderBase]: 5145/12095 cut-off events. [2024-01-31 16:01:03,632 INFO L125 PetriNetUnfolderBase]: For 9221/9221 co-relation queries the response was YES. [2024-01-31 16:01:03,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30328 conditions, 12095 events. 5145/12095 cut-off events. For 9221/9221 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 96218 event pairs, 999 based on Foata normal form. 114/11925 useless extension candidates. Maximal degree in co-relation 30309. Up to 1977 conditions per place. [2024-01-31 16:01:03,703 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 213 selfloop transitions, 19 changer transitions 0/249 dead transitions. [2024-01-31 16:01:03,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 249 transitions, 1506 flow [2024-01-31 16:01:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:01:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:01:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 574 transitions. [2024-01-31 16:01:03,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6932367149758454 [2024-01-31 16:01:03,705 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 211 flow. Second operand 12 states and 574 transitions. [2024-01-31 16:01:03,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 249 transitions, 1506 flow [2024-01-31 16:01:03,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 249 transitions, 1484 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:01:03,731 INFO L231 Difference]: Finished difference. Result has 94 places, 76 transitions, 341 flow [2024-01-31 16:01:03,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=341, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2024-01-31 16:01:03,731 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 27 predicate places. [2024-01-31 16:01:03,732 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 341 flow [2024-01-31 16:01:03,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:03,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:03,732 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] [2024-01-31 16:01:03,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:01:03,945 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 [2024-01-31 16:01:03,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:01:03,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1754071611, now seen corresponding path program 1 times [2024-01-31 16:01:03,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:03,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401511284] [2024-01-31 16:01:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:04,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:04,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401511284] [2024-01-31 16:01:04,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401511284] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:04,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:04,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:01:04,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124454011] [2024-01-31 16:01:04,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:04,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:01:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:04,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:01:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:01:04,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-01-31 16:01:04,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:04,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:04,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-01-31 16:01:04,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:05,598 INFO L124 PetriNetUnfolderBase]: 4975/11593 cut-off events. [2024-01-31 16:01:05,599 INFO L125 PetriNetUnfolderBase]: For 12053/12053 co-relation queries the response was YES. [2024-01-31 16:01:05,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30710 conditions, 11593 events. 4975/11593 cut-off events. For 12053/12053 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 91108 event pairs, 1692 based on Foata normal form. 16/11357 useless extension candidates. Maximal degree in co-relation 30683. Up to 7372 conditions per place. [2024-01-31 16:01:05,789 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 116 selfloop transitions, 7 changer transitions 0/140 dead transitions. [2024-01-31 16:01:05,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 140 transitions, 865 flow [2024-01-31 16:01:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:01:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:01:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 315 transitions. [2024-01-31 16:01:05,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-01-31 16:01:05,792 INFO L175 Difference]: Start difference. First operand has 94 places, 76 transitions, 341 flow. Second operand 7 states and 315 transitions. [2024-01-31 16:01:05,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 140 transitions, 865 flow [2024-01-31 16:01:05,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 140 transitions, 851 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:01:05,822 INFO L231 Difference]: Finished difference. Result has 103 places, 81 transitions, 388 flow [2024-01-31 16:01:05,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=103, PETRI_TRANSITIONS=81} [2024-01-31 16:01:05,822 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 36 predicate places. [2024-01-31 16:01:05,823 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 81 transitions, 388 flow [2024-01-31 16:01:05,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:05,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:05,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:01:05,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:01:05,823 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:01:05,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:05,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1020512474, now seen corresponding path program 1 times [2024-01-31 16:01:05,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:05,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164298503] [2024-01-31 16:01:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:05,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:06,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:06,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164298503] [2024-01-31 16:01:06,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164298503] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:01:06,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720379921] [2024-01-31 16:01:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:06,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:01:06,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:01:06,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:01:06,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:01:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:06,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:01:06,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:01:06,459 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 [2024-01-31 16:01:06,539 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 [2024-01-31 16:01:06,635 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 [2024-01-31 16:01:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:06,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:01:07,171 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 [2024-01-31 16:01:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:07,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720379921] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:01:07,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:01:07,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-01-31 16:01:07,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63486286] [2024-01-31 16:01:07,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:01:07,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:01:07,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:07,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:01:07,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:01:07,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-01-31 16:01:07,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 81 transitions, 388 flow. Second operand has 20 states, 20 states have (on average 36.05) internal successors, (721), 20 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:07,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:07,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-01-31 16:01:07,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:12,690 INFO L124 PetriNetUnfolderBase]: 12977/29783 cut-off events. [2024-01-31 16:01:12,690 INFO L125 PetriNetUnfolderBase]: For 38065/38065 co-relation queries the response was YES. [2024-01-31 16:01:12,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81661 conditions, 29783 events. 12977/29783 cut-off events. For 38065/38065 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 272422 event pairs, 1536 based on Foata normal form. 168/29667 useless extension candidates. Maximal degree in co-relation 81629. Up to 4566 conditions per place. [2024-01-31 16:01:12,910 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 645 selfloop transitions, 110 changer transitions 0/772 dead transitions. [2024-01-31 16:01:12,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 772 transitions, 5281 flow [2024-01-31 16:01:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-01-31 16:01:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-01-31 16:01:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2174 transitions. [2024-01-31 16:01:12,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6301449275362319 [2024-01-31 16:01:12,915 INFO L175 Difference]: Start difference. First operand has 103 places, 81 transitions, 388 flow. Second operand 50 states and 2174 transitions. [2024-01-31 16:01:12,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 772 transitions, 5281 flow [2024-01-31 16:01:13,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 772 transitions, 5278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:01:13,006 INFO L231 Difference]: Finished difference. Result has 155 places, 187 transitions, 1198 flow [2024-01-31 16:01:13,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=1198, PETRI_PLACES=155, PETRI_TRANSITIONS=187} [2024-01-31 16:01:13,007 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 88 predicate places. [2024-01-31 16:01:13,007 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 187 transitions, 1198 flow [2024-01-31 16:01:13,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 36.05) internal successors, (721), 20 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:13,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:13,008 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:01:13,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 16:01:13,220 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 [2024-01-31 16:01:13,220 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err7ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:01:13,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:13,221 INFO L85 PathProgramCache]: Analyzing trace with hash -49931293, now seen corresponding path program 1 times [2024-01-31 16:01:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:13,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451316977] [2024-01-31 16:01:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:13,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:01:13,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:13,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451316977] [2024-01-31 16:01:13,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451316977] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:13,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:13,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:01:13,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604211231] [2024-01-31 16:01:13,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:13,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:01:13,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:13,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:01:13,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:01:13,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-01-31 16:01:13,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 187 transitions, 1198 flow. Second operand has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:13,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:13,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-01-31 16:01:13,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:18,766 INFO L124 PetriNetUnfolderBase]: 19930/40386 cut-off events. [2024-01-31 16:01:18,766 INFO L125 PetriNetUnfolderBase]: For 47239/47359 co-relation queries the response was YES. [2024-01-31 16:01:18,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117674 conditions, 40386 events. 19930/40386 cut-off events. For 47239/47359 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 353924 event pairs, 6185 based on Foata normal form. 0/40255 useless extension candidates. Maximal degree in co-relation 117637. Up to 23110 conditions per place. [2024-01-31 16:01:19,088 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 364 selfloop transitions, 8 changer transitions 3/419 dead transitions. [2024-01-31 16:01:19,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 419 transitions, 3443 flow [2024-01-31 16:01:19,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:01:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:01:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 218 transitions. [2024-01-31 16:01:19,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318840579710145 [2024-01-31 16:01:19,090 INFO L175 Difference]: Start difference. First operand has 155 places, 187 transitions, 1198 flow. Second operand 5 states and 218 transitions. [2024-01-31 16:01:19,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 419 transitions, 3443 flow [2024-01-31 16:01:19,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 419 transitions, 2978 flow, removed 221 selfloop flow, removed 4 redundant places. [2024-01-31 16:01:19,489 INFO L231 Difference]: Finished difference. Result has 155 places, 187 transitions, 1017 flow [2024-01-31 16:01:19,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1017, PETRI_PLACES=155, PETRI_TRANSITIONS=187} [2024-01-31 16:01:19,491 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 88 predicate places. [2024-01-31 16:01:19,491 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 187 transitions, 1017 flow [2024-01-31 16:01:19,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:19,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:19,491 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:01:19,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:01:19,492 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:01:19,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:19,492 INFO L85 PathProgramCache]: Analyzing trace with hash 824457194, now seen corresponding path program 1 times [2024-01-31 16:01:19,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:19,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447432325] [2024-01-31 16:01:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:19,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:20,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:20,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447432325] [2024-01-31 16:01:20,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447432325] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:01:20,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68161934] [2024-01-31 16:01:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:20,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:01:20,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:01:20,122 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:01:20,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:01:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:20,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:01:20,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:01:20,292 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 [2024-01-31 16:01:20,356 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 [2024-01-31 16:01:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:20,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:01:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 16:01:20,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68161934] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:01:20,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:01:20,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 15 [2024-01-31 16:01:20,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102955611] [2024-01-31 16:01:20,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:01:20,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:01:20,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:01:20,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:01:20,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-01-31 16:01:20,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 187 transitions, 1017 flow. Second operand has 15 states, 15 states have (on average 38.46666666666667) internal successors, (577), 15 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:20,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:20,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-01-31 16:01:20,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:27,248 INFO L124 PetriNetUnfolderBase]: 19539/44495 cut-off events. [2024-01-31 16:01:27,249 INFO L125 PetriNetUnfolderBase]: For 91137/91137 co-relation queries the response was YES. [2024-01-31 16:01:27,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134071 conditions, 44495 events. 19539/44495 cut-off events. For 91137/91137 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 415802 event pairs, 3039 based on Foata normal form. 450/44665 useless extension candidates. Maximal degree in co-relation 134035. Up to 6816 conditions per place. [2024-01-31 16:01:27,821 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 515 selfloop transitions, 138 changer transitions 6/676 dead transitions. [2024-01-31 16:01:27,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 676 transitions, 5033 flow [2024-01-31 16:01:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:01:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:01:27,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1126 transitions. [2024-01-31 16:01:27,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6799516908212561 [2024-01-31 16:01:27,825 INFO L175 Difference]: Start difference. First operand has 155 places, 187 transitions, 1017 flow. Second operand 24 states and 1126 transitions. [2024-01-31 16:01:27,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 676 transitions, 5033 flow [2024-01-31 16:01:28,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 676 transitions, 4810 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-01-31 16:01:28,144 INFO L231 Difference]: Finished difference. Result has 186 places, 263 transitions, 1925 flow [2024-01-31 16:01:28,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1925, PETRI_PLACES=186, PETRI_TRANSITIONS=263} [2024-01-31 16:01:28,145 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 119 predicate places. [2024-01-31 16:01:28,145 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 263 transitions, 1925 flow [2024-01-31 16:01:28,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 38.46666666666667) internal successors, (577), 15 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:28,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:28,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:01:28,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 16:01:28,347 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 [2024-01-31 16:01:28,347 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:01:28,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1383027911, now seen corresponding path program 1 times [2024-01-31 16:01:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:28,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154697434] [2024-01-31 16:01:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:28,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:29,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:29,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154697434] [2024-01-31 16:01:29,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154697434] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:01:29,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071687236] [2024-01-31 16:01:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:29,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:01:29,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:01:29,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:01:29,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:01:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:29,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:01:29,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:01:29,829 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 [2024-01-31 16:01:29,940 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 82 treesize of output 66 [2024-01-31 16:01:29,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-01-31 16:01:29,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 29 [2024-01-31 16:01:30,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:01:30,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 57 [2024-01-31 16:01:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:30,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:01:31,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:01:31,216 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 18 treesize of output 14 [2024-01-31 16:01:31,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:01:31,251 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 20 treesize of output 16 [2024-01-31 16:01:31,277 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2024-01-31 16:01:31,277 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 [2024-01-31 16:01:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:31,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071687236] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:01:31,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:01:31,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-01-31 16:01:31,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961513953] [2024-01-31 16:01:31,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:01:31,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:01:31,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:01:31,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:01:31,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-01-31 16:01:31,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 263 transitions, 1925 flow. Second operand has 25 states, 25 states have (on average 35.96) internal successors, (899), 25 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:31,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:31,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-01-31 16:01:31,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:46,170 INFO L124 PetriNetUnfolderBase]: 28803/64851 cut-off events. [2024-01-31 16:01:46,170 INFO L125 PetriNetUnfolderBase]: For 121649/121649 co-relation queries the response was YES. [2024-01-31 16:01:46,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201888 conditions, 64851 events. 28803/64851 cut-off events. For 121649/121649 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 628954 event pairs, 4340 based on Foata normal form. 400/64880 useless extension candidates. Maximal degree in co-relation 201841. Up to 9886 conditions per place. [2024-01-31 16:01:46,897 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 800 selfloop transitions, 337 changer transitions 46/1200 dead transitions. [2024-01-31 16:01:46,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 1200 transitions, 9693 flow [2024-01-31 16:01:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-01-31 16:01:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-01-31 16:01:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 2805 transitions. [2024-01-31 16:01:46,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6254180602006689 [2024-01-31 16:01:46,909 INFO L175 Difference]: Start difference. First operand has 186 places, 263 transitions, 1925 flow. Second operand 65 states and 2805 transitions. [2024-01-31 16:01:46,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 1200 transitions, 9693 flow [2024-01-31 16:01:47,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 1200 transitions, 9577 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-01-31 16:01:47,514 INFO L231 Difference]: Finished difference. Result has 270 places, 459 transitions, 4368 flow [2024-01-31 16:01:47,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=4368, PETRI_PLACES=270, PETRI_TRANSITIONS=459} [2024-01-31 16:01:47,515 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 203 predicate places. [2024-01-31 16:01:47,515 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 459 transitions, 4368 flow [2024-01-31 16:01:47,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 35.96) internal successors, (899), 25 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:47,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:47,516 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:01:47,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-31 16:01:47,719 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 [2024-01-31 16:01:47,719 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err8ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-01-31 16:01:47,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:47,720 INFO L85 PathProgramCache]: Analyzing trace with hash -281625717, now seen corresponding path program 1 times [2024-01-31 16:01:47,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:47,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474137570] [2024-01-31 16:01:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:47,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-01-31 16:01:47,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:47,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474137570] [2024-01-31 16:01:47,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474137570] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:47,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:47,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:01:47,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097843750] [2024-01-31 16:01:47,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:47,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:01:47,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:47,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:01:47,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:01:47,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2024-01-31 16:01:47,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 459 transitions, 4368 flow. Second operand has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:47,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:47,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2024-01-31 16:01:47,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand