./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-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_longest-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_longest-2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-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 16:00:51,593 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:00:51,655 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:00:51,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:00:51,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:00:51,682 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:00:51,683 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:00:51,683 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:00:51,684 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:00:51,687 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:00:51,687 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:00:51,687 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:00:51,688 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:00:51,689 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:00:51,689 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:00:51,689 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:00:51,689 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:00:51,690 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:00:51,690 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:00:51,690 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:00:51,690 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:00:51,691 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:00:51,691 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:00:51,691 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:00:51,691 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:00:51,691 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:00:51,692 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:00:51,692 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:00:51,692 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:00:51,692 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:00:51,693 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:00:51,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:00:51,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:00:51,706 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:00:51,706 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:00:51,707 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:00:51,707 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:00:51,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:00:51,707 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:00:51,708 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:00:51,708 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:00:51,708 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:00:51,708 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:00:51,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:00:51,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:00:51,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:00:51,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:00:51,991 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:00:51,992 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:00:51,993 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2024-01-31 16:00:52,922 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:00:53,161 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:00:53,162 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2024-01-31 16:00:53,183 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9514a0c49/f71357a79d914ecd878fe55f262552b5/FLAGe4ef479db [2024-01-31 16:00:53,202 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9514a0c49/f71357a79d914ecd878fe55f262552b5 [2024-01-31 16:00:53,204 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:00:53,205 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:00:53,205 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml [2024-01-31 16:00:53,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:00:53,288 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:00:53,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:00:53,289 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:00:53,293 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:00:53,294 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:00:53" (1/2) ... [2024-01-31 16:00:53,294 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f76af9 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 16:00:53,295 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:00:53" (1/2) ... [2024-01-31 16:00:53,296 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2dd8c58d 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 16:00:53,296 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 16:00:53,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f76af9 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 16:00:53,297 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 16:00:53,297 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:00:53,351 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:00:53,353 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 <= 799)) || i == 4) [2024-01-31 16:00:53,353 INFO L98 nessWitnessExtractor]: Location invariant before [L1021-L1021] flag == (_Bool)0 [2024-01-31 16:00:53,353 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 <= 799)) [2024-01-31 16:00:53,353 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 <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-31 16:00:53,353 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 <= 799)) || (5 <= i && i <= 799)) || i == 4) [2024-01-31 16:00:53,354 INFO L98 nessWitnessExtractor]: Location invariant before [L1015-L1015] (i == 800) && ((unsigned long )arg == 0UL) [2024-01-31 16:00:53,354 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 <= 799)) [2024-01-31 16:00:53,354 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 <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-31 16:00:53,355 INFO L98 nessWitnessExtractor]: Location invariant before [L1020-L1020] flag == (_Bool)0 [2024-01-31 16:00:53,355 INFO L98 nessWitnessExtractor]: Location invariant before [L1000-L1000] (i == 800) && ((unsigned long )arg == 0UL) [2024-01-31 16:00:53,355 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 <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-31 16:00:53,355 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 <= 799)) [2024-01-31 16:00:53,355 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 <= 799)) || (0 == i && i == 0)) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 7) || i == 6) || i == 6) [2024-01-31 16:00:53,355 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 <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6) [2024-01-31 16:00:53,355 INFO L98 nessWitnessExtractor]: Loop invariant at [L991-L991] (unsigned long )arg == 0UL [2024-01-31 16:00:53,355 INFO L98 nessWitnessExtractor]: Loop invariant at [L1005-L1005] (unsigned long )arg == 0UL [2024-01-31 16:00:53,356 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 <= 799)) || i == 4) [2024-01-31 16:00:53,399 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:00:53,723 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_longest-2.i[41530,41543] [2024-01-31 16:00:53,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:00:53,757 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:00:53,793 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_longest-2.i[41530,41543] 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 16:00:53,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:00:53,891 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:00:53,892 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 16:00:53,892 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:00:53,893 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:00:53,893 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:00:53,894 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:00:53,899 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 16:00:53,930 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 16:00:53,967 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 173 [2024-01-31 16:00:53,971 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:00:53,972 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:00:53,972 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:00:53,972 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:00:53,981 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 16:00:53,981 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 16:00:53,991 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 16:00:54,027 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 5, 3, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0]. The 4 writes are split as follows [0, 1, 0, 2, 1]. [2024-01-31 16:00:54,027 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 16:00:54,028 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 16:00:54,042 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 16:00:54,073 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 16:00:54,089 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 16:00:54,091 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 16:00:54,095 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:00:54,096 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:00:54,096 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:00:54,096 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:00:54,097 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 16:00:54,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:00:54,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:00:54,145 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 16:00:54,155 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 16:00:54,189 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 16:00:54,190 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 16:00:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 16:00:54,190 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 16:00:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:00:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:00:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:00:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:00:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:00:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:00:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:00:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 16:00:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:00:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:00:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:00:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:00:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 16:00:54,196 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:00:54,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:00:54,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:00:54,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:00:54,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:00:54,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:00:54,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 16:00:54,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:00:54,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:00:54,199 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 16:00:54,332 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:00:54,334 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:00:54,673 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:00:54,673 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:00:54,804 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:00:54,805 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:00:54,805 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 16:00:54,805 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:00:54,807 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:00:54,807 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:00:54,810 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:00:54,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:00:53" (1/4) ... [2024-01-31 16:00:54,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71204ce3 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 16:00:54,810 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 16:00:54,811 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71204ce3 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 16:00:54,811 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 16:00:54,811 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71204ce3 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 16:00:54,811 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 16:00:54,812 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-01-31 16:00:54,825 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:00:54,825 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-01-31 16:00:54,825 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:00:54,881 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:00:54,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 69 transitions, 152 flow [2024-01-31 16:00:54,942 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2024-01-31 16:00:54,942 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:00:54,946 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 16:00:54,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 69 transitions, 152 flow [2024-01-31 16:00:54,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 139 flow [2024-01-31 16:00:54,963 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:00:54,971 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;@41460c0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:00:54,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-01-31 16:00:54,974 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:00:54,974 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:00:54,974 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:00:54,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:54,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:00:54,976 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 16:00:54,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:54,980 INFO L85 PathProgramCache]: Analyzing trace with hash 14238, now seen corresponding path program 1 times [2024-01-31 16:00:54,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:54,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586093362] [2024-01-31 16:00:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:54,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:55,207 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 16:00:55,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:55,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586093362] [2024-01-31 16:00:55,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586093362] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:55,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:55,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:00:55,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018794269] [2024-01-31 16:00:55,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:55,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:00:55,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:55,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:00:55,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:00:55,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-01-31 16:00:55,247 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 16:00:55,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:55,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-01-31 16:00:55,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:55,473 INFO L124 PetriNetUnfolderBase]: 411/1077 cut-off events. [2024-01-31 16:00:55,473 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-01-31 16:00:55,478 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 16:00:55,485 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 30 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2024-01-31 16:00:55,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 193 flow [2024-01-31 16:00:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:00:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:00:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-01-31 16:00:55,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6328502415458938 [2024-01-31 16:00:55,498 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 139 flow. Second operand 3 states and 131 transitions. [2024-01-31 16:00:55,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 193 flow [2024-01-31 16:00:55,502 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 16:00:55,506 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 128 flow [2024-01-31 16:00:55,507 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 16:00:55,511 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2024-01-31 16:00:55,511 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 128 flow [2024-01-31 16:00:55,511 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 16:00:55,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:55,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:00:55,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:00:55,512 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 16:00:55,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash 277773959, now seen corresponding path program 1 times [2024-01-31 16:00:55,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:55,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750304105] [2024-01-31 16:00:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:55,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:55,656 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 16:00:55,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:55,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750304105] [2024-01-31 16:00:55,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750304105] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:55,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:55,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:00:55,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165622481] [2024-01-31 16:00:55,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:55,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:00:55,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:55,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:00:55,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:00:55,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-01-31 16:00:55,714 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 16:00:55,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:55,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-01-31 16:00:55,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:55,860 INFO L124 PetriNetUnfolderBase]: 428/1052 cut-off events. [2024-01-31 16:00:55,860 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:00:55,862 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 16:00:55,865 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 42 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-01-31 16:00:55,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 242 flow [2024-01-31 16:00:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:00:55,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:00:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-01-31 16:00:55,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-01-31 16:00:55,867 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 128 flow. Second operand 4 states and 177 transitions. [2024-01-31 16:00:55,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 242 flow [2024-01-31 16:00:55,868 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 16:00:55,869 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 129 flow [2024-01-31 16:00:55,869 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 16:00:55,869 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2024-01-31 16:00:55,870 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 129 flow [2024-01-31 16:00:55,870 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 16:00:55,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:55,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:55,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:00:55,870 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 16:00:55,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:55,871 INFO L85 PathProgramCache]: Analyzing trace with hash 652839743, now seen corresponding path program 1 times [2024-01-31 16:00:55,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:55,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828608662] [2024-01-31 16:00:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:55,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:56,007 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 16:00:56,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:56,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828608662] [2024-01-31 16:00:56,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828608662] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:56,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:56,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:00:56,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109353996] [2024-01-31 16:00:56,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:56,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:00:56,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:00:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:00:56,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-01-31 16:00:56,057 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 16:00:56,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:56,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-01-31 16:00:56,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:56,229 INFO L124 PetriNetUnfolderBase]: 393/1070 cut-off events. [2024-01-31 16:00:56,229 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-01-31 16:00:56,231 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 16:00:56,235 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 56 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-01-31 16:00:56,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 302 flow [2024-01-31 16:00:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:00:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:00:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-01-31 16:00:56,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6920289855072463 [2024-01-31 16:00:56,240 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 129 flow. Second operand 4 states and 191 transitions. [2024-01-31 16:00:56,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 302 flow [2024-01-31 16:00:56,241 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 16:00:56,242 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 128 flow [2024-01-31 16:00:56,242 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 16:00:56,243 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2024-01-31 16:00:56,244 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 128 flow [2024-01-31 16:00:56,244 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 16:00:56,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:56,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:56,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:00:56,245 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 16:00:56,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash 652817834, now seen corresponding path program 1 times [2024-01-31 16:00:56,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:56,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85768307] [2024-01-31 16:00:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:56,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:56,309 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 16:00:56,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:56,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85768307] [2024-01-31 16:00:56,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85768307] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:56,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:56,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:00:56,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552584334] [2024-01-31 16:00:56,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:56,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:00:56,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:56,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:00:56,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:00:56,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-01-31 16:00:56,329 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 16:00:56,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:56,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-01-31 16:00:56,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:56,573 INFO L124 PetriNetUnfolderBase]: 882/1932 cut-off events. [2024-01-31 16:00:56,573 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-01-31 16:00:56,576 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 16:00:56,582 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 56 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-01-31 16:00:56,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 292 flow [2024-01-31 16:00:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:00:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:00:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2024-01-31 16:00:56,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7053140096618358 [2024-01-31 16:00:56,584 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 128 flow. Second operand 3 states and 146 transitions. [2024-01-31 16:00:56,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 292 flow [2024-01-31 16:00:56,585 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 16:00:56,586 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 149 flow [2024-01-31 16:00:56,586 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 16:00:56,587 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2024-01-31 16:00:56,587 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 149 flow [2024-01-31 16:00:56,587 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 16:00:56,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:56,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:56,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:00:56,588 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 16:00:56,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:56,589 INFO L85 PathProgramCache]: Analyzing trace with hash 313784258, now seen corresponding path program 1 times [2024-01-31 16:00:56,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:56,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204785476] [2024-01-31 16:00:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:56,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:56,622 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 16:00:56,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204785476] [2024-01-31 16:00:56,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204785476] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:56,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:56,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:00:56,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627923128] [2024-01-31 16:00:56,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:56,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:00:56,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:00:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:00:56,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2024-01-31 16:00:56,643 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 16:00:56,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:56,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2024-01-31 16:00:56,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:56,924 INFO L124 PetriNetUnfolderBase]: 1382/3218 cut-off events. [2024-01-31 16:00:56,925 INFO L125 PetriNetUnfolderBase]: For 184/196 co-relation queries the response was YES. [2024-01-31 16:00:56,930 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 16:00:56,941 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 57 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-01-31 16:00:56,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 323 flow [2024-01-31 16:00:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:00:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:00:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-01-31 16:00:56,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101449275362319 [2024-01-31 16:00:56,943 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 149 flow. Second operand 3 states and 147 transitions. [2024-01-31 16:00:56,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 323 flow [2024-01-31 16:00:56,945 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 16:00:56,946 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 169 flow [2024-01-31 16:00:56,947 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 16:00:56,948 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2024-01-31 16:00:56,949 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 169 flow [2024-01-31 16:00:56,949 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 16:00:56,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:56,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:56,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:00:56,949 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 16:00:56,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:56,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1509423826, now seen corresponding path program 1 times [2024-01-31 16:00:56,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:56,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493386315] [2024-01-31 16:00:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:56,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:57,066 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 16:00:57,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:57,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493386315] [2024-01-31 16:00:57,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493386315] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:57,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:57,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:00:57,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531961222] [2024-01-31 16:00:57,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:57,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:00:57,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:57,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:00:57,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:00:57,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-01-31 16:00:57,072 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 16:00:57,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:57,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-01-31 16:00:57,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:57,291 INFO L124 PetriNetUnfolderBase]: 1013/2417 cut-off events. [2024-01-31 16:00:57,291 INFO L125 PetriNetUnfolderBase]: For 216/242 co-relation queries the response was YES. [2024-01-31 16:00:57,294 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 16:00:57,301 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 62 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2024-01-31 16:00:57,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 387 flow [2024-01-31 16:00:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:00:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:00:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-01-31 16:00:57,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-01-31 16:00:57,303 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 169 flow. Second operand 4 states and 195 transitions. [2024-01-31 16:00:57,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 387 flow [2024-01-31 16:00:57,306 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 16:00:57,307 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 187 flow [2024-01-31 16:00:57,308 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 16:00:57,310 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2024-01-31 16:00:57,310 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 187 flow [2024-01-31 16:00:57,310 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 16:00:57,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:57,310 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 16:00:57,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:00:57,314 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 16:00:57,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:57,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2028783150, now seen corresponding path program 1 times [2024-01-31 16:00:57,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:57,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636150511] [2024-01-31 16:00:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:57,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:57,451 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 16:00:57,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:57,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636150511] [2024-01-31 16:00:57,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636150511] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:00:57,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234985441] [2024-01-31 16:00:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:57,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:00:57,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:00:57,454 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 16:00:57,475 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 16:00:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:57,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:00:57,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:00:57,669 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 16:00:57,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:00:58,165 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 16:00:58,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234985441] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:00:58,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:00:58,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-01-31 16:00:58,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921224252] [2024-01-31 16:00:58,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:00:58,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:00:58,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:58,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:00:58,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:00:58,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 69 [2024-01-31 16:00:58,198 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 16:00:58,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:58,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 69 [2024-01-31 16:00:58,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:58,892 INFO L124 PetriNetUnfolderBase]: 2598/4972 cut-off events. [2024-01-31 16:00:58,892 INFO L125 PetriNetUnfolderBase]: For 1184/1268 co-relation queries the response was YES. [2024-01-31 16:00:58,897 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 16:00:58,916 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 157 selfloop transitions, 6 changer transitions 0/181 dead transitions. [2024-01-31 16:00:58,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 181 transitions, 858 flow [2024-01-31 16:00:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:00:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:00:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 324 transitions. [2024-01-31 16:00:58,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2024-01-31 16:00:58,919 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 187 flow. Second operand 7 states and 324 transitions. [2024-01-31 16:00:58,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 181 transitions, 858 flow [2024-01-31 16:00:58,922 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 16:00:58,925 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 204 flow [2024-01-31 16:00:58,925 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 16:00:58,926 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2024-01-31 16:00:58,926 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 204 flow [2024-01-31 16:00:58,926 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 16:00:58,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:58,926 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 16:00:58,942 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 16:00:59,136 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 16:00:59,136 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 16:00:59,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:59,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1031377073, now seen corresponding path program 1 times [2024-01-31 16:00:59,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:59,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168649917] [2024-01-31 16:00:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:59,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:59,256 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 16:00:59,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:59,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168649917] [2024-01-31 16:00:59,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168649917] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:00:59,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465710346] [2024-01-31 16:00:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:59,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:00:59,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:00:59,258 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 16:00:59,262 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 16:00:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:59,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:00:59,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:00:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:59,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:00:59,745 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 16:00:59,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465710346] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:00:59,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:00:59,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-01-31 16:00:59,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31851734] [2024-01-31 16:00:59,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:00:59,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:00:59,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:59,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:00:59,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:00:59,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 69 [2024-01-31 16:00:59,773 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 16:00:59,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:59,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 69 [2024-01-31 16:00:59,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:00,723 INFO L124 PetriNetUnfolderBase]: 4586/8199 cut-off events. [2024-01-31 16:01:00,723 INFO L125 PetriNetUnfolderBase]: For 4050/4050 co-relation queries the response was YES. [2024-01-31 16:01:00,735 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 16:01:00,757 INFO L140 encePairwiseOnDemand]: 59/69 looper letters, 144 selfloop transitions, 6 changer transitions 0/164 dead transitions. [2024-01-31 16:01:00,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 164 transitions, 906 flow [2024-01-31 16:01:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:01:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:01:00,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 314 transitions. [2024-01-31 16:01:00,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.650103519668737 [2024-01-31 16:01:00,759 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 204 flow. Second operand 7 states and 314 transitions. [2024-01-31 16:01:00,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 164 transitions, 906 flow [2024-01-31 16:01:00,763 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 16:01:00,764 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 212 flow [2024-01-31 16:01:00,765 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 16:01:00,765 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2024-01-31 16:01:00,765 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 212 flow [2024-01-31 16:01:00,766 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 16:01:00,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:00,766 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 16:01:00,782 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 16:01:00,978 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 16:01:00,979 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 16:01:00,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1993543258, now seen corresponding path program 1 times [2024-01-31 16:01:00,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:00,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845110005] [2024-01-31 16:01:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:01,065 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 16:01:01,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:01,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845110005] [2024-01-31 16:01:01,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845110005] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:01,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:01,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:01:01,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159572400] [2024-01-31 16:01:01,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:01,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:01:01,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:01,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:01:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:01:01,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 69 [2024-01-31 16:01:01,068 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 16:01:01,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:01,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 69 [2024-01-31 16:01:01,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:01,457 INFO L124 PetriNetUnfolderBase]: 1677/4376 cut-off events. [2024-01-31 16:01:01,458 INFO L125 PetriNetUnfolderBase]: For 2959/2959 co-relation queries the response was YES. [2024-01-31 16:01:01,467 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 16:01:01,483 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 56 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-01-31 16:01:01,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 79 transitions, 440 flow [2024-01-31 16:01:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:01:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:01:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2024-01-31 16:01:01,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7246376811594203 [2024-01-31 16:01:01,485 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 212 flow. Second operand 3 states and 150 transitions. [2024-01-31 16:01:01,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 79 transitions, 440 flow [2024-01-31 16:01:01,490 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 16:01:01,491 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 211 flow [2024-01-31 16:01:01,491 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 16:01:01,492 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2024-01-31 16:01:01,492 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 211 flow [2024-01-31 16:01:01,492 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 16:01:01,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:01,493 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 16:01:01,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:01:01,493 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 16:01:01,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:01,493 INFO L85 PathProgramCache]: Analyzing trace with hash -714621065, now seen corresponding path program 1 times [2024-01-31 16:01:01,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:01,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721713937] [2024-01-31 16:01:01,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:01,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:01,628 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 16:01:01,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:01,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721713937] [2024-01-31 16:01:01,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721713937] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:01:01,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794143911] [2024-01-31 16:01:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:01,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:01:01,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:01:01,631 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 16:01:01,657 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 16:01:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:01,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:01:01,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:01:01,777 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 16:01:01,908 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 16:01:01,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:01:01,970 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 16:01:01,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794143911] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:01:01,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:01:01,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-01-31 16:01:01,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050156128] [2024-01-31 16:01:01,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:01:01,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:01:01,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:01:01,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-01-31 16:01:01,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-01-31 16:01:01,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 211 flow. Second operand has 9 states, 9 states have (on average 37.77777777777778) internal successors, (340), 9 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:01,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:01,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-01-31 16:01:01,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:03,384 INFO L124 PetriNetUnfolderBase]: 5145/12095 cut-off events. [2024-01-31 16:01:03,385 INFO L125 PetriNetUnfolderBase]: For 9221/9221 co-relation queries the response was YES. [2024-01-31 16:01:03,417 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 16:01:03,467 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 213 selfloop transitions, 19 changer transitions 0/249 dead transitions. [2024-01-31 16:01:03,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 249 transitions, 1506 flow [2024-01-31 16:01:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:01:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:01:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 574 transitions. [2024-01-31 16:01:03,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6932367149758454 [2024-01-31 16:01:03,470 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 211 flow. Second operand 12 states and 574 transitions. [2024-01-31 16:01:03,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 249 transitions, 1506 flow [2024-01-31 16:01:03,496 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 16:01:03,498 INFO L231 Difference]: Finished difference. Result has 94 places, 76 transitions, 341 flow [2024-01-31 16:01:03,499 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 16:01:03,499 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 27 predicate places. [2024-01-31 16:01:03,500 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 341 flow [2024-01-31 16:01:03,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 37.77777777777778) internal successors, (340), 9 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:03,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:03,500 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 16:01:03,515 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 16:01:03,716 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 16:01:03,717 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 16:01:03,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:03,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1754071611, now seen corresponding path program 1 times [2024-01-31 16:01:03,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:03,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224178384] [2024-01-31 16:01:03,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:03,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:04,241 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 16:01:04,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:04,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224178384] [2024-01-31 16:01:04,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224178384] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:04,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:04,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:01:04,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974701635] [2024-01-31 16:01:04,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:04,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:01:04,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:04,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:01:04,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:01:04,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-01-31 16:01:04,247 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 16:01:04,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:04,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-01-31 16:01:04,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:05,624 INFO L124 PetriNetUnfolderBase]: 5373/12579 cut-off events. [2024-01-31 16:01:05,625 INFO L125 PetriNetUnfolderBase]: For 13098/13098 co-relation queries the response was YES. [2024-01-31 16:01:05,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33192 conditions, 12579 events. 5373/12579 cut-off events. For 13098/13098 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 101277 event pairs, 1296 based on Foata normal form. 16/12361 useless extension candidates. Maximal degree in co-relation 33165. Up to 6272 conditions per place. [2024-01-31 16:01:05,869 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 117 selfloop transitions, 13 changer transitions 0/147 dead transitions. [2024-01-31 16:01:05,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 147 transitions, 914 flow [2024-01-31 16:01:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:01:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:01:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 319 transitions. [2024-01-31 16:01:05,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.660455486542443 [2024-01-31 16:01:05,872 INFO L175 Difference]: Start difference. First operand has 94 places, 76 transitions, 341 flow. Second operand 7 states and 319 transitions. [2024-01-31 16:01:05,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 147 transitions, 914 flow [2024-01-31 16:01:05,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 147 transitions, 900 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:01:05,922 INFO L231 Difference]: Finished difference. Result has 104 places, 82 transitions, 419 flow [2024-01-31 16:01:05,923 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=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=419, PETRI_PLACES=104, PETRI_TRANSITIONS=82} [2024-01-31 16:01:05,923 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 37 predicate places. [2024-01-31 16:01:05,923 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 82 transitions, 419 flow [2024-01-31 16:01:05,924 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 16:01:05,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:05,924 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 16:01:05,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:01:05,924 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 16:01:05,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1020512474, now seen corresponding path program 1 times [2024-01-31 16:01:05,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:05,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144524351] [2024-01-31 16:01:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:05,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:06,407 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 16:01:06,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:06,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144524351] [2024-01-31 16:01:06,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144524351] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:01:06,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449353357] [2024-01-31 16:01:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:06,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:01:06,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:01:06,409 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 16:01:06,412 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 16:01:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:06,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:01:06,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:01:06,549 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 16:01:06,636 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 16:01:06,727 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 16:01:06,769 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 16:01:06,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:01:07,142 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 16:01:07,194 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 16:01:07,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449353357] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:01:07,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:01:07,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-01-31 16:01:07,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88604360] [2024-01-31 16:01:07,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:01:07,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:01:07,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:07,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:01:07,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:01:07,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-01-31 16:01:07,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 82 transitions, 419 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 16:01:07,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:07,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-01-31 16:01:07,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:12,857 INFO L124 PetriNetUnfolderBase]: 13269/30451 cut-off events. [2024-01-31 16:01:12,857 INFO L125 PetriNetUnfolderBase]: For 44812/44812 co-relation queries the response was YES. [2024-01-31 16:01:13,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84992 conditions, 30451 events. 13269/30451 cut-off events. For 44812/44812 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 279917 event pairs, 1568 based on Foata normal form. 168/30335 useless extension candidates. Maximal degree in co-relation 84959. Up to 4668 conditions per place. [2024-01-31 16:01:13,234 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 646 selfloop transitions, 110 changer transitions 0/773 dead transitions. [2024-01-31 16:01:13,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 773 transitions, 5400 flow [2024-01-31 16:01:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-01-31 16:01:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-01-31 16:01:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2174 transitions. [2024-01-31 16:01:13,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6301449275362319 [2024-01-31 16:01:13,243 INFO L175 Difference]: Start difference. First operand has 104 places, 82 transitions, 419 flow. Second operand 50 states and 2174 transitions. [2024-01-31 16:01:13,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 773 transitions, 5400 flow [2024-01-31 16:01:13,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 773 transitions, 5400 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:01:13,419 INFO L231 Difference]: Finished difference. Result has 157 places, 188 transitions, 1304 flow [2024-01-31 16:01:13,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=1304, PETRI_PLACES=157, PETRI_TRANSITIONS=188} [2024-01-31 16:01:13,419 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 90 predicate places. [2024-01-31 16:01:13,419 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 188 transitions, 1304 flow [2024-01-31 16:01:13,420 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 16:01:13,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:13,420 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 16:01:13,433 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 16:01:13,631 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 16:01:13,632 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 16:01:13,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:13,632 INFO L85 PathProgramCache]: Analyzing trace with hash -49931293, now seen corresponding path program 1 times [2024-01-31 16:01:13,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:13,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847183876] [2024-01-31 16:01:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:13,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:13,731 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 16:01:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847183876] [2024-01-31 16:01:13,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847183876] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:13,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:13,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:01:13,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733048260] [2024-01-31 16:01:13,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:01:13,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:13,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:01:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:01:13,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-01-31 16:01:13,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 188 transitions, 1304 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 16:01:13,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:13,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-01-31 16:01:13,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:19,266 INFO L124 PetriNetUnfolderBase]: 20349/41191 cut-off events. [2024-01-31 16:01:19,266 INFO L125 PetriNetUnfolderBase]: For 51053/51173 co-relation queries the response was YES. [2024-01-31 16:01:19,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120952 conditions, 41191 events. 20349/41191 cut-off events. For 51053/51173 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 362238 event pairs, 6291 based on Foata normal form. 0/41056 useless extension candidates. Maximal degree in co-relation 120913. Up to 23549 conditions per place. [2024-01-31 16:01:19,619 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 364 selfloop transitions, 8 changer transitions 3/420 dead transitions. [2024-01-31 16:01:19,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 420 transitions, 3599 flow [2024-01-31 16:01:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:01:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:01:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 218 transitions. [2024-01-31 16:01:19,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318840579710145 [2024-01-31 16:01:19,621 INFO L175 Difference]: Start difference. First operand has 157 places, 188 transitions, 1304 flow. Second operand 5 states and 218 transitions. [2024-01-31 16:01:19,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 420 transitions, 3599 flow [2024-01-31 16:01:19,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 420 transitions, 3176 flow, removed 200 selfloop flow, removed 4 redundant places. [2024-01-31 16:01:19,935 INFO L231 Difference]: Finished difference. Result has 157 places, 188 transitions, 1141 flow [2024-01-31 16:01:19,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1141, PETRI_PLACES=157, PETRI_TRANSITIONS=188} [2024-01-31 16:01:19,936 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 90 predicate places. [2024-01-31 16:01:19,936 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 188 transitions, 1141 flow [2024-01-31 16:01:19,936 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 16:01:19,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:19,936 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 16:01:19,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:01:19,937 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 16:01:19,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:19,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1089138768, now seen corresponding path program 1 times [2024-01-31 16:01:19,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:19,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267795738] [2024-01-31 16:01:19,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:19,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:20,241 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 16:01:20,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:20,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267795738] [2024-01-31 16:01:20,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267795738] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:01:20,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671651254] [2024-01-31 16:01:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:20,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:01:20,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:01:20,243 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 16:01:20,244 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 16:01:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:20,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:01:20,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:01:20,417 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 16:01:20,480 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 16:01:20,925 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 16:01:20,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:01:20,967 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 16:01:20,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671651254] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:01:20,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:01:20,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 13 [2024-01-31 16:01:20,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220426319] [2024-01-31 16:01:20,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:01:20,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:01:20,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:20,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:01:20,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:01:20,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-01-31 16:01:20,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 188 transitions, 1141 flow. Second operand has 13 states, 13 states have (on average 37.30769230769231) internal successors, (485), 13 states have internal predecessors, (485), 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 16:01:20,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:20,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-01-31 16:01:20,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:28,767 INFO L124 PetriNetUnfolderBase]: 22091/50259 cut-off events. [2024-01-31 16:01:28,768 INFO L125 PetriNetUnfolderBase]: For 117392/117392 co-relation queries the response was YES. [2024-01-31 16:01:29,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153827 conditions, 50259 events. 22091/50259 cut-off events. For 117392/117392 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 476780 event pairs, 3575 based on Foata normal form. 686/50669 useless extension candidates. Maximal degree in co-relation 153789. Up to 7746 conditions per place. [2024-01-31 16:01:29,192 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 570 selfloop transitions, 173 changer transitions 7/767 dead transitions. [2024-01-31 16:01:29,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 767 transitions, 5948 flow [2024-01-31 16:01:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:01:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:01:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1256 transitions. [2024-01-31 16:01:29,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6741814278046162 [2024-01-31 16:01:29,195 INFO L175 Difference]: Start difference. First operand has 157 places, 188 transitions, 1141 flow. Second operand 27 states and 1256 transitions. [2024-01-31 16:01:29,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 767 transitions, 5948 flow [2024-01-31 16:01:29,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 767 transitions, 5698 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-01-31 16:01:29,792 INFO L231 Difference]: Finished difference. Result has 196 places, 301 transitions, 2522 flow [2024-01-31 16:01:29,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2522, PETRI_PLACES=196, PETRI_TRANSITIONS=301} [2024-01-31 16:01:29,793 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 129 predicate places. [2024-01-31 16:01:29,793 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 301 transitions, 2522 flow [2024-01-31 16:01:29,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.30769230769231) internal successors, (485), 13 states have internal predecessors, (485), 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 16:01:29,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:29,794 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 16:01:29,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 16:01:30,005 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 16:01:30,006 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 16:01:30,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:30,006 INFO L85 PathProgramCache]: Analyzing trace with hash 52765613, now seen corresponding path program 1 times [2024-01-31 16:01:30,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:30,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572174410] [2024-01-31 16:01:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:30,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:31,241 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 16:01:31,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:31,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572174410] [2024-01-31 16:01:31,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572174410] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:01:31,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146287463] [2024-01-31 16:01:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:31,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:01:31,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:01:31,244 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 16:01:31,273 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 16:01:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:31,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:01:31,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:01:31,428 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 16:01:31,548 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 16:01:31,551 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 16:01:31,566 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 16:01:32,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:01:32,285 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 16:01:32,333 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 16:01:32,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:01:32,971 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 112 treesize of output 106 [2024-01-31 16:01:32,998 INFO L349 Elim1Store]: treesize reduction 43, result has 48.2 percent of original size [2024-01-31 16:01:32,999 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 4 case distinctions, treesize of input 106 treesize of output 138 [2024-01-31 16:01:33,096 INFO L349 Elim1Store]: treesize reduction 18, result has 55.0 percent of original size [2024-01-31 16:01:33,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 108 [2024-01-31 16:01:33,225 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-01-31 16:01:33,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 104 treesize of output 96 [2024-01-31 16:01:33,349 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 16:01:33,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146287463] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:01:33,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:01:33,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-01-31 16:01:33,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275382171] [2024-01-31 16:01:33,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:01:33,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:01:33,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:33,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:01:33,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:01:33,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-01-31 16:01:33,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 301 transitions, 2522 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 16:01:33,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:33,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-01-31 16:01:33,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:53,952 INFO L124 PetriNetUnfolderBase]: 39181/88217 cut-off events. [2024-01-31 16:01:53,952 INFO L125 PetriNetUnfolderBase]: For 217040/217040 co-relation queries the response was YES. [2024-01-31 16:01:54,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284411 conditions, 88217 events. 39181/88217 cut-off events. For 217040/217040 co-relation queries the response was YES. Maximal size of possible extension queue 946. Compared 844687 event pairs, 5614 based on Foata normal form. 424/88122 useless extension candidates. Maximal degree in co-relation 284357. Up to 13476 conditions per place. [2024-01-31 16:01:54,967 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 941 selfloop transitions, 496 changer transitions 67/1521 dead transitions. [2024-01-31 16:01:54,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 1521 transitions, 13396 flow [2024-01-31 16:01:54,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-01-31 16:01:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-01-31 16:01:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 2862 transitions. [2024-01-31 16:01:54,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6284584980237155 [2024-01-31 16:01:54,971 INFO L175 Difference]: Start difference. First operand has 196 places, 301 transitions, 2522 flow. Second operand 66 states and 2862 transitions. [2024-01-31 16:01:54,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 1521 transitions, 13396 flow [2024-01-31 16:01:56,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1521 transitions, 13308 flow, removed 44 selfloop flow, removed 0 redundant places. [2024-01-31 16:01:56,761 INFO L231 Difference]: Finished difference. Result has 293 places, 682 transitions, 7540 flow [2024-01-31 16:01:56,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=7540, PETRI_PLACES=293, PETRI_TRANSITIONS=682} [2024-01-31 16:01:56,762 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 226 predicate places. [2024-01-31 16:01:56,762 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 682 transitions, 7540 flow [2024-01-31 16:01:56,763 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 16:01:56,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:56,763 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 16:01:56,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:01:56,967 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 16:01:56,967 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 16:01:56,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:56,967 INFO L85 PathProgramCache]: Analyzing trace with hash -281625717, now seen corresponding path program 1 times [2024-01-31 16:01:56,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:56,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188979821] [2024-01-31 16:01:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:56,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:57,088 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 16:01:57,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:57,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188979821] [2024-01-31 16:01:57,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188979821] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:57,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:57,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:01:57,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204360376] [2024-01-31 16:01:57,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:57,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:01:57,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:57,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:01:57,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:01:57,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2024-01-31 16:01:57,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 682 transitions, 7540 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 16:01:57,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:57,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2024-01-31 16:01:57,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand