./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stateful01-2.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/stateful01-2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 59af5db6 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/stateful01-2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stateful01-2.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-dev-59af5db-m [2024-02-02 09:11:22,121 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 09:11:22,185 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 09:11:22,189 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 09:11:22,190 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 09:11:22,212 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 09:11:22,213 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 09:11:22,214 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 09:11:22,214 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 09:11:22,217 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 09:11:22,218 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 09:11:22,218 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 09:11:22,219 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 09:11:22,220 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 09:11:22,220 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 09:11:22,220 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 09:11:22,220 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 09:11:22,221 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 09:11:22,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 09:11:22,221 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 09:11:22,221 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 09:11:22,222 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 09:11:22,222 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 09:11:22,222 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 09:11:22,222 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 09:11:22,223 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 09:11:22,223 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 09:11:22,223 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 09:11:22,224 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 09:11:22,224 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 09:11:22,225 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 09:11:22,225 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 09:11:22,225 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:11:22,225 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 09:11:22,226 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 09:11:22,226 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 09:11:22,226 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 09:11:22,226 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 09:11:22,226 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 09:11:22,226 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 09:11:22,227 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 09:11:22,227 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 09:11:22,227 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 09:11:22,227 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 09:11:22,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 09:11:22,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 09:11:22,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 09:11:22,486 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 09:11:22,487 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 09:11:22,487 INFO L431 ainManager$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/stateful01-2.yml/witness.yml [2024-02-02 09:11:22,671 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 09:11:22,674 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 09:11:22,674 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stateful01-2.i [2024-02-02 09:11:23,789 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 09:11:23,990 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 09:11:23,991 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stateful01-2.i [2024-02-02 09:11:24,005 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc8b62ec1/3c8819a478ca4a6b9679b90e825c2f55/FLAG1a4cb1d45 [2024-02-02 09:11:24,017 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc8b62ec1/3c8819a478ca4a6b9679b90e825c2f55 [2024-02-02 09:11:24,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 09:11:24,019 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 09:11:24,019 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 09:11:24,020 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 09:11:24,023 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 09:11:24,024 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:11:22" (1/2) ... [2024-02-02 09:11:24,025 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53853440 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:24, skipping insertion in model container [2024-02-02 09:11:24,025 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:11:22" (1/2) ... [2024-02-02 09:11:24,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20a070ff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:24, skipping insertion in model container [2024-02-02 09:11:24,026 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:11:24" (2/2) ... [2024-02-02 09:11:24,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53853440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24, skipping insertion in model container [2024-02-02 09:11:24,027 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:11:24" (2/2) ... [2024-02-02 09:11:24,027 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 09:11:24,076 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 09:11:24,078 INFO L101 nessWitnessExtractor]: Location invariant before [L708-L708] (15 <= data1) && ((unsigned long )arg == 0UL) [2024-02-02 09:11:24,078 INFO L101 nessWitnessExtractor]: Location invariant before [L707-L707] (10 <= data1) && ((unsigned long )arg == 0UL) [2024-02-02 09:11:24,078 INFO L101 nessWitnessExtractor]: Location invariant before [L717-L717] (data1 == 0) && (data2 == 0) [2024-02-02 09:11:24,078 INFO L101 nessWitnessExtractor]: Location invariant before [L719-L719] (data1 == 0) && (data2 == 0) [2024-02-02 09:11:24,078 INFO L101 nessWitnessExtractor]: Location invariant before [L706-L706] (unsigned long )arg == 0UL [2024-02-02 09:11:24,078 INFO L101 nessWitnessExtractor]: Location invariant before [L712-L712] (unsigned long )arg == 0UL [2024-02-02 09:11:24,078 INFO L101 nessWitnessExtractor]: Location invariant before [L718-L718] (data1 == 0) && (data2 == 0) [2024-02-02 09:11:24,079 INFO L101 nessWitnessExtractor]: Location invariant before [L699-L699] (unsigned long )arg == 0UL [2024-02-02 09:11:24,079 INFO L101 nessWitnessExtractor]: Location invariant before [L702-L702] (unsigned long )arg == 0UL [2024-02-02 09:11:24,079 INFO L101 nessWitnessExtractor]: Location invariant before [L720-L720] (data1 == 10) && (data2 == 0) [2024-02-02 09:11:24,079 INFO L101 nessWitnessExtractor]: Location invariant before [L709-L709] (unsigned long )arg == 0UL [2024-02-02 09:11:24,079 INFO L101 nessWitnessExtractor]: Location invariant before [L698-L698] (11 <= data1) && ((unsigned long )arg == 0UL) [2024-02-02 09:11:24,079 INFO L101 nessWitnessExtractor]: Location invariant before [L710-L710] (10 <= data1) && ((unsigned long )arg == 0UL) [2024-02-02 09:11:24,079 INFO L101 nessWitnessExtractor]: Location invariant before [L701-L701] ((-2147483647 <= data2) && (10 <= data1)) && ((unsigned long )arg == 0UL) [2024-02-02 09:11:24,079 INFO L101 nessWitnessExtractor]: Location invariant before [L696-L696] (unsigned long )arg == 0UL [2024-02-02 09:11:24,080 INFO L101 nessWitnessExtractor]: Location invariant before [L721-L721] (data1 == 10) && (data2 == 10) [2024-02-02 09:11:24,080 INFO L101 nessWitnessExtractor]: Location invariant before [L697-L697] (10 <= data1) && ((unsigned long )arg == 0UL) [2024-02-02 09:11:24,080 INFO L101 nessWitnessExtractor]: Location invariant before [L711-L711] ((10 <= data1) && (data2 <= 2147483641)) && ((unsigned long )arg == 0UL) [2024-02-02 09:11:24,080 INFO L101 nessWitnessExtractor]: Location invariant before [L700-L700] (10 <= data1) && ((unsigned long )arg == 0UL) [2024-02-02 09:11:24,117 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-02 09:11:24,412 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/stateful01-2.i[30826,30839] [2024-02-02 09:11:24,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:11:24,449 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 09:11:24,565 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/stateful01-2.i[30826,30839] [2024-02-02 09:11:24,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:11:24,604 INFO L206 MainTranslator]: Completed translation [2024-02-02 09:11:24,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24 WrapperNode [2024-02-02 09:11:24,605 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 09:11:24,606 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 09:11:24,606 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 09:11:24,606 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 09:11:24,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (1/1) ... [2024-02-02 09:11:24,634 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (1/1) ... [2024-02-02 09:11:24,654 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-02-02 09:11:24,655 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 09:11:24,656 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 09:11:24,656 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 09:11:24,656 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 09:11:24,663 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (1/1) ... [2024-02-02 09:11:24,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (1/1) ... [2024-02-02 09:11:24,679 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (1/1) ... [2024-02-02 09:11:24,695 INFO L175 MemorySlicer]: Split 16 memory accesses to 5 slices as follows [2, 5, 5, 2, 2]. 31 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0, 0]. The 2 writes are split as follows [0, 0, 0, 1, 1]. [2024-02-02 09:11:24,696 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (1/1) ... [2024-02-02 09:11:24,696 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (1/1) ... [2024-02-02 09:11:24,702 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (1/1) ... [2024-02-02 09:11:24,704 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (1/1) ... [2024-02-02 09:11:24,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (1/1) ... [2024-02-02 09:11:24,713 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (1/1) ... [2024-02-02 09:11:24,715 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 09:11:24,719 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 09:11:24,719 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 09:11:24,719 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 09:11:24,720 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (1/1) ... [2024-02-02 09:11:24,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:11:24,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:24,753 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-02 09:11:24,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-02 09:11:24,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-02 09:11:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-02 09:11:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-02 09:11:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-02 09:11:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-02 09:11:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-02 09:11:24,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-02 09:11:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-02 09:11:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-02 09:11:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 09:11:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 09:11:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 09:11:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-02 09:11:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-02 09:11:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-02 09:11:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 09:11:24,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 09:11:24,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 09:11:24,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 09:11:24,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 09:11:24,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 09:11:24,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-02 09:11:24,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-02 09:11:24,789 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-02 09:11:24,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 09:11:24,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 09:11:24,791 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-02 09:11:24,893 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 09:11:24,895 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 09:11:25,066 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 09:11:25,066 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 09:11:25,189 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 09:11:25,189 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-02-02 09:11:25,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:11:25 BoogieIcfgContainer [2024-02-02 09:11:25,191 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 09:11:25,193 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 09:11:25,193 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 09:11:25,196 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 09:11:25,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:11:22" (1/4) ... [2024-02-02 09:11:25,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311c8063 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:11:25, skipping insertion in model container [2024-02-02 09:11:25,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 09:11:24" (2/4) ... [2024-02-02 09:11:25,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311c8063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:11:25, skipping insertion in model container [2024-02-02 09:11:25,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:24" (3/4) ... [2024-02-02 09:11:25,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311c8063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:11:25, skipping insertion in model container [2024-02-02 09:11:25,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:11:25" (4/4) ... [2024-02-02 09:11:25,200 INFO L112 eAbstractionObserver]: Analyzing ICFG stateful01-2.i [2024-02-02 09:11:25,213 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 09:11:25,213 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-02-02 09:11:25,213 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 09:11:25,280 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-02 09:11:25,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 72 transitions, 158 flow [2024-02-02 09:11:25,345 INFO L124 PetriNetUnfolderBase]: 1/70 cut-off events. [2024-02-02 09:11:25,349 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 09:11:25,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 70 events. 1/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-02-02 09:11:25,353 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 72 transitions, 158 flow [2024-02-02 09:11:25,357 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 67 transitions, 146 flow [2024-02-02 09:11:25,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:11:25,375 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;@54ce5f8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:11:25,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2024-02-02 09:11:25,378 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:11:25,378 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 09:11:25,378 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:11:25,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:25,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 09:11:25,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:25,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:25,384 INFO L85 PathProgramCache]: Analyzing trace with hash 9449, now seen corresponding path program 1 times [2024-02-02 09:11:25,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:25,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924130967] [2024-02-02 09:11:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:25,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:25,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924130967] [2024-02-02 09:11:25,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924130967] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:25,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:25,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:11:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385637295] [2024-02-02 09:11:25,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:25,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:11:25,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:25,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:11:25,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:11:25,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 72 [2024-02-02 09:11:25,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:25,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:25,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 72 [2024-02-02 09:11:25,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:25,884 INFO L124 PetriNetUnfolderBase]: 297/777 cut-off events. [2024-02-02 09:11:25,884 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-02-02 09:11:25,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 777 events. 297/777 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4301 event pairs, 297 based on Foata normal form. 0/732 useless extension candidates. Maximal degree in co-relation 1244. Up to 542 conditions per place. [2024-02-02 09:11:25,896 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 29 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-02-02 09:11:25,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 64 transitions, 202 flow [2024-02-02 09:11:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:11:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:11:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2024-02-02 09:11:25,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2024-02-02 09:11:25,910 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 146 flow. Second operand 3 states and 139 transitions. [2024-02-02 09:11:25,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 64 transitions, 202 flow [2024-02-02 09:11:25,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 194 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-02 09:11:25,916 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 136 flow [2024-02-02 09:11:25,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-02-02 09:11:25,922 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2024-02-02 09:11:25,922 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 136 flow [2024-02-02 09:11:25,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:25,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:25,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 09:11:25,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 09:11:25,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:25,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:25,925 INFO L85 PathProgramCache]: Analyzing trace with hash 281774487, now seen corresponding path program 1 times [2024-02-02 09:11:25,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:25,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953604008] [2024-02-02 09:11:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:25,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:26,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:26,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953604008] [2024-02-02 09:11:26,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953604008] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:26,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:26,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 09:11:26,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482104106] [2024-02-02 09:11:26,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:26,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:26,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:26,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 72 [2024-02-02 09:11:26,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:26,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:26,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 72 [2024-02-02 09:11:26,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:26,179 INFO L124 PetriNetUnfolderBase]: 240/707 cut-off events. [2024-02-02 09:11:26,180 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-02 09:11:26,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 707 events. 240/707 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4085 event pairs, 240 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 1154. Up to 442 conditions per place. [2024-02-02 09:11:26,183 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 26 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-02-02 09:11:26,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 192 flow [2024-02-02 09:11:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 186 transitions. [2024-02-02 09:11:26,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-02-02 09:11:26,185 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 136 flow. Second operand 4 states and 186 transitions. [2024-02-02 09:11:26,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 192 flow [2024-02-02 09:11:26,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:26,187 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 136 flow [2024-02-02 09:11:26,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-02-02 09:11:26,188 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2024-02-02 09:11:26,188 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 136 flow [2024-02-02 09:11:26,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:26,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:26,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-02 09:11:26,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 09:11:26,189 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:26,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:26,189 INFO L85 PathProgramCache]: Analyzing trace with hash 145074782, now seen corresponding path program 1 times [2024-02-02 09:11:26,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:26,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314083190] [2024-02-02 09:11:26,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:26,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:26,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314083190] [2024-02-02 09:11:26,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314083190] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:26,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:26,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:26,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932993071] [2024-02-02 09:11:26,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:26,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:26,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:26,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:26,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 72 [2024-02-02 09:11:26,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:26,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:26,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 72 [2024-02-02 09:11:26,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:26,404 INFO L124 PetriNetUnfolderBase]: 240/703 cut-off events. [2024-02-02 09:11:26,405 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-02 09:11:26,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1164 conditions, 703 events. 240/703 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4033 event pairs, 105 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 1148. Up to 424 conditions per place. [2024-02-02 09:11:26,408 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 32 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2024-02-02 09:11:26,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 221 flow [2024-02-02 09:11:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 193 transitions. [2024-02-02 09:11:26,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6701388888888888 [2024-02-02 09:11:26,414 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 136 flow. Second operand 4 states and 193 transitions. [2024-02-02 09:11:26,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 221 flow [2024-02-02 09:11:26,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 215 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-02 09:11:26,416 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 147 flow [2024-02-02 09:11:26,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-02-02 09:11:26,418 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2024-02-02 09:11:26,418 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 147 flow [2024-02-02 09:11:26,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:26,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:26,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:26,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 09:11:26,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:26,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:26,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1186100666, now seen corresponding path program 1 times [2024-02-02 09:11:26,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:26,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917466816] [2024-02-02 09:11:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:26,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:26,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:26,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917466816] [2024-02-02 09:11:26,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917466816] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:26,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:26,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:26,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962384444] [2024-02-02 09:11:26,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:26,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:26,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:26,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:26,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:26,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 72 [2024-02-02 09:11:26,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:26,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:26,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 72 [2024-02-02 09:11:26,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:26,648 INFO L124 PetriNetUnfolderBase]: 213/673 cut-off events. [2024-02-02 09:11:26,649 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-02-02 09:11:26,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 673 events. 213/673 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3871 event pairs, 107 based on Foata normal form. 36/640 useless extension candidates. Maximal degree in co-relation 408. Up to 367 conditions per place. [2024-02-02 09:11:26,652 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 38 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-02-02 09:11:26,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 245 flow [2024-02-02 09:11:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2024-02-02 09:11:26,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6840277777777778 [2024-02-02 09:11:26,653 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 147 flow. Second operand 4 states and 197 transitions. [2024-02-02 09:11:26,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 245 flow [2024-02-02 09:11:26,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:26,655 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 140 flow [2024-02-02 09:11:26,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-02-02 09:11:26,656 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2024-02-02 09:11:26,656 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 140 flow [2024-02-02 09:11:26,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:26,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:26,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:26,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 09:11:26,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:26,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1675956508, now seen corresponding path program 1 times [2024-02-02 09:11:26,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:26,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466669845] [2024-02-02 09:11:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:26,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:26,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:26,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466669845] [2024-02-02 09:11:26,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466669845] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:26,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:26,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:26,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878762668] [2024-02-02 09:11:26,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:26,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:26,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:26,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:26,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:26,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 72 [2024-02-02 09:11:26,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:26,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:26,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 72 [2024-02-02 09:11:26,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:26,849 INFO L124 PetriNetUnfolderBase]: 213/640 cut-off events. [2024-02-02 09:11:26,849 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-02-02 09:11:26,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 640 events. 213/640 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3711 event pairs, 11 based on Foata normal form. 36/629 useless extension candidates. Maximal degree in co-relation 1069. Up to 337 conditions per place. [2024-02-02 09:11:26,852 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 45 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-02-02 09:11:26,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 75 transitions, 267 flow [2024-02-02 09:11:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2024-02-02 09:11:26,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-02-02 09:11:26,853 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 140 flow. Second operand 4 states and 204 transitions. [2024-02-02 09:11:26,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 75 transitions, 267 flow [2024-02-02 09:11:26,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:26,855 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 135 flow [2024-02-02 09:11:26,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2024-02-02 09:11:26,856 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -9 predicate places. [2024-02-02 09:11:26,856 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 135 flow [2024-02-02 09:11:26,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:26,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:26,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:26,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 09:11:26,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:26,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:26,857 INFO L85 PathProgramCache]: Analyzing trace with hash 429324338, now seen corresponding path program 1 times [2024-02-02 09:11:26,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:26,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999707513] [2024-02-02 09:11:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:26,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:26,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:26,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999707513] [2024-02-02 09:11:26,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999707513] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:26,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:26,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45956602] [2024-02-02 09:11:26,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:26,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:26,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:26,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-02-02 09:11:26,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:26,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:26,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-02-02 09:11:26,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:27,083 INFO L124 PetriNetUnfolderBase]: 387/889 cut-off events. [2024-02-02 09:11:27,083 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-02-02 09:11:27,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1695 conditions, 889 events. 387/889 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4588 event pairs, 183 based on Foata normal form. 22/901 useless extension candidates. Maximal degree in co-relation 1474. Up to 611 conditions per place. [2024-02-02 09:11:27,087 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 46 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-02-02 09:11:27,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 68 transitions, 256 flow [2024-02-02 09:11:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 172 transitions. [2024-02-02 09:11:27,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-02-02 09:11:27,089 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 135 flow. Second operand 4 states and 172 transitions. [2024-02-02 09:11:27,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 68 transitions, 256 flow [2024-02-02 09:11:27,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:27,091 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 132 flow [2024-02-02 09:11:27,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2024-02-02 09:11:27,093 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -10 predicate places. [2024-02-02 09:11:27,093 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 132 flow [2024-02-02 09:11:27,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:27,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:27,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:27,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-02 09:11:27,094 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:27,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:27,095 INFO L85 PathProgramCache]: Analyzing trace with hash 424152925, now seen corresponding path program 1 times [2024-02-02 09:11:27,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:27,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971232247] [2024-02-02 09:11:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:27,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:27,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:27,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971232247] [2024-02-02 09:11:27,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971232247] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:27,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:27,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:11:27,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558097501] [2024-02-02 09:11:27,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:27,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:11:27,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:27,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:11:27,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:11:27,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-02-02 09:11:27,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:27,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:27,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-02-02 09:11:27,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:27,367 INFO L124 PetriNetUnfolderBase]: 431/987 cut-off events. [2024-02-02 09:11:27,368 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-02-02 09:11:27,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1895 conditions, 987 events. 431/987 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5277 event pairs, 183 based on Foata normal form. 0/977 useless extension candidates. Maximal degree in co-relation 1674. Up to 591 conditions per place. [2024-02-02 09:11:27,372 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 55 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2024-02-02 09:11:27,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 308 flow [2024-02-02 09:11:27,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:11:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:11:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-02-02 09:11:27,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-02-02 09:11:27,373 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 132 flow. Second operand 5 states and 211 transitions. [2024-02-02 09:11:27,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 308 flow [2024-02-02 09:11:27,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 305 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:27,376 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 160 flow [2024-02-02 09:11:27,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2024-02-02 09:11:27,378 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-02-02 09:11:27,378 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 160 flow [2024-02-02 09:11:27,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:27,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:27,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:27,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-02 09:11:27,379 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:27,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:27,380 INFO L85 PathProgramCache]: Analyzing trace with hash -574135609, now seen corresponding path program 1 times [2024-02-02 09:11:27,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:27,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658008657] [2024-02-02 09:11:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:27,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:27,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:27,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658008657] [2024-02-02 09:11:27,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658008657] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:27,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:27,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:27,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81817680] [2024-02-02 09:11:27,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:27,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:27,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:27,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:27,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:27,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-02-02 09:11:27,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:27,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:27,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-02-02 09:11:27,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:27,590 INFO L124 PetriNetUnfolderBase]: 441/984 cut-off events. [2024-02-02 09:11:27,591 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-02-02 09:11:27,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2011 conditions, 984 events. 441/984 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5227 event pairs, 71 based on Foata normal form. 22/999 useless extension candidates. Maximal degree in co-relation 1987. Up to 663 conditions per place. [2024-02-02 09:11:27,595 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 49 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-02-02 09:11:27,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 288 flow [2024-02-02 09:11:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 172 transitions. [2024-02-02 09:11:27,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-02-02 09:11:27,596 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 160 flow. Second operand 4 states and 172 transitions. [2024-02-02 09:11:27,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 288 flow [2024-02-02 09:11:27,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:27,597 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 157 flow [2024-02-02 09:11:27,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-02-02 09:11:27,598 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -9 predicate places. [2024-02-02 09:11:27,598 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 157 flow [2024-02-02 09:11:27,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:27,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:27,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:27,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-02 09:11:27,599 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:27,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash -618334337, now seen corresponding path program 1 times [2024-02-02 09:11:27,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:27,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444018580] [2024-02-02 09:11:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:27,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:27,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:27,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444018580] [2024-02-02 09:11:27,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444018580] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:27,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:27,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:11:27,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877298995] [2024-02-02 09:11:27,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:27,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:11:27,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:27,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:11:27,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:11:27,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-02-02 09:11:27,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:27,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:27,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-02-02 09:11:27,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:27,857 INFO L124 PetriNetUnfolderBase]: 441/960 cut-off events. [2024-02-02 09:11:27,858 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-02-02 09:11:27,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2009 conditions, 960 events. 441/960 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4947 event pairs, 71 based on Foata normal form. 26/979 useless extension candidates. Maximal degree in co-relation 1985. Up to 559 conditions per place. [2024-02-02 09:11:27,861 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 57 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2024-02-02 09:11:27,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 332 flow [2024-02-02 09:11:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:11:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:11:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 209 transitions. [2024-02-02 09:11:27,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-02-02 09:11:27,863 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 157 flow. Second operand 5 states and 209 transitions. [2024-02-02 09:11:27,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 332 flow [2024-02-02 09:11:27,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 329 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:27,864 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 162 flow [2024-02-02 09:11:27,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2024-02-02 09:11:27,865 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-02-02 09:11:27,865 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 162 flow [2024-02-02 09:11:27,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:27,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:27,866 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] [2024-02-02 09:11:27,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-02 09:11:27,866 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:27,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:27,866 INFO L85 PathProgramCache]: Analyzing trace with hash 346957208, now seen corresponding path program 1 times [2024-02-02 09:11:27,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:27,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908717065] [2024-02-02 09:11:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:27,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:27,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:27,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908717065] [2024-02-02 09:11:27,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908717065] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:27,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:27,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:11:27,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974976702] [2024-02-02 09:11:27,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:27,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-02 09:11:27,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:27,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-02 09:11:27,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-02-02 09:11:28,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 72 [2024-02-02 09:11:28,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:28,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:28,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 72 [2024-02-02 09:11:28,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:28,193 INFO L124 PetriNetUnfolderBase]: 393/911 cut-off events. [2024-02-02 09:11:28,193 INFO L125 PetriNetUnfolderBase]: For 234/237 co-relation queries the response was YES. [2024-02-02 09:11:28,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1902 conditions, 911 events. 393/911 cut-off events. For 234/237 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4704 event pairs, 59 based on Foata normal form. 2/867 useless extension candidates. Maximal degree in co-relation 1684. Up to 250 conditions per place. [2024-02-02 09:11:28,197 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 69 selfloop transitions, 11 changer transitions 0/96 dead transitions. [2024-02-02 09:11:28,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 429 flow [2024-02-02 09:11:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-02 09:11:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-02 09:11:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 253 transitions. [2024-02-02 09:11:28,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5856481481481481 [2024-02-02 09:11:28,199 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 162 flow. Second operand 6 states and 253 transitions. [2024-02-02 09:11:28,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 429 flow [2024-02-02 09:11:28,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 96 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-02 09:11:28,202 INFO L231 Difference]: Finished difference. Result has 72 places, 61 transitions, 222 flow [2024-02-02 09:11:28,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=72, PETRI_TRANSITIONS=61} [2024-02-02 09:11:28,206 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2024-02-02 09:11:28,206 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 61 transitions, 222 flow [2024-02-02 09:11:28,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:28,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:28,207 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] [2024-02-02 09:11:28,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-02 09:11:28,207 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:28,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:28,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1994266963, now seen corresponding path program 1 times [2024-02-02 09:11:28,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:28,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611454142] [2024-02-02 09:11:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:28,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:28,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:28,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611454142] [2024-02-02 09:11:28,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611454142] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:28,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:28,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:11:28,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366987620] [2024-02-02 09:11:28,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:28,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-02 09:11:28,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:28,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-02 09:11:28,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-02-02 09:11:28,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-02-02 09:11:28,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 61 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 34.166666666666664) internal successors, (205), 6 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:28,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:28,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-02-02 09:11:28,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:28,510 INFO L124 PetriNetUnfolderBase]: 406/897 cut-off events. [2024-02-02 09:11:28,511 INFO L125 PetriNetUnfolderBase]: For 485/485 co-relation queries the response was YES. [2024-02-02 09:11:28,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 897 events. 406/897 cut-off events. For 485/485 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4587 event pairs, 61 based on Foata normal form. 0/880 useless extension candidates. Maximal degree in co-relation 2066. Up to 262 conditions per place. [2024-02-02 09:11:28,516 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 69 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2024-02-02 09:11:28,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 491 flow [2024-02-02 09:11:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-02 09:11:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-02 09:11:28,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 262 transitions. [2024-02-02 09:11:28,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-02-02 09:11:28,517 INFO L175 Difference]: Start difference. First operand has 72 places, 61 transitions, 222 flow. Second operand 6 states and 262 transitions. [2024-02-02 09:11:28,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 491 flow [2024-02-02 09:11:28,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:11:28,520 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 289 flow [2024-02-02 09:11:28,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2024-02-02 09:11:28,521 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2024-02-02 09:11:28,521 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 289 flow [2024-02-02 09:11:28,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.166666666666664) internal successors, (205), 6 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:28,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:28,521 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, 1, 1, 1, 1] [2024-02-02 09:11:28,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-02 09:11:28,522 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:28,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:28,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2142017965, now seen corresponding path program 1 times [2024-02-02 09:11:28,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:28,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928522932] [2024-02-02 09:11:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:28,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:28,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:28,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928522932] [2024-02-02 09:11:28,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928522932] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:28,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:28,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:28,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121864375] [2024-02-02 09:11:28,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:28,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:11:28,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:28,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:11:28,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:11:28,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 72 [2024-02-02 09:11:28,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:28,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:28,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 72 [2024-02-02 09:11:28,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:28,674 INFO L124 PetriNetUnfolderBase]: 146/475 cut-off events. [2024-02-02 09:11:28,675 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-02-02 09:11:28,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 475 events. 146/475 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2280 event pairs, 46 based on Foata normal form. 41/502 useless extension candidates. Maximal degree in co-relation 1050. Up to 176 conditions per place. [2024-02-02 09:11:28,677 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 38 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-02-02 09:11:28,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 397 flow [2024-02-02 09:11:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:11:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:11:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2024-02-02 09:11:28,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7731481481481481 [2024-02-02 09:11:28,679 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 289 flow. Second operand 3 states and 167 transitions. [2024-02-02 09:11:28,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 397 flow [2024-02-02 09:11:28,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 373 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-02-02 09:11:28,681 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 281 flow [2024-02-02 09:11:28,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2024-02-02 09:11:28,682 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2024-02-02 09:11:28,682 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 281 flow [2024-02-02 09:11:28,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:28,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:28,682 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, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:28,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-02 09:11:28,683 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:28,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:28,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2032871053, now seen corresponding path program 1 times [2024-02-02 09:11:28,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:28,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435332071] [2024-02-02 09:11:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:28,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:28,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:28,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435332071] [2024-02-02 09:11:28,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435332071] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:28,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:28,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-02 09:11:28,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898970154] [2024-02-02 09:11:28,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:28,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-02 09:11:28,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:28,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-02 09:11:28,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-02-02 09:11:28,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-02-02 09:11:28,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 281 flow. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:28,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:28,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-02-02 09:11:28,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:29,046 INFO L124 PetriNetUnfolderBase]: 278/727 cut-off events. [2024-02-02 09:11:29,046 INFO L125 PetriNetUnfolderBase]: For 430/432 co-relation queries the response was YES. [2024-02-02 09:11:29,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1780 conditions, 727 events. 278/727 cut-off events. For 430/432 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3714 event pairs, 89 based on Foata normal form. 6/726 useless extension candidates. Maximal degree in co-relation 1749. Up to 195 conditions per place. [2024-02-02 09:11:29,050 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 78 selfloop transitions, 13 changer transitions 0/109 dead transitions. [2024-02-02 09:11:29,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 109 transitions, 606 flow [2024-02-02 09:11:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 09:11:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 09:11:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 302 transitions. [2024-02-02 09:11:29,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-02-02 09:11:29,051 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 281 flow. Second operand 7 states and 302 transitions. [2024-02-02 09:11:29,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 109 transitions, 606 flow [2024-02-02 09:11:29,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 109 transitions, 582 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:11:29,054 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 314 flow [2024-02-02 09:11:29,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2024-02-02 09:11:29,054 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2024-02-02 09:11:29,054 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 314 flow [2024-02-02 09:11:29,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:29,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:29,055 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, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:29,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-02 09:11:29,055 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:29,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 713933860, now seen corresponding path program 1 times [2024-02-02 09:11:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:29,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976232032] [2024-02-02 09:11:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:29,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:29,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:29,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976232032] [2024-02-02 09:11:29,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976232032] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:29,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:29,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-02 09:11:29,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326572348] [2024-02-02 09:11:29,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:29,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-02 09:11:29,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:29,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-02 09:11:29,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-02 09:11:29,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 72 [2024-02-02 09:11:29,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 32.714285714285715) internal successors, (229), 7 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:29,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:29,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 72 [2024-02-02 09:11:29,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:29,454 INFO L124 PetriNetUnfolderBase]: 347/963 cut-off events. [2024-02-02 09:11:29,454 INFO L125 PetriNetUnfolderBase]: For 827/841 co-relation queries the response was YES. [2024-02-02 09:11:29,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2253 conditions, 963 events. 347/963 cut-off events. For 827/841 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5493 event pairs, 67 based on Foata normal form. 10/966 useless extension candidates. Maximal degree in co-relation 1999. Up to 188 conditions per place. [2024-02-02 09:11:29,458 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 92 selfloop transitions, 14 changer transitions 0/123 dead transitions. [2024-02-02 09:11:29,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 123 transitions, 698 flow [2024-02-02 09:11:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 09:11:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 09:11:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 301 transitions. [2024-02-02 09:11:29,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-02-02 09:11:29,460 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 314 flow. Second operand 7 states and 301 transitions. [2024-02-02 09:11:29,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 123 transitions, 698 flow [2024-02-02 09:11:29,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 123 transitions, 660 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-02-02 09:11:29,463 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 339 flow [2024-02-02 09:11:29,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=88, PETRI_TRANSITIONS=69} [2024-02-02 09:11:29,464 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-02-02 09:11:29,464 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 339 flow [2024-02-02 09:11:29,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.714285714285715) internal successors, (229), 7 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:29,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:29,464 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, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:29,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-02 09:11:29,465 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:29,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:29,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1735046634, now seen corresponding path program 2 times [2024-02-02 09:11:29,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:29,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252552750] [2024-02-02 09:11:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:29,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:29,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:29,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252552750] [2024-02-02 09:11:29,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252552750] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:29,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:29,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-02 09:11:29,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139831763] [2024-02-02 09:11:29,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:29,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-02 09:11:29,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:29,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-02 09:11:29,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-02 09:11:29,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 72 [2024-02-02 09:11:29,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 69 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 32.714285714285715) internal successors, (229), 7 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:29,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:29,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 72 [2024-02-02 09:11:29,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:29,850 INFO L124 PetriNetUnfolderBase]: 373/1031 cut-off events. [2024-02-02 09:11:29,851 INFO L125 PetriNetUnfolderBase]: For 924/938 co-relation queries the response was YES. [2024-02-02 09:11:29,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2407 conditions, 1031 events. 373/1031 cut-off events. For 924/938 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 6027 event pairs, 97 based on Foata normal form. 10/1033 useless extension candidates. Maximal degree in co-relation 2263. Up to 282 conditions per place. [2024-02-02 09:11:29,855 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 85 selfloop transitions, 15 changer transitions 0/117 dead transitions. [2024-02-02 09:11:29,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 117 transitions, 670 flow [2024-02-02 09:11:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 09:11:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 09:11:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 295 transitions. [2024-02-02 09:11:29,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853174603174603 [2024-02-02 09:11:29,857 INFO L175 Difference]: Start difference. First operand has 88 places, 69 transitions, 339 flow. Second operand 7 states and 295 transitions. [2024-02-02 09:11:29,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 117 transitions, 670 flow [2024-02-02 09:11:29,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 117 transitions, 662 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:29,861 INFO L231 Difference]: Finished difference. Result has 94 places, 70 transitions, 381 flow [2024-02-02 09:11:29,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=381, PETRI_PLACES=94, PETRI_TRANSITIONS=70} [2024-02-02 09:11:29,861 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2024-02-02 09:11:29,861 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 70 transitions, 381 flow [2024-02-02 09:11:29,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.714285714285715) internal successors, (229), 7 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:29,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:29,862 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, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:29,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-02 09:11:29,862 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:29,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:29,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1403748165, now seen corresponding path program 2 times [2024-02-02 09:11:29,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:29,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835928669] [2024-02-02 09:11:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:29,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:29,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:29,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835928669] [2024-02-02 09:11:29,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835928669] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:29,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:29,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-02 09:11:29,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246767998] [2024-02-02 09:11:29,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:29,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-02 09:11:29,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:29,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-02 09:11:29,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-02-02 09:11:30,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-02-02 09:11:30,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 70 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:30,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:30,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-02-02 09:11:30,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:30,245 INFO L124 PetriNetUnfolderBase]: 436/1185 cut-off events. [2024-02-02 09:11:30,246 INFO L125 PetriNetUnfolderBase]: For 1455/1459 co-relation queries the response was YES. [2024-02-02 09:11:30,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2799 conditions, 1185 events. 436/1185 cut-off events. For 1455/1459 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7445 event pairs, 117 based on Foata normal form. 6/1184 useless extension candidates. Maximal degree in co-relation 2761. Up to 275 conditions per place. [2024-02-02 09:11:30,252 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 86 selfloop transitions, 19 changer transitions 0/123 dead transitions. [2024-02-02 09:11:30,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 123 transitions, 759 flow [2024-02-02 09:11:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-02 09:11:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-02 09:11:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 342 transitions. [2024-02-02 09:11:30,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-02-02 09:11:30,254 INFO L175 Difference]: Start difference. First operand has 94 places, 70 transitions, 381 flow. Second operand 8 states and 342 transitions. [2024-02-02 09:11:30,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 123 transitions, 759 flow [2024-02-02 09:11:30,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 123 transitions, 730 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-02-02 09:11:30,259 INFO L231 Difference]: Finished difference. Result has 99 places, 72 transitions, 436 flow [2024-02-02 09:11:30,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=436, PETRI_PLACES=99, PETRI_TRANSITIONS=72} [2024-02-02 09:11:30,259 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2024-02-02 09:11:30,259 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 72 transitions, 436 flow [2024-02-02 09:11:30,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:30,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:30,260 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, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:30,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-02 09:11:30,260 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:30,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash -647895063, now seen corresponding path program 3 times [2024-02-02 09:11:30,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:30,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9569237] [2024-02-02 09:11:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:30,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:30,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:30,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9569237] [2024-02-02 09:11:30,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9569237] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:30,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:30,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-02 09:11:30,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830319620] [2024-02-02 09:11:30,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:30,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-02 09:11:30,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-02 09:11:30,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-02-02 09:11:30,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-02-02 09:11:30,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 72 transitions, 436 flow. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:30,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:30,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-02-02 09:11:30,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:30,629 INFO L124 PetriNetUnfolderBase]: 430/1175 cut-off events. [2024-02-02 09:11:30,629 INFO L125 PetriNetUnfolderBase]: For 1835/1839 co-relation queries the response was YES. [2024-02-02 09:11:30,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2866 conditions, 1175 events. 430/1175 cut-off events. For 1835/1839 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7378 event pairs, 67 based on Foata normal form. 6/1174 useless extension candidates. Maximal degree in co-relation 2826. Up to 324 conditions per place. [2024-02-02 09:11:30,634 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 73 selfloop transitions, 22 changer transitions 0/113 dead transitions. [2024-02-02 09:11:30,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 113 transitions, 740 flow [2024-02-02 09:11:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:11:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:11:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 361 transitions. [2024-02-02 09:11:30,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570987654320988 [2024-02-02 09:11:30,636 INFO L175 Difference]: Start difference. First operand has 99 places, 72 transitions, 436 flow. Second operand 9 states and 361 transitions. [2024-02-02 09:11:30,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 113 transitions, 740 flow [2024-02-02 09:11:30,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 113 transitions, 684 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-02-02 09:11:30,642 INFO L231 Difference]: Finished difference. Result has 99 places, 71 transitions, 418 flow [2024-02-02 09:11:30,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=418, PETRI_PLACES=99, PETRI_TRANSITIONS=71} [2024-02-02 09:11:30,642 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2024-02-02 09:11:30,643 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 71 transitions, 418 flow [2024-02-02 09:11:30,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:30,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:30,643 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, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:30,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-02 09:11:30,643 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:30,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash -2018291636, now seen corresponding path program 3 times [2024-02-02 09:11:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:30,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744963804] [2024-02-02 09:11:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:30,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:30,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744963804] [2024-02-02 09:11:30,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744963804] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:30,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:30,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-02 09:11:30,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095604587] [2024-02-02 09:11:30,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:30,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-02 09:11:30,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:30,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-02 09:11:30,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-02 09:11:30,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 72 [2024-02-02 09:11:30,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 71 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 32.714285714285715) internal successors, (229), 7 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:30,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:30,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 72 [2024-02-02 09:11:30,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:31,033 INFO L124 PetriNetUnfolderBase]: 438/1174 cut-off events. [2024-02-02 09:11:31,033 INFO L125 PetriNetUnfolderBase]: For 1689/1703 co-relation queries the response was YES. [2024-02-02 09:11:31,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2901 conditions, 1174 events. 438/1174 cut-off events. For 1689/1703 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7191 event pairs, 123 based on Foata normal form. 10/1173 useless extension candidates. Maximal degree in co-relation 2643. Up to 342 conditions per place. [2024-02-02 09:11:31,041 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 90 selfloop transitions, 18 changer transitions 0/124 dead transitions. [2024-02-02 09:11:31,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 124 transitions, 785 flow [2024-02-02 09:11:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-02 09:11:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-02 09:11:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 329 transitions. [2024-02-02 09:11:31,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5711805555555556 [2024-02-02 09:11:31,043 INFO L175 Difference]: Start difference. First operand has 99 places, 71 transitions, 418 flow. Second operand 8 states and 329 transitions. [2024-02-02 09:11:31,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 124 transitions, 785 flow [2024-02-02 09:11:31,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 124 transitions, 731 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-02-02 09:11:31,049 INFO L231 Difference]: Finished difference. Result has 101 places, 73 transitions, 438 flow [2024-02-02 09:11:31,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=438, PETRI_PLACES=101, PETRI_TRANSITIONS=73} [2024-02-02 09:11:31,050 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 27 predicate places. [2024-02-02 09:11:31,050 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 73 transitions, 438 flow [2024-02-02 09:11:31,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.714285714285715) internal successors, (229), 7 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:31,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:31,051 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, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:31,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-02 09:11:31,051 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:31,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:31,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2091662366, now seen corresponding path program 4 times [2024-02-02 09:11:31,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:31,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111384957] [2024-02-02 09:11:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:31,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:31,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:31,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111384957] [2024-02-02 09:11:31,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111384957] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:31,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:31,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-02 09:11:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474190632] [2024-02-02 09:11:31,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:31,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-02 09:11:31,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:31,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-02 09:11:31,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-02-02 09:11:31,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-02-02 09:11:31,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 73 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 33.714285714285715) internal successors, (236), 7 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:31,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:31,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-02-02 09:11:31,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:31,427 INFO L124 PetriNetUnfolderBase]: 434/1166 cut-off events. [2024-02-02 09:11:31,427 INFO L125 PetriNetUnfolderBase]: For 1998/2012 co-relation queries the response was YES. [2024-02-02 09:11:31,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2872 conditions, 1166 events. 434/1166 cut-off events. For 1998/2012 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7158 event pairs, 95 based on Foata normal form. 10/1167 useless extension candidates. Maximal degree in co-relation 2624. Up to 342 conditions per place. [2024-02-02 09:11:31,433 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 75 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2024-02-02 09:11:31,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 112 transitions, 728 flow [2024-02-02 09:11:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:11:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:11:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 353 transitions. [2024-02-02 09:11:31,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447530864197531 [2024-02-02 09:11:31,435 INFO L175 Difference]: Start difference. First operand has 101 places, 73 transitions, 438 flow. Second operand 9 states and 353 transitions. [2024-02-02 09:11:31,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 112 transitions, 728 flow [2024-02-02 09:11:31,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 112 transitions, 689 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-02-02 09:11:31,440 INFO L231 Difference]: Finished difference. Result has 101 places, 72 transitions, 433 flow [2024-02-02 09:11:31,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=433, PETRI_PLACES=101, PETRI_TRANSITIONS=72} [2024-02-02 09:11:31,441 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 27 predicate places. [2024-02-02 09:11:31,441 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 72 transitions, 433 flow [2024-02-02 09:11:31,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.714285714285715) internal successors, (236), 7 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:31,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:31,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:31,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-02 09:11:31,441 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:31,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:31,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1639888506, now seen corresponding path program 1 times [2024-02-02 09:11:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:31,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762274163] [2024-02-02 09:11:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:31,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:31,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:31,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762274163] [2024-02-02 09:11:31,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762274163] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:31,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:31,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:11:31,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532497767] [2024-02-02 09:11:31,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:31,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:11:31,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:31,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:11:31,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:11:31,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 72 [2024-02-02 09:11:31,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 72 transitions, 433 flow. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:31,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:31,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 72 [2024-02-02 09:11:31,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:31,703 INFO L124 PetriNetUnfolderBase]: 283/902 cut-off events. [2024-02-02 09:11:31,703 INFO L125 PetriNetUnfolderBase]: For 1661/1665 co-relation queries the response was YES. [2024-02-02 09:11:31,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2177 conditions, 902 events. 283/902 cut-off events. For 1661/1665 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5743 event pairs, 127 based on Foata normal form. 2/875 useless extension candidates. Maximal degree in co-relation 2141. Up to 278 conditions per place. [2024-02-02 09:11:31,710 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 39 selfloop transitions, 5 changer transitions 28/94 dead transitions. [2024-02-02 09:11:31,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 94 transitions, 635 flow [2024-02-02 09:11:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:11:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:11:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2024-02-02 09:11:31,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-02-02 09:11:31,712 INFO L175 Difference]: Start difference. First operand has 101 places, 72 transitions, 433 flow. Second operand 5 states and 264 transitions. [2024-02-02 09:11:31,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 94 transitions, 635 flow [2024-02-02 09:11:31,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 94 transitions, 592 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-02-02 09:11:31,716 INFO L231 Difference]: Finished difference. Result has 99 places, 62 transitions, 300 flow [2024-02-02 09:11:31,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=99, PETRI_TRANSITIONS=62} [2024-02-02 09:11:31,717 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2024-02-02 09:11:31,717 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 62 transitions, 300 flow [2024-02-02 09:11:31,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:31,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:31,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:31,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-02-02 09:11:31,718 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-02 09:11:31,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:31,718 INFO L85 PathProgramCache]: Analyzing trace with hash 621926244, now seen corresponding path program 2 times [2024-02-02 09:11:31,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:31,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037348281] [2024-02-02 09:11:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:31,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:31,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:31,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037348281] [2024-02-02 09:11:31,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037348281] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:31,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:31,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:11:31,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621817992] [2024-02-02 09:11:31,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:31,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:11:31,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:31,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:11:31,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:11:31,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 72 [2024-02-02 09:11:31,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 62 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:31,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:31,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 72 [2024-02-02 09:11:31,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:31,964 INFO L124 PetriNetUnfolderBase]: 157/532 cut-off events. [2024-02-02 09:11:31,965 INFO L125 PetriNetUnfolderBase]: For 548/552 co-relation queries the response was YES. [2024-02-02 09:11:31,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 532 events. 157/532 cut-off events. For 548/552 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2826 event pairs, 55 based on Foata normal form. 4/511 useless extension candidates. Maximal degree in co-relation 1238. Up to 145 conditions per place. [2024-02-02 09:11:31,966 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 0 selfloop transitions, 0 changer transitions 67/67 dead transitions. [2024-02-02 09:11:31,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 67 transitions, 407 flow [2024-02-02 09:11:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:11:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:11:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-02-02 09:11:31,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-02-02 09:11:31,968 INFO L175 Difference]: Start difference. First operand has 99 places, 62 transitions, 300 flow. Second operand 5 states and 245 transitions. [2024-02-02 09:11:31,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 67 transitions, 407 flow [2024-02-02 09:11:31,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 67 transitions, 372 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-02 09:11:31,969 INFO L231 Difference]: Finished difference. Result has 87 places, 0 transitions, 0 flow [2024-02-02 09:11:31,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=87, PETRI_TRANSITIONS=0} [2024-02-02 09:11:31,970 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 13 predicate places. [2024-02-02 09:11:31,970 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 0 transitions, 0 flow [2024-02-02 09:11:31,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:11:31,972 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 36 remaining) [2024-02-02 09:11:31,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 36 remaining) [2024-02-02 09:11:31,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 36 remaining) [2024-02-02 09:11:31,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 36 remaining) [2024-02-02 09:11:31,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 36 remaining) [2024-02-02 09:11:31,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 36 remaining) [2024-02-02 09:11:31,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 36 remaining) [2024-02-02 09:11:31,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 36 remaining) [2024-02-02 09:11:31,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 36 remaining) [2024-02-02 09:11:31,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 36 remaining) [2024-02-02 09:11:31,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 36 remaining) [2024-02-02 09:11:31,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 36 remaining) [2024-02-02 09:11:31,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 36 remaining) [2024-02-02 09:11:31,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 36 remaining) [2024-02-02 09:11:31,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 36 remaining) [2024-02-02 09:11:31,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 36 remaining) [2024-02-02 09:11:31,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 36 remaining) [2024-02-02 09:11:31,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 36 remaining) [2024-02-02 09:11:31,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 36 remaining) [2024-02-02 09:11:31,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (16 of 36 remaining) [2024-02-02 09:11:31,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 36 remaining) [2024-02-02 09:11:31,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 36 remaining) [2024-02-02 09:11:31,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 36 remaining) [2024-02-02 09:11:31,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 36 remaining) [2024-02-02 09:11:31,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 36 remaining) [2024-02-02 09:11:31,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 36 remaining) [2024-02-02 09:11:31,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 36 remaining) [2024-02-02 09:11:31,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 36 remaining) [2024-02-02 09:11:31,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 36 remaining) [2024-02-02 09:11:31,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 36 remaining) [2024-02-02 09:11:31,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 36 remaining) [2024-02-02 09:11:31,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 36 remaining) [2024-02-02 09:11:31,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 36 remaining) [2024-02-02 09:11:31,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 36 remaining) [2024-02-02 09:11:31,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 36 remaining) [2024-02-02 09:11:31,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 36 remaining) [2024-02-02 09:11:31,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-02-02 09:11:31,978 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:31,983 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-02 09:11:31,984 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-02 09:11:31,987 INFO L503 ceAbstractionStarter]: Automizer considered 19 witness invariants [2024-02-02 09:11:31,987 INFO L504 ceAbstractionStarter]: WitnessConsidered=19 [2024-02-02 09:11:31,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 09:11:31 BasicIcfg [2024-02-02 09:11:31,987 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-02 09:11:31,988 INFO L158 Benchmark]: Toolchain (without parser) took 7969.33ms. Allocated memory was 174.1MB in the beginning and 360.7MB in the end (delta: 186.6MB). Free memory was 97.3MB in the beginning and 260.6MB in the end (delta: -163.2MB). Peak memory consumption was 24.1MB. Max. memory is 16.1GB. [2024-02-02 09:11:31,988 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 174.1MB. Free memory is still 128.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-02 09:11:31,988 INFO L158 Benchmark]: CDTParser took 0.07ms. Allocated memory is still 174.1MB. Free memory is still 144.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-02 09:11:31,988 INFO L158 Benchmark]: CACSL2BoogieTranslator took 585.32ms. Allocated memory is still 174.1MB. Free memory was 97.1MB in the beginning and 134.0MB in the end (delta: -36.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-02-02 09:11:31,989 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.17ms. Allocated memory is still 174.1MB. Free memory was 134.0MB in the beginning and 131.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-02 09:11:31,989 INFO L158 Benchmark]: Boogie Preprocessor took 62.98ms. Allocated memory is still 174.1MB. Free memory was 131.9MB in the beginning and 129.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-02 09:11:31,989 INFO L158 Benchmark]: RCFGBuilder took 471.69ms. Allocated memory is still 174.1MB. Free memory was 129.8MB in the beginning and 96.2MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-02-02 09:11:31,989 INFO L158 Benchmark]: TraceAbstraction took 6794.30ms. Allocated memory was 174.1MB in the beginning and 360.7MB in the end (delta: 186.6MB). Free memory was 95.6MB in the beginning and 260.6MB in the end (delta: -164.9MB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. [2024-02-02 09:11:31,990 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 174.1MB. Free memory is still 128.9MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.07ms. Allocated memory is still 174.1MB. Free memory is still 144.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 585.32ms. Allocated memory is still 174.1MB. Free memory was 97.1MB in the beginning and 134.0MB in the end (delta: -36.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.17ms. Allocated memory is still 174.1MB. Free memory was 134.0MB in the beginning and 131.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.98ms. Allocated memory is still 174.1MB. Free memory was 131.9MB in the beginning and 129.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 471.69ms. Allocated memory is still 174.1MB. Free memory was 129.8MB in the beginning and 96.2MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6794.30ms. Allocated memory was 174.1MB in the beginning and 360.7MB in the end (delta: 186.6MB). Free memory was 95.6MB in the beginning and 260.6MB in the end (delta: -164.9MB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 696]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 697]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 698]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 699]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 700]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 701]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 702]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 706]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 707]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 708]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 709]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 710]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 711]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 712]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 717]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 718]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 719]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 720]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 721]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 727]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 122 locations, 36 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.7s, OverallIterations: 21, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2471 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1863 mSDsluCounter, 265 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 163 mSDsCounter, 235 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4365 IncrementalHoareTripleChecker+Invalid, 4600 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 235 mSolverCounterUnsat, 102 mSDtfsCounter, 4365 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=438occurred in iteration=18, InterpolantAutomatonStates: 117, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 511 NumberOfCodeBlocks, 511 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 490 ConstructedInterpolants, 0 QuantifiedInterpolants, 3520 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 21 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 20 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-02 09:11:32,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE