./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 fced0e87 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/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-wip.fs.extract-columns-fced0e8-m [2024-01-31 16:00:53,080 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:00:53,127 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:00:53,130 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:00:53,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:00:53,152 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:00:53,152 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:00:53,153 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:00:53,153 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:00:53,156 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:00:53,156 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:00:53,157 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:00:53,157 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:00:53,158 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:00:53,159 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:00:53,159 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:00:53,159 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:00:53,159 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:00:53,159 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:00:53,160 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:00:53,160 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:00:53,160 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:00:53,160 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:00:53,160 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:00:53,161 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:00:53,161 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:00:53,161 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:00:53,161 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:00:53,162 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:00:53,162 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:00:53,163 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:00:53,163 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:00:53,163 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:00:53,163 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:00:53,163 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:00:53,164 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:00:53,164 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:00:53,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:00:53,164 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:00:53,164 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:00:53,164 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:00:53,165 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:00:53,165 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:00:53,165 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:00:53,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:00:53,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:00:53,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:00:53,399 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:00:53,400 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:00:53,401 INFO L431 ainManager$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 [2024-01-31 16:00:53,522 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:00:53,522 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:00:53,524 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stateful01-2.i [2024-01-31 16:00:54,690 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:00:54,986 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:00:54,992 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stateful01-2.i [2024-01-31 16:00:55,007 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3377e1952/387bb9a2c87a4635b22c0d7f5df23a61/FLAG4c57cdedf [2024-01-31 16:00:55,020 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3377e1952/387bb9a2c87a4635b22c0d7f5df23a61 [2024-01-31 16:00:55,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:00:55,022 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:00:55,024 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:00:55,024 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:00:55,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:00:55,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:00:53" (1/2) ... [2024-01-31 16:00:55,031 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64bb0cb1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:55, skipping insertion in model container [2024-01-31 16:00:55,031 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:00:53" (1/2) ... [2024-01-31 16:00:55,032 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1347565c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:00:55, skipping insertion in model container [2024-01-31 16:00:55,032 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:00:55" (2/2) ... [2024-01-31 16:00:55,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64bb0cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55, skipping insertion in model container [2024-01-31 16:00:55,033 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:00:55" (2/2) ... [2024-01-31 16:00:55,034 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:00:55,077 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:00:55,078 INFO L98 nessWitnessExtractor]: Location invariant before [L698-L698] (11 <= data1) && ((unsigned long )arg == 0UL) [2024-01-31 16:00:55,078 INFO L98 nessWitnessExtractor]: Location invariant before [L712-L712] (unsigned long )arg == 0UL [2024-01-31 16:00:55,079 INFO L98 nessWitnessExtractor]: Location invariant before [L717-L717] (data1 == 0) && (data2 == 0) [2024-01-31 16:00:55,079 INFO L98 nessWitnessExtractor]: Location invariant before [L708-L708] (15 <= data1) && ((unsigned long )arg == 0UL) [2024-01-31 16:00:55,079 INFO L98 nessWitnessExtractor]: Location invariant before [L721-L721] (data1 == 10) && (data2 == 10) [2024-01-31 16:00:55,079 INFO L98 nessWitnessExtractor]: Location invariant before [L697-L697] (10 <= data1) && ((unsigned long )arg == 0UL) [2024-01-31 16:00:55,079 INFO L98 nessWitnessExtractor]: Location invariant before [L709-L709] (unsigned long )arg == 0UL [2024-01-31 16:00:55,079 INFO L98 nessWitnessExtractor]: Location invariant before [L706-L706] (unsigned long )arg == 0UL [2024-01-31 16:00:55,079 INFO L98 nessWitnessExtractor]: Location invariant before [L711-L711] ((10 <= data1) && (data2 <= 2147483641)) && ((unsigned long )arg == 0UL) [2024-01-31 16:00:55,080 INFO L98 nessWitnessExtractor]: Location invariant before [L696-L696] (unsigned long )arg == 0UL [2024-01-31 16:00:55,080 INFO L98 nessWitnessExtractor]: Location invariant before [L700-L700] (10 <= data1) && ((unsigned long )arg == 0UL) [2024-01-31 16:00:55,080 INFO L98 nessWitnessExtractor]: Location invariant before [L701-L701] ((-2147483647 <= data2) && (10 <= data1)) && ((unsigned long )arg == 0UL) [2024-01-31 16:00:55,080 INFO L98 nessWitnessExtractor]: Location invariant before [L699-L699] (unsigned long )arg == 0UL [2024-01-31 16:00:55,080 INFO L98 nessWitnessExtractor]: Location invariant before [L702-L702] (unsigned long )arg == 0UL [2024-01-31 16:00:55,080 INFO L98 nessWitnessExtractor]: Location invariant before [L720-L720] (data1 == 10) && (data2 == 0) [2024-01-31 16:00:55,080 INFO L98 nessWitnessExtractor]: Location invariant before [L707-L707] (10 <= data1) && ((unsigned long )arg == 0UL) [2024-01-31 16:00:55,081 INFO L98 nessWitnessExtractor]: Location invariant before [L718-L718] (data1 == 0) && (data2 == 0) [2024-01-31 16:00:55,081 INFO L98 nessWitnessExtractor]: Location invariant before [L710-L710] (10 <= data1) && ((unsigned long )arg == 0UL) [2024-01-31 16:00:55,081 INFO L98 nessWitnessExtractor]: Location invariant before [L719-L719] (data1 == 0) && (data2 == 0) [2024-01-31 16:00:55,124 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:00:55,369 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] [2024-01-31 16:00:55,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:00:55,389 INFO L204 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 [2024-01-31 16:00:55,468 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] [2024-01-31 16:00:55,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:00:55,500 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:00:55,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55 WrapperNode [2024-01-31 16:00:55,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:00:55,501 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:00:55,502 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:00:55,502 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:00:55,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (1/1) ... [2024-01-31 16:00:55,532 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (1/1) ... [2024-01-31 16:00:55,558 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-01-31 16:00:55,559 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:00:55,560 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:00:55,560 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:00:55,561 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:00:55,569 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (1/1) ... [2024-01-31 16:00:55,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (1/1) ... [2024-01-31 16:00:55,586 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (1/1) ... [2024-01-31 16:00:55,609 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]. [2024-01-31 16:00:55,611 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (1/1) ... [2024-01-31 16:00:55,614 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (1/1) ... [2024-01-31 16:00:55,618 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (1/1) ... [2024-01-31 16:00:55,620 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (1/1) ... [2024-01-31 16:00:55,621 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (1/1) ... [2024-01-31 16:00:55,622 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (1/1) ... [2024-01-31 16:00:55,624 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:00:55,625 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:00:55,625 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:00:55,625 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:00:55,625 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (1/1) ... [2024-01-31 16:00:55,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:00:55,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:00:55,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:00:55,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:00:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:00:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:00:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:00:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:00:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 16:00:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:00:55,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:00:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:00:55,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:00:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:00:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:00:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:00:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:00:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 16:00:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:00:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:00:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:00:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:00:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:00:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:00:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:00:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:00:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 16:00:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:00:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:00:55,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:00:55,685 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:00:55,863 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:00:55,865 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:00:56,163 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:00:56,164 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:00:56,242 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:00:56,242 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-01-31 16:00:56,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:00:56 BoogieIcfgContainer [2024-01-31 16:00:56,243 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:00:56,244 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:00:56,244 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:00:56,247 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:00:56,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:00:53" (1/4) ... [2024-01-31 16:00:56,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539c84fa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:00:56, skipping insertion in model container [2024-01-31 16:00:56,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:00:55" (2/4) ... [2024-01-31 16:00:56,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539c84fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:00:56, skipping insertion in model container [2024-01-31 16:00:56,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:00:55" (3/4) ... [2024-01-31 16:00:56,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@539c84fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:00:56, skipping insertion in model container [2024-01-31 16:00:56,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:00:56" (4/4) ... [2024-01-31 16:00:56,249 INFO L112 eAbstractionObserver]: Analyzing ICFG stateful01-2.i [2024-01-31 16:00:56,262 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:00:56,262 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-01-31 16:00:56,263 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:00:56,318 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:00:56,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 72 transitions, 158 flow [2024-01-31 16:00:56,411 INFO L124 PetriNetUnfolderBase]: 1/70 cut-off events. [2024-01-31 16:00:56,411 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:00:56,414 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. [2024-01-31 16:00:56,414 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 72 transitions, 158 flow [2024-01-31 16:00:56,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 67 transitions, 146 flow [2024-01-31 16:00:56,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:00:56,437 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;@1ac4493f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:00:56,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2024-01-31 16:00:56,441 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:00:56,442 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:00:56,442 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:00:56,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:56,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:00:56,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:56,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:56,448 INFO L85 PathProgramCache]: Analyzing trace with hash 9449, now seen corresponding path program 1 times [2024-01-31 16:00:56,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:56,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929222680] [2024-01-31 16:00:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:56,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:56,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:56,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929222680] [2024-01-31 16:00:56,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929222680] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:56,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:56,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:00:56,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25799126] [2024-01-31 16:00:56,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:56,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:00:56,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:00:56,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:00:56,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 72 [2024-01-31 16:00:56,856 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) [2024-01-31 16:00:56,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:56,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 72 [2024-01-31 16:00:56,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:57,152 INFO L124 PetriNetUnfolderBase]: 297/777 cut-off events. [2024-01-31 16:00:57,153 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-01-31 16:00:57,158 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. [2024-01-31 16:00:57,164 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 29 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-01-31 16:00:57,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 64 transitions, 202 flow [2024-01-31 16:00:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:00:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:00:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2024-01-31 16:00:57,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2024-01-31 16:00:57,187 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 146 flow. Second operand 3 states and 139 transitions. [2024-01-31 16:00:57,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 64 transitions, 202 flow [2024-01-31 16:00:57,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 194 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:00:57,206 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 136 flow [2024-01-31 16:00:57,207 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} [2024-01-31 16:00:57,210 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2024-01-31 16:00:57,224 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 136 flow [2024-01-31 16:00:57,225 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) [2024-01-31 16:00:57,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:57,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:00:57,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:00:57,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:57,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:57,227 INFO L85 PathProgramCache]: Analyzing trace with hash 281774487, now seen corresponding path program 1 times [2024-01-31 16:00:57,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:57,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908524257] [2024-01-31 16:00:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:57,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:57,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908524257] [2024-01-31 16:00:57,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908524257] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:57,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:57,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:00:57,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909662412] [2024-01-31 16:00:57,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:57,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:00:57,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:57,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:00:57,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:00:57,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 72 [2024-01-31 16:00:57,435 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) [2024-01-31 16:00:57,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:57,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 72 [2024-01-31 16:00:57,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:57,545 INFO L124 PetriNetUnfolderBase]: 240/707 cut-off events. [2024-01-31 16:00:57,545 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-01-31 16:00:57,547 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. [2024-01-31 16:00:57,550 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 26 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-01-31 16:00:57,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 192 flow [2024-01-31 16:00:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:00:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:00:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 186 transitions. [2024-01-31 16:00:57,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-01-31 16:00:57,552 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 136 flow. Second operand 4 states and 186 transitions. [2024-01-31 16:00:57,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 192 flow [2024-01-31 16:00:57,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:00:57,554 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 136 flow [2024-01-31 16:00:57,554 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} [2024-01-31 16:00:57,555 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2024-01-31 16:00:57,555 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 136 flow [2024-01-31 16:00:57,555 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) [2024-01-31 16:00:57,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:57,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:00:57,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:00:57,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:57,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:57,556 INFO L85 PathProgramCache]: Analyzing trace with hash 145074782, now seen corresponding path program 1 times [2024-01-31 16:00:57,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:57,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275797910] [2024-01-31 16:00:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:57,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:57,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:57,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275797910] [2024-01-31 16:00:57,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275797910] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:57,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:57,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:00:57,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575436454] [2024-01-31 16:00:57,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:57,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:00:57,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:57,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:00:57,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:00:57,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 72 [2024-01-31 16:00:57,637 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) [2024-01-31 16:00:57,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:57,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 72 [2024-01-31 16:00:57,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:57,728 INFO L124 PetriNetUnfolderBase]: 240/703 cut-off events. [2024-01-31 16:00:57,728 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:00:57,731 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. [2024-01-31 16:00:57,734 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 32 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2024-01-31 16:00:57,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 221 flow [2024-01-31 16:00:57,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:00:57,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:00:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 193 transitions. [2024-01-31 16:00:57,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6701388888888888 [2024-01-31 16:00:57,739 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 136 flow. Second operand 4 states and 193 transitions. [2024-01-31 16:00:57,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 221 flow [2024-01-31 16:00:57,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 215 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 16:00:57,742 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 147 flow [2024-01-31 16:00:57,742 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} [2024-01-31 16:00:57,743 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2024-01-31 16:00:57,743 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 147 flow [2024-01-31 16:00:57,743 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) [2024-01-31 16:00:57,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:57,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:57,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:00:57,744 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:57,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:57,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1186100666, now seen corresponding path program 1 times [2024-01-31 16:00:57,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:57,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468415892] [2024-01-31 16:00:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:57,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:57,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:57,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468415892] [2024-01-31 16:00:57,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468415892] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:57,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:57,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:00:57,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751228200] [2024-01-31 16:00:57,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:57,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:00:57,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:00:57,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:00:57,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 72 [2024-01-31 16:00:57,906 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) [2024-01-31 16:00:57,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:57,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 72 [2024-01-31 16:00:57,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:58,008 INFO L124 PetriNetUnfolderBase]: 213/673 cut-off events. [2024-01-31 16:00:58,008 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-01-31 16:00:58,010 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. [2024-01-31 16:00:58,012 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 38 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-01-31 16:00:58,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 245 flow [2024-01-31 16:00:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:00:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:00:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2024-01-31 16:00:58,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6840277777777778 [2024-01-31 16:00:58,014 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 147 flow. Second operand 4 states and 197 transitions. [2024-01-31 16:00:58,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 245 flow [2024-01-31 16:00:58,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:00:58,016 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 140 flow [2024-01-31 16:00:58,016 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} [2024-01-31 16:00:58,017 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2024-01-31 16:00:58,017 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 140 flow [2024-01-31 16:00:58,017 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) [2024-01-31 16:00:58,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:58,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:58,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:00:58,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:58,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:58,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1675956508, now seen corresponding path program 1 times [2024-01-31 16:00:58,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:58,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955466421] [2024-01-31 16:00:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:58,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:58,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:58,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955466421] [2024-01-31 16:00:58,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955466421] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:58,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:58,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:00:58,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618685497] [2024-01-31 16:00:58,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:58,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:00:58,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:58,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:00:58,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:00:58,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 72 [2024-01-31 16:00:58,098 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) [2024-01-31 16:00:58,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:58,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 72 [2024-01-31 16:00:58,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:58,192 INFO L124 PetriNetUnfolderBase]: 213/640 cut-off events. [2024-01-31 16:00:58,192 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-01-31 16:00:58,193 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. [2024-01-31 16:00:58,195 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 45 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-01-31 16:00:58,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 75 transitions, 267 flow [2024-01-31 16:00:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:00:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:00:58,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2024-01-31 16:00:58,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-01-31 16:00:58,197 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 140 flow. Second operand 4 states and 204 transitions. [2024-01-31 16:00:58,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 75 transitions, 267 flow [2024-01-31 16:00:58,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:00:58,198 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 135 flow [2024-01-31 16:00:58,198 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} [2024-01-31 16:00:58,199 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -9 predicate places. [2024-01-31 16:00:58,199 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 135 flow [2024-01-31 16:00:58,199 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) [2024-01-31 16:00:58,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:58,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:58,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:00:58,200 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:58,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:58,200 INFO L85 PathProgramCache]: Analyzing trace with hash 429324338, now seen corresponding path program 1 times [2024-01-31 16:00:58,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:58,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095724910] [2024-01-31 16:00:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:58,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:58,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:58,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095724910] [2024-01-31 16:00:58,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095724910] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:58,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:58,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:00:58,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149889288] [2024-01-31 16:00:58,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:58,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:00:58,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:58,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:00:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:00:58,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-01-31 16:00:58,288 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) [2024-01-31 16:00:58,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:58,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-01-31 16:00:58,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:58,387 INFO L124 PetriNetUnfolderBase]: 387/889 cut-off events. [2024-01-31 16:00:58,387 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-01-31 16:00:58,388 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. [2024-01-31 16:00:58,391 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 46 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-01-31 16:00:58,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 68 transitions, 256 flow [2024-01-31 16:00:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:00:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:00:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 172 transitions. [2024-01-31 16:00:58,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-01-31 16:00:58,392 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 135 flow. Second operand 4 states and 172 transitions. [2024-01-31 16:00:58,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 68 transitions, 256 flow [2024-01-31 16:00:58,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:00:58,394 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 132 flow [2024-01-31 16:00:58,394 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} [2024-01-31 16:00:58,395 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -10 predicate places. [2024-01-31 16:00:58,395 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 132 flow [2024-01-31 16:00:58,395 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) [2024-01-31 16:00:58,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:58,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:58,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:00:58,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:58,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:58,396 INFO L85 PathProgramCache]: Analyzing trace with hash 424152925, now seen corresponding path program 1 times [2024-01-31 16:00:58,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:58,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592520476] [2024-01-31 16:00:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:58,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:58,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:58,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592520476] [2024-01-31 16:00:58,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592520476] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:58,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:58,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:00:58,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890944124] [2024-01-31 16:00:58,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:58,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:00:58,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:58,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:00:58,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:00:58,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-01-31 16:00:58,514 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) [2024-01-31 16:00:58,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:58,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-01-31 16:00:58,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:58,642 INFO L124 PetriNetUnfolderBase]: 431/987 cut-off events. [2024-01-31 16:00:58,642 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-01-31 16:00:58,643 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. [2024-01-31 16:00:58,647 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 55 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2024-01-31 16:00:58,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 308 flow [2024-01-31 16:00:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:00:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:00:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-01-31 16:00:58,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-01-31 16:00:58,648 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 132 flow. Second operand 5 states and 211 transitions. [2024-01-31 16:00:58,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 308 flow [2024-01-31 16:00:58,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 305 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:00:58,650 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 160 flow [2024-01-31 16:00:58,650 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} [2024-01-31 16:00:58,651 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-01-31 16:00:58,651 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 160 flow [2024-01-31 16:00:58,651 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) [2024-01-31 16:00:58,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:58,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:58,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:00:58,652 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:58,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash -574135609, now seen corresponding path program 1 times [2024-01-31 16:00:58,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:58,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920540279] [2024-01-31 16:00:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:58,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:58,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:58,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920540279] [2024-01-31 16:00:58,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920540279] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:58,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:58,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:00:58,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196032101] [2024-01-31 16:00:58,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:58,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:00:58,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:58,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:00:58,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:00:58,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-01-31 16:00:58,741 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) [2024-01-31 16:00:58,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:58,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-01-31 16:00:58,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:58,848 INFO L124 PetriNetUnfolderBase]: 441/984 cut-off events. [2024-01-31 16:00:58,849 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-01-31 16:00:58,850 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. [2024-01-31 16:00:58,854 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 49 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-01-31 16:00:58,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 288 flow [2024-01-31 16:00:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:00:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:00:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 172 transitions. [2024-01-31 16:00:58,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-01-31 16:00:58,855 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 160 flow. Second operand 4 states and 172 transitions. [2024-01-31 16:00:58,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 288 flow [2024-01-31 16:00:58,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:00:58,857 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 157 flow [2024-01-31 16:00:58,857 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} [2024-01-31 16:00:58,858 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -9 predicate places. [2024-01-31 16:00:58,858 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 157 flow [2024-01-31 16:00:58,858 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) [2024-01-31 16:00:58,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:58,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:00:58,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:00:58,859 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:58,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:58,859 INFO L85 PathProgramCache]: Analyzing trace with hash -618334337, now seen corresponding path program 1 times [2024-01-31 16:00:58,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:58,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672512805] [2024-01-31 16:00:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:58,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:58,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:58,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672512805] [2024-01-31 16:00:58,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672512805] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:58,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:58,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:00:58,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723966632] [2024-01-31 16:00:58,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:58,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:00:58,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:58,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:00:58,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:00:58,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-01-31 16:00:58,975 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) [2024-01-31 16:00:58,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:58,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-01-31 16:00:58,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:59,085 INFO L124 PetriNetUnfolderBase]: 441/960 cut-off events. [2024-01-31 16:00:59,086 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-01-31 16:00:59,090 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. [2024-01-31 16:00:59,093 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 57 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2024-01-31 16:00:59,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 332 flow [2024-01-31 16:00:59,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:00:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:00:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 209 transitions. [2024-01-31 16:00:59,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-01-31 16:00:59,095 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 157 flow. Second operand 5 states and 209 transitions. [2024-01-31 16:00:59,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 332 flow [2024-01-31 16:00:59,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 329 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:00:59,097 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 162 flow [2024-01-31 16:00:59,097 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} [2024-01-31 16:00:59,098 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-01-31 16:00:59,098 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 162 flow [2024-01-31 16:00:59,098 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) [2024-01-31 16:00:59,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:59,099 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] [2024-01-31 16:00:59,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:00:59,099 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:59,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:59,099 INFO L85 PathProgramCache]: Analyzing trace with hash 346957208, now seen corresponding path program 1 times [2024-01-31 16:00:59,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:59,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891366076] [2024-01-31 16:00:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:59,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:59,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:59,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891366076] [2024-01-31 16:00:59,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891366076] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:59,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:59,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:00:59,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055159899] [2024-01-31 16:00:59,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:59,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:00:59,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:59,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:00:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:00:59,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 72 [2024-01-31 16:00:59,276 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) [2024-01-31 16:00:59,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:59,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 72 [2024-01-31 16:00:59,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:59,421 INFO L124 PetriNetUnfolderBase]: 393/911 cut-off events. [2024-01-31 16:00:59,421 INFO L125 PetriNetUnfolderBase]: For 234/237 co-relation queries the response was YES. [2024-01-31 16:00:59,423 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. [2024-01-31 16:00:59,426 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 69 selfloop transitions, 11 changer transitions 0/96 dead transitions. [2024-01-31 16:00:59,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 429 flow [2024-01-31 16:00:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:00:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:00:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 253 transitions. [2024-01-31 16:00:59,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5856481481481481 [2024-01-31 16:00:59,428 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 162 flow. Second operand 6 states and 253 transitions. [2024-01-31 16:00:59,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 429 flow [2024-01-31 16:00:59,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 96 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 16:00:59,430 INFO L231 Difference]: Finished difference. Result has 72 places, 61 transitions, 222 flow [2024-01-31 16:00:59,430 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} [2024-01-31 16:00:59,430 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2024-01-31 16:00:59,431 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 61 transitions, 222 flow [2024-01-31 16:00:59,431 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) [2024-01-31 16:00:59,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:59,431 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] [2024-01-31 16:00:59,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:00:59,431 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:59,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:59,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1994266963, now seen corresponding path program 1 times [2024-01-31 16:00:59,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:59,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439396614] [2024-01-31 16:00:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:59,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:59,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:59,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439396614] [2024-01-31 16:00:59,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439396614] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:59,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:59,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:00:59,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365693065] [2024-01-31 16:00:59,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:59,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:00:59,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:59,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:00:59,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:00:59,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-01-31 16:00:59,586 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) [2024-01-31 16:00:59,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:59,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-01-31 16:00:59,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:59,739 INFO L124 PetriNetUnfolderBase]: 406/897 cut-off events. [2024-01-31 16:00:59,740 INFO L125 PetriNetUnfolderBase]: For 485/485 co-relation queries the response was YES. [2024-01-31 16:00:59,742 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. [2024-01-31 16:00:59,745 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 69 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2024-01-31 16:00:59,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 491 flow [2024-01-31 16:00:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:00:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:00:59,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 262 transitions. [2024-01-31 16:00:59,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-01-31 16:00:59,746 INFO L175 Difference]: Start difference. First operand has 72 places, 61 transitions, 222 flow. Second operand 6 states and 262 transitions. [2024-01-31 16:00:59,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 491 flow [2024-01-31 16:00:59,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:00:59,748 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 289 flow [2024-01-31 16:00:59,749 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} [2024-01-31 16:00:59,749 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2024-01-31 16:00:59,749 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 289 flow [2024-01-31 16:00:59,749 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) [2024-01-31 16:00:59,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:59,750 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] [2024-01-31 16:00:59,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:00:59,750 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:59,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2142017965, now seen corresponding path program 1 times [2024-01-31 16:00:59,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:59,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9891400] [2024-01-31 16:00:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:59,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:00:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:00:59,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:00:59,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9891400] [2024-01-31 16:00:59,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9891400] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:00:59,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:00:59,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:00:59,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179821163] [2024-01-31 16:00:59,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:00:59,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:00:59,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:00:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:00:59,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:00:59,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 72 [2024-01-31 16:00:59,823 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) [2024-01-31 16:00:59,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:00:59,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 72 [2024-01-31 16:00:59,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:00:59,905 INFO L124 PetriNetUnfolderBase]: 146/475 cut-off events. [2024-01-31 16:00:59,905 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-01-31 16:00:59,906 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. [2024-01-31 16:00:59,907 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 38 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-01-31 16:00:59,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 397 flow [2024-01-31 16:00:59,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:00:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:00:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2024-01-31 16:00:59,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7731481481481481 [2024-01-31 16:00:59,909 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 289 flow. Second operand 3 states and 167 transitions. [2024-01-31 16:00:59,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 397 flow [2024-01-31 16:00:59,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 373 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-31 16:00:59,913 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 281 flow [2024-01-31 16:00:59,913 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} [2024-01-31 16:00:59,914 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2024-01-31 16:00:59,915 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 281 flow [2024-01-31 16:00:59,915 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) [2024-01-31 16:00:59,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:00:59,915 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] [2024-01-31 16:00:59,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:00:59,915 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:00:59,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:00:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2032871053, now seen corresponding path program 1 times [2024-01-31 16:00:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:00:59,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650302054] [2024-01-31 16:00:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:00:59,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:00:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:00,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:00,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650302054] [2024-01-31 16:01:00,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650302054] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:00,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:00,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:01:00,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044870076] [2024-01-31 16:01:00,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:00,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:01:00,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:00,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:01:00,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:01:00,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-01-31 16:01:00,206 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) [2024-01-31 16:01:00,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:00,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-01-31 16:01:00,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:00,368 INFO L124 PetriNetUnfolderBase]: 278/727 cut-off events. [2024-01-31 16:01:00,369 INFO L125 PetriNetUnfolderBase]: For 430/432 co-relation queries the response was YES. [2024-01-31 16:01:00,371 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. [2024-01-31 16:01:00,373 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 78 selfloop transitions, 13 changer transitions 0/109 dead transitions. [2024-01-31 16:01:00,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 109 transitions, 606 flow [2024-01-31 16:01:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:01:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:01:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 302 transitions. [2024-01-31 16:01:00,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-01-31 16:01:00,375 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 281 flow. Second operand 7 states and 302 transitions. [2024-01-31 16:01:00,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 109 transitions, 606 flow [2024-01-31 16:01:00,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 109 transitions, 582 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:01:00,378 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 314 flow [2024-01-31 16:01:00,378 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} [2024-01-31 16:01:00,378 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2024-01-31 16:01:00,379 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 314 flow [2024-01-31 16:01:00,379 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) [2024-01-31 16:01:00,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:00,379 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] [2024-01-31 16:01:00,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:01:00,380 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:01:00,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash 713933860, now seen corresponding path program 1 times [2024-01-31 16:01:00,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:00,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025219803] [2024-01-31 16:01:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:00,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:00,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:00,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025219803] [2024-01-31 16:01:00,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025219803] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:00,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:00,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:01:00,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175546522] [2024-01-31 16:01:00,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:00,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:01:00,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:00,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:01:00,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:01:00,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 72 [2024-01-31 16:01:00,655 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) [2024-01-31 16:01:00,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:00,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 72 [2024-01-31 16:01:00,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:00,823 INFO L124 PetriNetUnfolderBase]: 347/963 cut-off events. [2024-01-31 16:01:00,823 INFO L125 PetriNetUnfolderBase]: For 827/841 co-relation queries the response was YES. [2024-01-31 16:01:00,826 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. [2024-01-31 16:01:00,829 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 92 selfloop transitions, 14 changer transitions 0/123 dead transitions. [2024-01-31 16:01:00,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 123 transitions, 698 flow [2024-01-31 16:01:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:01:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:01:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 301 transitions. [2024-01-31 16:01:00,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-01-31 16:01:00,830 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 314 flow. Second operand 7 states and 301 transitions. [2024-01-31 16:01:00,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 123 transitions, 698 flow [2024-01-31 16:01:00,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 123 transitions, 660 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-01-31 16:01:00,833 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 339 flow [2024-01-31 16:01:00,834 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} [2024-01-31 16:01:00,834 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-01-31 16:01:00,834 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 339 flow [2024-01-31 16:01:00,834 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) [2024-01-31 16:01:00,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:00,835 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] [2024-01-31 16:01:00,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 16:01:00,835 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:01:00,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:00,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1735046634, now seen corresponding path program 2 times [2024-01-31 16:01:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:00,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821169861] [2024-01-31 16:01:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:00,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:00,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:00,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821169861] [2024-01-31 16:01:00,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821169861] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:00,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:00,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:01:00,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678937670] [2024-01-31 16:01:00,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:00,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:01:00,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:00,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:01:00,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:01:01,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 72 [2024-01-31 16:01:01,068 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) [2024-01-31 16:01:01,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:01,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 72 [2024-01-31 16:01:01,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:01,253 INFO L124 PetriNetUnfolderBase]: 373/1031 cut-off events. [2024-01-31 16:01:01,254 INFO L125 PetriNetUnfolderBase]: For 924/938 co-relation queries the response was YES. [2024-01-31 16:01:01,256 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. [2024-01-31 16:01:01,259 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 85 selfloop transitions, 15 changer transitions 0/117 dead transitions. [2024-01-31 16:01:01,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 117 transitions, 670 flow [2024-01-31 16:01:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:01:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:01:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 295 transitions. [2024-01-31 16:01:01,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853174603174603 [2024-01-31 16:01:01,261 INFO L175 Difference]: Start difference. First operand has 88 places, 69 transitions, 339 flow. Second operand 7 states and 295 transitions. [2024-01-31 16:01:01,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 117 transitions, 670 flow [2024-01-31 16:01:01,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 117 transitions, 662 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:01:01,265 INFO L231 Difference]: Finished difference. Result has 94 places, 70 transitions, 381 flow [2024-01-31 16:01:01,265 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} [2024-01-31 16:01:01,265 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 20 predicate places. [2024-01-31 16:01:01,266 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 70 transitions, 381 flow [2024-01-31 16:01:01,266 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) [2024-01-31 16:01:01,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:01,266 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] [2024-01-31 16:01:01,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-31 16:01:01,266 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:01:01,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:01,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1403748165, now seen corresponding path program 2 times [2024-01-31 16:01:01,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:01,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984533608] [2024-01-31 16:01:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:01,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:01,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:01,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984533608] [2024-01-31 16:01:01,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984533608] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:01,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:01,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:01:01,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472253189] [2024-01-31 16:01:01,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:01,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:01:01,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:01,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:01:01,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:01:01,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-01-31 16:01:01,427 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) [2024-01-31 16:01:01,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:01,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-01-31 16:01:01,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:01,680 INFO L124 PetriNetUnfolderBase]: 436/1185 cut-off events. [2024-01-31 16:01:01,680 INFO L125 PetriNetUnfolderBase]: For 1455/1459 co-relation queries the response was YES. [2024-01-31 16:01:01,683 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. [2024-01-31 16:01:01,686 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 86 selfloop transitions, 19 changer transitions 0/123 dead transitions. [2024-01-31 16:01:01,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 123 transitions, 759 flow [2024-01-31 16:01:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:01:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:01:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 342 transitions. [2024-01-31 16:01:01,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-01-31 16:01:01,688 INFO L175 Difference]: Start difference. First operand has 94 places, 70 transitions, 381 flow. Second operand 8 states and 342 transitions. [2024-01-31 16:01:01,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 123 transitions, 759 flow [2024-01-31 16:01:01,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 123 transitions, 730 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-01-31 16:01:01,693 INFO L231 Difference]: Finished difference. Result has 99 places, 72 transitions, 436 flow [2024-01-31 16:01:01,693 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} [2024-01-31 16:01:01,694 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2024-01-31 16:01:01,694 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 72 transitions, 436 flow [2024-01-31 16:01:01,694 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) [2024-01-31 16:01:01,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:01,695 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] [2024-01-31 16:01:01,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-31 16:01:01,695 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:01:01,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:01,695 INFO L85 PathProgramCache]: Analyzing trace with hash -647895063, now seen corresponding path program 3 times [2024-01-31 16:01:01,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:01,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868676845] [2024-01-31 16:01:01,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:01,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:01,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:01,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868676845] [2024-01-31 16:01:01,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868676845] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:01,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:01,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:01:01,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315061570] [2024-01-31 16:01:01,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:01,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:01:01,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:01,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:01:01,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:01:01,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 72 [2024-01-31 16:01:01,916 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) [2024-01-31 16:01:01,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:01,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 72 [2024-01-31 16:01:01,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:02,238 INFO L124 PetriNetUnfolderBase]: 430/1175 cut-off events. [2024-01-31 16:01:02,248 INFO L125 PetriNetUnfolderBase]: For 1835/1839 co-relation queries the response was YES. [2024-01-31 16:01:02,251 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. [2024-01-31 16:01:02,255 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 73 selfloop transitions, 22 changer transitions 0/113 dead transitions. [2024-01-31 16:01:02,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 113 transitions, 740 flow [2024-01-31 16:01:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:01:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:01:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 361 transitions. [2024-01-31 16:01:02,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570987654320988 [2024-01-31 16:01:02,256 INFO L175 Difference]: Start difference. First operand has 99 places, 72 transitions, 436 flow. Second operand 9 states and 361 transitions. [2024-01-31 16:01:02,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 113 transitions, 740 flow [2024-01-31 16:01:02,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 113 transitions, 684 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-01-31 16:01:02,262 INFO L231 Difference]: Finished difference. Result has 99 places, 71 transitions, 418 flow [2024-01-31 16:01:02,276 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} [2024-01-31 16:01:02,276 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2024-01-31 16:01:02,276 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 71 transitions, 418 flow [2024-01-31 16:01:02,277 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) [2024-01-31 16:01:02,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:02,277 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] [2024-01-31 16:01:02,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-01-31 16:01:02,277 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:01:02,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:02,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2018291636, now seen corresponding path program 3 times [2024-01-31 16:01:02,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:02,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917584730] [2024-01-31 16:01:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:02,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:02,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:02,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917584730] [2024-01-31 16:01:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917584730] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:02,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:02,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:01:02,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930919826] [2024-01-31 16:01:02,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:02,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:01:02,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:02,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:01:02,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:01:02,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 72 [2024-01-31 16:01:02,611 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) [2024-01-31 16:01:02,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:02,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 72 [2024-01-31 16:01:02,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:02,898 INFO L124 PetriNetUnfolderBase]: 438/1174 cut-off events. [2024-01-31 16:01:02,899 INFO L125 PetriNetUnfolderBase]: For 1689/1703 co-relation queries the response was YES. [2024-01-31 16:01:02,902 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. [2024-01-31 16:01:02,908 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 90 selfloop transitions, 18 changer transitions 0/124 dead transitions. [2024-01-31 16:01:02,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 124 transitions, 785 flow [2024-01-31 16:01:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:01:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:01:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 329 transitions. [2024-01-31 16:01:02,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5711805555555556 [2024-01-31 16:01:02,910 INFO L175 Difference]: Start difference. First operand has 99 places, 71 transitions, 418 flow. Second operand 8 states and 329 transitions. [2024-01-31 16:01:02,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 124 transitions, 785 flow [2024-01-31 16:01:02,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 124 transitions, 731 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-01-31 16:01:02,917 INFO L231 Difference]: Finished difference. Result has 101 places, 73 transitions, 438 flow [2024-01-31 16:01:02,917 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} [2024-01-31 16:01:02,918 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 27 predicate places. [2024-01-31 16:01:02,918 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 73 transitions, 438 flow [2024-01-31 16:01:02,918 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) [2024-01-31 16:01:02,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:02,919 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] [2024-01-31 16:01:02,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-01-31 16:01:02,919 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:01:02,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:02,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2091662366, now seen corresponding path program 4 times [2024-01-31 16:01:02,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:02,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378535603] [2024-01-31 16:01:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:02,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:03,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:03,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378535603] [2024-01-31 16:01:03,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378535603] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:03,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:03,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:01:03,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377901275] [2024-01-31 16:01:03,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:03,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:01:03,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:01:03,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:01:03,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-01-31 16:01:03,097 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) [2024-01-31 16:01:03,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:03,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-01-31 16:01:03,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:03,318 INFO L124 PetriNetUnfolderBase]: 434/1166 cut-off events. [2024-01-31 16:01:03,318 INFO L125 PetriNetUnfolderBase]: For 1998/2012 co-relation queries the response was YES. [2024-01-31 16:01:03,322 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. [2024-01-31 16:01:03,325 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 75 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2024-01-31 16:01:03,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 112 transitions, 728 flow [2024-01-31 16:01:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:01:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:01:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 353 transitions. [2024-01-31 16:01:03,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447530864197531 [2024-01-31 16:01:03,328 INFO L175 Difference]: Start difference. First operand has 101 places, 73 transitions, 438 flow. Second operand 9 states and 353 transitions. [2024-01-31 16:01:03,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 112 transitions, 728 flow [2024-01-31 16:01:03,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 112 transitions, 689 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-01-31 16:01:03,336 INFO L231 Difference]: Finished difference. Result has 101 places, 72 transitions, 433 flow [2024-01-31 16:01:03,336 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} [2024-01-31 16:01:03,336 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 27 predicate places. [2024-01-31 16:01:03,362 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 72 transitions, 433 flow [2024-01-31 16:01:03,362 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) [2024-01-31 16:01:03,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:03,363 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] [2024-01-31 16:01:03,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-01-31 16:01:03,363 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:01:03,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:03,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1639888506, now seen corresponding path program 1 times [2024-01-31 16:01:03,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:03,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652471335] [2024-01-31 16:01:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:03,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:03,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:03,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652471335] [2024-01-31 16:01:03,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652471335] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:03,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:03,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:01:03,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916722961] [2024-01-31 16:01:03,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:03,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:01:03,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:03,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:01:03,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:01:03,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 72 [2024-01-31 16:01:03,490 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) [2024-01-31 16:01:03,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:03,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 72 [2024-01-31 16:01:03,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:03,605 INFO L124 PetriNetUnfolderBase]: 283/902 cut-off events. [2024-01-31 16:01:03,605 INFO L125 PetriNetUnfolderBase]: For 1661/1665 co-relation queries the response was YES. [2024-01-31 16:01:03,607 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. [2024-01-31 16:01:03,609 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 39 selfloop transitions, 5 changer transitions 28/94 dead transitions. [2024-01-31 16:01:03,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 94 transitions, 635 flow [2024-01-31 16:01:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:01:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:01:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 264 transitions. [2024-01-31 16:01:03,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-01-31 16:01:03,611 INFO L175 Difference]: Start difference. First operand has 101 places, 72 transitions, 433 flow. Second operand 5 states and 264 transitions. [2024-01-31 16:01:03,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 94 transitions, 635 flow [2024-01-31 16:01:03,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 94 transitions, 592 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-01-31 16:01:03,616 INFO L231 Difference]: Finished difference. Result has 99 places, 62 transitions, 300 flow [2024-01-31 16:01:03,616 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} [2024-01-31 16:01:03,617 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2024-01-31 16:01:03,617 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 62 transitions, 300 flow [2024-01-31 16:01:03,617 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) [2024-01-31 16:01:03,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:03,617 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] [2024-01-31 16:01:03,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-01-31 16:01:03,618 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-01-31 16:01:03,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:03,618 INFO L85 PathProgramCache]: Analyzing trace with hash 621926244, now seen corresponding path program 2 times [2024-01-31 16:01:03,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:03,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24513366] [2024-01-31 16:01:03,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:03,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:03,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:03,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24513366] [2024-01-31 16:01:03,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24513366] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:03,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:03,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:01:03,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826456901] [2024-01-31 16:01:03,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:03,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:01:03,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:03,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:01:03,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:01:03,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 72 [2024-01-31 16:01:03,761 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) [2024-01-31 16:01:03,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:03,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 72 [2024-01-31 16:01:03,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:03,872 INFO L124 PetriNetUnfolderBase]: 157/532 cut-off events. [2024-01-31 16:01:03,872 INFO L125 PetriNetUnfolderBase]: For 548/552 co-relation queries the response was YES. [2024-01-31 16:01:03,874 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. [2024-01-31 16:01:03,874 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 0 selfloop transitions, 0 changer transitions 67/67 dead transitions. [2024-01-31 16:01:03,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 67 transitions, 407 flow [2024-01-31 16:01:03,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:01:03,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:01:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-01-31 16:01:03,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-01-31 16:01:03,877 INFO L175 Difference]: Start difference. First operand has 99 places, 62 transitions, 300 flow. Second operand 5 states and 245 transitions. [2024-01-31 16:01:03,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 67 transitions, 407 flow [2024-01-31 16:01:03,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 67 transitions, 372 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 16:01:03,878 INFO L231 Difference]: Finished difference. Result has 87 places, 0 transitions, 0 flow [2024-01-31 16:01:03,879 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} [2024-01-31 16:01:03,879 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 13 predicate places. [2024-01-31 16:01:03,879 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 0 transitions, 0 flow [2024-01-31 16:01:03,879 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) [2024-01-31 16:01:03,881 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 36 remaining) [2024-01-31 16:01:03,881 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 36 remaining) [2024-01-31 16:01:03,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (16 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 36 remaining) [2024-01-31 16:01:03,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 36 remaining) [2024-01-31 16:01:03,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 36 remaining) [2024-01-31 16:01:03,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 36 remaining) [2024-01-31 16:01:03,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 36 remaining) [2024-01-31 16:01:03,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 36 remaining) [2024-01-31 16:01:03,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 36 remaining) [2024-01-31 16:01:03,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 36 remaining) [2024-01-31 16:01:03,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 36 remaining) [2024-01-31 16:01:03,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-01-31 16:01:03,884 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:01:03,889 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-31 16:01:03,889 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-31 16:01:03,908 INFO L503 ceAbstractionStarter]: Automizer considered 19 witness invariants [2024-01-31 16:01:03,908 INFO L504 ceAbstractionStarter]: WitnessConsidered=19 [2024-01-31 16:01:03,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 04:01:03 BasicIcfg [2024-01-31 16:01:03,912 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-31 16:01:03,913 INFO L158 Benchmark]: Toolchain (without parser) took 8891.09ms. Allocated memory was 159.4MB in the beginning and 243.3MB in the end (delta: 83.9MB). Free memory was 126.7MB in the beginning and 179.1MB in the end (delta: -52.4MB). Peak memory consumption was 145.7MB. Max. memory is 16.1GB. [2024-01-31 16:01:03,913 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 125.8MB. Free memory is still 85.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 16:01:03,913 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 125.8MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 16:01:03,914 INFO L158 Benchmark]: CACSL2BoogieTranslator took 476.39ms. Allocated memory is still 159.4MB. Free memory was 126.7MB in the beginning and 98.4MB in the end (delta: 28.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-01-31 16:01:03,914 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.43ms. Allocated memory is still 159.4MB. Free memory was 98.4MB in the beginning and 96.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-31 16:01:03,914 INFO L158 Benchmark]: Boogie Preprocessor took 64.55ms. Allocated memory is still 159.4MB. Free memory was 96.2MB in the beginning and 93.3MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-31 16:01:03,914 INFO L158 Benchmark]: RCFGBuilder took 618.52ms. Allocated memory is still 159.4MB. Free memory was 93.3MB in the beginning and 59.7MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-01-31 16:01:03,915 INFO L158 Benchmark]: TraceAbstraction took 7668.26ms. Allocated memory was 159.4MB in the beginning and 243.3MB in the end (delta: 83.9MB). Free memory was 59.7MB in the beginning and 179.1MB in the end (delta: -119.4MB). Peak memory consumption was 78.6MB. Max. memory is 16.1GB. [2024-01-31 16:01:03,916 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 125.8MB. Free memory is still 85.1MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 125.8MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 476.39ms. Allocated memory is still 159.4MB. Free memory was 126.7MB in the beginning and 98.4MB in the end (delta: 28.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.43ms. Allocated memory is still 159.4MB. Free memory was 98.4MB in the beginning and 96.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.55ms. Allocated memory is still 159.4MB. Free memory was 96.2MB in the beginning and 93.3MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 618.52ms. Allocated memory is still 159.4MB. Free memory was 93.3MB in the beginning and 59.7MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * TraceAbstraction took 7668.26ms. Allocated memory was 159.4MB in the beginning and 243.3MB in the end (delta: 83.9MB). Free memory was 59.7MB in the beginning and 179.1MB in the end (delta: -119.4MB). Peak memory consumption was 78.6MB. 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: 7.5s, OverallIterations: 21, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2471 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1863 mSDsluCounter, 265 SdHoareTripleChecker+Invalid, 2.4s 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: 0.0s SsaConstructionTime, 0.2s 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! [2024-01-31 16:01:03,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE