./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.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/40_barrier_vf-pthread.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-ext/40_barrier_vf-pthread.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/40_barrier_vf-pthread.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 16:13:26,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:13:26,828 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:13:26,832 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:13:26,832 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:13:26,867 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:13:26,868 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:13:26,868 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:13:26,869 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:13:26,873 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:13:26,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:13:26,873 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:13:26,874 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:13:26,875 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:13:26,876 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:13:26,876 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:13:26,876 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:13:26,877 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:13:26,877 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:13:26,877 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:13:26,877 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:13:26,878 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:13:26,878 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:13:26,878 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:13:26,879 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:13:26,879 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:13:26,879 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:13:26,879 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:13:26,880 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:13:26,880 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:13:26,881 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:13:26,881 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:13:26,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:13:26,882 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:13:26,882 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:13:26,882 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:13:26,882 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:13:26,883 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:13:26,883 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:13:26,883 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:13:26,883 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:13:26,888 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:13:26,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:13:26,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:13:27,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:13:27,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:13:27,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:13:27,153 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:13:27,153 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:13:27,154 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2024-01-31 16:13:28,392 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:13:28,638 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:13:28,638 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2024-01-31 16:13:28,648 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de80fe7a6/358bebffc328411eb94c14352333d9b2/FLAG6003c683a [2024-01-31 16:13:28,658 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de80fe7a6/358bebffc328411eb94c14352333d9b2 [2024-01-31 16:13:28,660 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:13:28,660 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:13:28,661 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/40_barrier_vf-pthread.yml/witness.yml [2024-01-31 16:13:28,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:13:28,739 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:13:28,741 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:13:28,741 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:13:28,745 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:13:28,745 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:13:28" (1/2) ... [2024-01-31 16:13:28,748 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b1785c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:28, skipping insertion in model container [2024-01-31 16:13:28,749 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:13:28" (1/2) ... [2024-01-31 16:13:28,751 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34b08118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:28, skipping insertion in model container [2024-01-31 16:13:28,751 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:13:28" (2/2) ... [2024-01-31 16:13:28,751 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b1785c3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:28, skipping insertion in model container [2024-01-31 16:13:28,752 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:13:28" (2/2) ... [2024-01-31 16:13:28,752 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:13:28,792 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:13:28,793 INFO L98 nessWitnessExtractor]: Loop invariant at [L699-L699] COND == (_Bool)0 || COND == (_Bool)1 [2024-01-31 16:13:28,794 INFO L98 nessWitnessExtractor]: Location invariant before [L694-L694] COND == (_Bool)0 || COND == (_Bool)1 [2024-01-31 16:13:28,794 INFO L98 nessWitnessExtractor]: Location invariant before [L704-L704] (unsigned long )arg == 0UL [2024-01-31 16:13:28,794 INFO L98 nessWitnessExtractor]: Location invariant before [L700-L700] COND == (_Bool)0 [2024-01-31 16:13:28,794 INFO L98 nessWitnessExtractor]: Location invariant before [L696-L696] (COND == (_Bool)1) && ((unsigned int )count == 3U) [2024-01-31 16:13:28,795 INFO L98 nessWitnessExtractor]: Location invariant before [L701-L701] COND == (_Bool)1 [2024-01-31 16:13:28,795 INFO L98 nessWitnessExtractor]: Location invariant before [L693-L693] COND == (_Bool)0 || COND == (_Bool)1 [2024-01-31 16:13:28,795 INFO L98 nessWitnessExtractor]: Location invariant before [L703-L703] (unsigned long )arg == 0UL [2024-01-31 16:13:28,796 INFO L98 nessWitnessExtractor]: Location invariant before [L695-L695] ((unsigned int )count == 3U) && (COND == (_Bool)0 || COND == (_Bool)1) [2024-01-31 16:13:28,796 INFO L98 nessWitnessExtractor]: Location invariant before [L704-L704] (unsigned long )arg == 0UL [2024-01-31 16:13:28,796 INFO L98 nessWitnessExtractor]: Location invariant after [L704-L704] (unsigned long )arg == 0UL [2024-01-31 16:13:28,796 INFO L98 nessWitnessExtractor]: Location invariant before [L697-L697] (COND == (_Bool)1) && ((unsigned int )count == 3U) [2024-01-31 16:13:28,845 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:13:29,132 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-ext/40_barrier_vf-pthread.i[30842,30855] [2024-01-31 16:13:29,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:13:29,153 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 [2024-01-31 16:13:29,233 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-ext/40_barrier_vf-pthread.i[30842,30855] Start Parsing Local [2024-01-31 16:13:29,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:13:29,267 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:13:29,268 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29 WrapperNode [2024-01-31 16:13:29,268 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:13:29,269 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:13:29,269 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:13:29,270 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:13:29,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (1/1) ... [2024-01-31 16:13:29,287 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (1/1) ... [2024-01-31 16:13:29,321 INFO L138 Inliner]: procedures = 165, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2024-01-31 16:13:29,321 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:13:29,322 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:13:29,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:13:29,323 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:13:29,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (1/1) ... [2024-01-31 16:13:29,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (1/1) ... [2024-01-31 16:13:29,337 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (1/1) ... [2024-01-31 16:13:29,353 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 5, 10, 1]. 56 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 10, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-01-31 16:13:29,354 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (1/1) ... [2024-01-31 16:13:29,354 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (1/1) ... [2024-01-31 16:13:29,358 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (1/1) ... [2024-01-31 16:13:29,362 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (1/1) ... [2024-01-31 16:13:29,363 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (1/1) ... [2024-01-31 16:13:29,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (1/1) ... [2024-01-31 16:13:29,366 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:13:29,367 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:13:29,367 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:13:29,367 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:13:29,368 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (1/1) ... [2024-01-31 16:13:29,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:13:29,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:13:29,440 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 16:13:29,451 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 16:13:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-31 16:13:29,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-31 16:13:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:13:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:13:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:13:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:13:29,469 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:13:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:13:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:13:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:13:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:13:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:13:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:13:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:13:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:13:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:13:29,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:13:29,472 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 16:13:29,593 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:13:29,594 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:13:29,757 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:13:29,758 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:13:29,931 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:13:29,932 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 16:13:29,934 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:13:29 BoogieIcfgContainer [2024-01-31 16:13:29,934 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:13:29,937 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:13:29,937 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:13:29,940 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:13:29,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:13:28" (1/4) ... [2024-01-31 16:13:29,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3cbf1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:13:29, skipping insertion in model container [2024-01-31 16:13:29,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:13:28" (2/4) ... [2024-01-31 16:13:29,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3cbf1b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:13:29, skipping insertion in model container [2024-01-31 16:13:29,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:13:29" (3/4) ... [2024-01-31 16:13:29,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3cbf1b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:13:29, skipping insertion in model container [2024-01-31 16:13:29,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:13:29" (4/4) ... [2024-01-31 16:13:29,943 INFO L112 eAbstractionObserver]: Analyzing ICFG 40_barrier_vf-pthread.i [2024-01-31 16:13:29,959 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:13:29,959 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-01-31 16:13:29,959 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:13:30,024 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:13:30,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 44 transitions, 92 flow [2024-01-31 16:13:30,114 INFO L124 PetriNetUnfolderBase]: 4/46 cut-off events. [2024-01-31 16:13:30,114 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:13:30,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 46 events. 4/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 72 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 41. Up to 3 conditions per place. [2024-01-31 16:13:30,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 44 transitions, 92 flow [2024-01-31 16:13:30,122 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 44 transitions, 92 flow [2024-01-31 16:13:30,137 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:13:30,144 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;@6c0a976c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:13:30,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-01-31 16:13:30,152 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:13:30,152 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-01-31 16:13:30,152 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:13:30,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:30,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:13:30,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-01-31 16:13:30,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:30,158 INFO L85 PathProgramCache]: Analyzing trace with hash 236594894, now seen corresponding path program 1 times [2024-01-31 16:13:30,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:30,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033728002] [2024-01-31 16:13:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:30,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:13:30,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:30,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033728002] [2024-01-31 16:13:30,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033728002] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:13:30,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:13:30,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:13:30,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963096884] [2024-01-31 16:13:30,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:13:30,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:13:30,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:30,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:13:30,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:13:30,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 44 [2024-01-31 16:13:30,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:13:30,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:30,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 44 [2024-01-31 16:13:30,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:30,699 INFO L124 PetriNetUnfolderBase]: 22/115 cut-off events. [2024-01-31 16:13:30,699 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:13:30,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 115 events. 22/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 422 event pairs, 0 based on Foata normal form. 12/106 useless extension candidates. Maximal degree in co-relation 159. Up to 46 conditions per place. [2024-01-31 16:13:30,725 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 15 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-01-31 16:13:30,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 116 flow [2024-01-31 16:13:30,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:13:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:13:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-01-31 16:13:30,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2024-01-31 16:13:30,738 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 4 states and 114 transitions. [2024-01-31 16:13:30,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 116 flow [2024-01-31 16:13:30,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:13:30,742 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 80 flow [2024-01-31 16:13:30,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-01-31 16:13:30,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2024-01-31 16:13:30,747 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 80 flow [2024-01-31 16:13:30,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:13:30,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:30,748 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-31 16:13:30,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:13:30,749 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-01-31 16:13:30,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1255523799, now seen corresponding path program 1 times [2024-01-31 16:13:30,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:30,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067339106] [2024-01-31 16:13:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:30,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:13:30,768 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:13:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:13:30,793 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:13:30,793 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:13:30,795 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2024-01-31 16:13:30,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 25 remaining) [2024-01-31 16:13:30,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 25 remaining) [2024-01-31 16:13:30,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 25 remaining) [2024-01-31 16:13:30,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 25 remaining) [2024-01-31 16:13:30,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 25 remaining) [2024-01-31 16:13:30,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 25 remaining) [2024-01-31 16:13:30,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 25 remaining) [2024-01-31 16:13:30,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 25 remaining) [2024-01-31 16:13:30,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 25 remaining) [2024-01-31 16:13:30,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 25 remaining) [2024-01-31 16:13:30,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 25 remaining) [2024-01-31 16:13:30,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (12 of 25 remaining) [2024-01-31 16:13:30,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 25 remaining) [2024-01-31 16:13:30,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 25 remaining) [2024-01-31 16:13:30,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 25 remaining) [2024-01-31 16:13:30,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 25 remaining) [2024-01-31 16:13:30,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 25 remaining) [2024-01-31 16:13:30,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 25 remaining) [2024-01-31 16:13:30,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 25 remaining) [2024-01-31 16:13:30,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 25 remaining) [2024-01-31 16:13:30,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 25 remaining) [2024-01-31 16:13:30,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 25 remaining) [2024-01-31 16:13:30,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 25 remaining) [2024-01-31 16:13:30,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (0 of 25 remaining) [2024-01-31 16:13:30,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:13:30,803 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-31 16:13:30,806 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:13:30,806 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-31 16:13:30,835 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:13:30,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 83 transitions, 176 flow [2024-01-31 16:13:30,869 INFO L124 PetriNetUnfolderBase]: 8/88 cut-off events. [2024-01-31 16:13:30,869 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:13:30,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 88 events. 8/88 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 266 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 79. Up to 3 conditions per place. [2024-01-31 16:13:30,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 83 transitions, 176 flow [2024-01-31 16:13:30,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 83 transitions, 176 flow [2024-01-31 16:13:30,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:13:30,879 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;@6c0a976c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:13:30,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2024-01-31 16:13:30,882 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:13:30,882 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-01-31 16:13:30,882 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:13:30,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:30,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:13:30,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-01-31 16:13:30,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:30,884 INFO L85 PathProgramCache]: Analyzing trace with hash 315839943, now seen corresponding path program 1 times [2024-01-31 16:13:30,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:30,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012582916] [2024-01-31 16:13:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:30,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:13:30,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:30,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012582916] [2024-01-31 16:13:30,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012582916] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:13:30,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:13:30,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:13:30,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931784598] [2024-01-31 16:13:30,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:13:30,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:13:30,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:30,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:13:30,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:13:30,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 83 [2024-01-31 16:13:30,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 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 16:13:30,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:30,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 83 [2024-01-31 16:13:30,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:31,245 INFO L124 PetriNetUnfolderBase]: 578/1733 cut-off events. [2024-01-31 16:13:31,246 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-01-31 16:13:31,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 1733 events. 578/1733 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 13409 event pairs, 56 based on Foata normal form. 234/1585 useless extension candidates. Maximal degree in co-relation 2401. Up to 804 conditions per place. [2024-01-31 16:13:31,258 INFO L140 encePairwiseOnDemand]: 71/83 looper letters, 35 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2024-01-31 16:13:31,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 257 flow [2024-01-31 16:13:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:13:31,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:13:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2024-01-31 16:13:31,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7228915662650602 [2024-01-31 16:13:31,261 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 176 flow. Second operand 4 states and 240 transitions. [2024-01-31 16:13:31,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 257 flow [2024-01-31 16:13:31,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 257 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:13:31,264 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 156 flow [2024-01-31 16:13:31,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-01-31 16:13:31,265 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2024-01-31 16:13:31,265 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 156 flow [2024-01-31 16:13:31,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 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 16:13:31,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:31,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:13:31,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:13:31,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-01-31 16:13:31,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1085225256, now seen corresponding path program 1 times [2024-01-31 16:13:31,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:31,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653265961] [2024-01-31 16:13:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:31,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:31,311 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 16:13:31,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:31,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653265961] [2024-01-31 16:13:31,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653265961] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:13:31,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:13:31,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:13:31,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104054339] [2024-01-31 16:13:31,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:13:31,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:13:31,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:31,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:13:31,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:13:31,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 83 [2024-01-31 16:13:31,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:13:31,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:31,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 83 [2024-01-31 16:13:31,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:31,619 INFO L124 PetriNetUnfolderBase]: 1076/2398 cut-off events. [2024-01-31 16:13:31,619 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-01-31 16:13:31,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4106 conditions, 2398 events. 1076/2398 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17080 event pairs, 335 based on Foata normal form. 162/2391 useless extension candidates. Maximal degree in co-relation 4090. Up to 1402 conditions per place. [2024-01-31 16:13:31,636 INFO L140 encePairwiseOnDemand]: 70/83 looper letters, 49 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2024-01-31 16:13:31,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 295 flow [2024-01-31 16:13:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:13:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:13:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-01-31 16:13:31,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6947791164658634 [2024-01-31 16:13:31,641 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 156 flow. Second operand 3 states and 173 transitions. [2024-01-31 16:13:31,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 295 flow [2024-01-31 16:13:31,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 86 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:13:31,644 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 190 flow [2024-01-31 16:13:31,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2024-01-31 16:13:31,647 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -4 predicate places. [2024-01-31 16:13:31,647 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 190 flow [2024-01-31 16:13:31,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:13:31,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:31,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-31 16:13:31,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:13:31,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-01-31 16:13:31,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:31,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1151416436, now seen corresponding path program 1 times [2024-01-31 16:13:31,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:31,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873098137] [2024-01-31 16:13:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:31,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:13:31,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:31,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873098137] [2024-01-31 16:13:31,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873098137] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:13:31,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:13:31,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:13:31,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607969667] [2024-01-31 16:13:31,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:13:31,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:13:31,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:31,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:13:31,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:13:31,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 83 [2024-01-31 16:13:31,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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 16:13:31,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:31,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 83 [2024-01-31 16:13:31,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:31,979 INFO L124 PetriNetUnfolderBase]: 539/1463 cut-off events. [2024-01-31 16:13:31,979 INFO L125 PetriNetUnfolderBase]: For 92/116 co-relation queries the response was YES. [2024-01-31 16:13:31,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2530 conditions, 1463 events. 539/1463 cut-off events. For 92/116 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10679 event pairs, 21 based on Foata normal form. 60/1407 useless extension candidates. Maximal degree in co-relation 2513. Up to 737 conditions per place. [2024-01-31 16:13:31,989 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 46 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2024-01-31 16:13:31,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 330 flow [2024-01-31 16:13:31,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:13:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:13:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 237 transitions. [2024-01-31 16:13:31,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.713855421686747 [2024-01-31 16:13:31,991 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 190 flow. Second operand 4 states and 237 transitions. [2024-01-31 16:13:31,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 330 flow [2024-01-31 16:13:31,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 92 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:13:31,999 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 185 flow [2024-01-31 16:13:31,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-01-31 16:13:32,001 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2024-01-31 16:13:32,001 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 185 flow [2024-01-31 16:13:32,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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 16:13:32,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:32,002 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-31 16:13:32,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:13:32,002 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-01-31 16:13:32,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:32,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1334201948, now seen corresponding path program 1 times [2024-01-31 16:13:32,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:32,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914605435] [2024-01-31 16:13:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:32,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:13:32,018 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:13:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:13:32,029 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:13:32,030 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:13:32,030 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (36 of 37 remaining) [2024-01-31 16:13:32,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 37 remaining) [2024-01-31 16:13:32,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 37 remaining) [2024-01-31 16:13:32,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 37 remaining) [2024-01-31 16:13:32,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 37 remaining) [2024-01-31 16:13:32,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 37 remaining) [2024-01-31 16:13:32,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 37 remaining) [2024-01-31 16:13:32,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 37 remaining) [2024-01-31 16:13:32,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 37 remaining) [2024-01-31 16:13:32,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 37 remaining) [2024-01-31 16:13:32,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 37 remaining) [2024-01-31 16:13:32,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 37 remaining) [2024-01-31 16:13:32,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (24 of 37 remaining) [2024-01-31 16:13:32,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 37 remaining) [2024-01-31 16:13:32,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 37 remaining) [2024-01-31 16:13:32,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 37 remaining) [2024-01-31 16:13:32,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 37 remaining) [2024-01-31 16:13:32,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 37 remaining) [2024-01-31 16:13:32,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 37 remaining) [2024-01-31 16:13:32,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 37 remaining) [2024-01-31 16:13:32,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 37 remaining) [2024-01-31 16:13:32,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 37 remaining) [2024-01-31 16:13:32,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 37 remaining) [2024-01-31 16:13:32,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 37 remaining) [2024-01-31 16:13:32,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (12 of 37 remaining) [2024-01-31 16:13:32,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 37 remaining) [2024-01-31 16:13:32,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 37 remaining) [2024-01-31 16:13:32,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 37 remaining) [2024-01-31 16:13:32,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 37 remaining) [2024-01-31 16:13:32,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 37 remaining) [2024-01-31 16:13:32,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 37 remaining) [2024-01-31 16:13:32,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 37 remaining) [2024-01-31 16:13:32,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 37 remaining) [2024-01-31 16:13:32,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 37 remaining) [2024-01-31 16:13:32,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 37 remaining) [2024-01-31 16:13:32,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 37 remaining) [2024-01-31 16:13:32,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (0 of 37 remaining) [2024-01-31 16:13:32,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:13:32,038 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-01-31 16:13:32,039 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:13:32,039 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-31 16:13:32,067 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:13:32,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 122 transitions, 262 flow [2024-01-31 16:13:32,084 INFO L124 PetriNetUnfolderBase]: 12/130 cut-off events. [2024-01-31 16:13:32,084 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:13:32,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 130 events. 12/130 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 504 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 117. Up to 4 conditions per place. [2024-01-31 16:13:32,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 122 transitions, 262 flow [2024-01-31 16:13:32,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 122 transitions, 262 flow [2024-01-31 16:13:32,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:13:32,096 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;@6c0a976c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:13:32,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2024-01-31 16:13:32,098 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:13:32,098 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-01-31 16:13:32,098 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:13:32,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:32,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:13:32,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-01-31 16:13:32,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:32,099 INFO L85 PathProgramCache]: Analyzing trace with hash 432301671, now seen corresponding path program 1 times [2024-01-31 16:13:32,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:32,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788112871] [2024-01-31 16:13:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:32,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:32,165 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 16:13:32,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:32,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788112871] [2024-01-31 16:13:32,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788112871] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:13:32,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:13:32,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:13:32,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589811802] [2024-01-31 16:13:32,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:13:32,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:13:32,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:13:32,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:13:32,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 122 [2024-01-31 16:13:32,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 122 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 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 16:13:32,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:32,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 122 [2024-01-31 16:13:32,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:34,003 INFO L124 PetriNetUnfolderBase]: 9160/21040 cut-off events. [2024-01-31 16:13:34,003 INFO L125 PetriNetUnfolderBase]: For 583/583 co-relation queries the response was YES. [2024-01-31 16:13:34,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33337 conditions, 21040 events. 9160/21040 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 223550 event pairs, 780 based on Foata normal form. 3510/20364 useless extension candidates. Maximal degree in co-relation 27210. Up to 11134 conditions per place. [2024-01-31 16:13:34,160 INFO L140 encePairwiseOnDemand]: 107/122 looper letters, 55 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2024-01-31 16:13:34,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 129 transitions, 402 flow [2024-01-31 16:13:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:13:34,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:13:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2024-01-31 16:13:34,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-01-31 16:13:34,164 INFO L175 Difference]: Start difference. First operand has 117 places, 122 transitions, 262 flow. Second operand 4 states and 366 transitions. [2024-01-31 16:13:34,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 129 transitions, 402 flow [2024-01-31 16:13:34,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 129 transitions, 398 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-01-31 16:13:34,168 INFO L231 Difference]: Finished difference. Result has 110 places, 106 transitions, 232 flow [2024-01-31 16:13:34,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=110, PETRI_TRANSITIONS=106} [2024-01-31 16:13:34,171 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -7 predicate places. [2024-01-31 16:13:34,171 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 106 transitions, 232 flow [2024-01-31 16:13:34,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 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 16:13:34,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:34,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-31 16:13:34,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:13:34,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-01-31 16:13:34,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:34,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1973492660, now seen corresponding path program 1 times [2024-01-31 16:13:34,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:34,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933382944] [2024-01-31 16:13:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:34,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:13:34,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:34,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933382944] [2024-01-31 16:13:34,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933382944] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:13:34,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:13:34,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:13:34,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518311044] [2024-01-31 16:13:34,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:13:34,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:13:34,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:34,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:13:34,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:13:34,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 122 [2024-01-31 16:13:34,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 106 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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 16:13:34,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:34,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 122 [2024-01-31 16:13:34,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:36,111 INFO L124 PetriNetUnfolderBase]: 9103/22029 cut-off events. [2024-01-31 16:13:36,112 INFO L125 PetriNetUnfolderBase]: For 323/323 co-relation queries the response was YES. [2024-01-31 16:13:36,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34204 conditions, 22029 events. 9103/22029 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 242012 event pairs, 2044 based on Foata normal form. 660/18131 useless extension candidates. Maximal degree in co-relation 34187. Up to 11028 conditions per place. [2024-01-31 16:13:36,276 INFO L140 encePairwiseOnDemand]: 117/122 looper letters, 64 selfloop transitions, 2 changer transitions 0/135 dead transitions. [2024-01-31 16:13:36,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 135 transitions, 427 flow [2024-01-31 16:13:36,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:13:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:13:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2024-01-31 16:13:36,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7315573770491803 [2024-01-31 16:13:36,278 INFO L175 Difference]: Start difference. First operand has 110 places, 106 transitions, 232 flow. Second operand 4 states and 357 transitions. [2024-01-31 16:13:36,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 135 transitions, 427 flow [2024-01-31 16:13:36,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 135 transitions, 424 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:13:36,282 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 227 flow [2024-01-31 16:13:36,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-01-31 16:13:36,282 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -9 predicate places. [2024-01-31 16:13:36,283 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 227 flow [2024-01-31 16:13:36,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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 16:13:36,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:36,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:13:36,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:13:36,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-01-31 16:13:36,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:36,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1907340430, now seen corresponding path program 1 times [2024-01-31 16:13:36,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:36,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176979079] [2024-01-31 16:13:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:36,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:36,319 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 16:13:36,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:36,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176979079] [2024-01-31 16:13:36,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176979079] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:13:36,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:13:36,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:13:36,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664577118] [2024-01-31 16:13:36,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:13:36,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:13:36,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:36,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:13:36,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:13:36,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 122 [2024-01-31 16:13:36,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 16:13:36,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:36,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 122 [2024-01-31 16:13:36,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:40,056 INFO L124 PetriNetUnfolderBase]: 32481/54102 cut-off events. [2024-01-31 16:13:40,056 INFO L125 PetriNetUnfolderBase]: For 667/667 co-relation queries the response was YES. [2024-01-31 16:13:40,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97614 conditions, 54102 events. 32481/54102 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 2795. Compared 487181 event pairs, 10368 based on Foata normal form. 1690/52264 useless extension candidates. Maximal degree in co-relation 97598. Up to 40618 conditions per place. [2024-01-31 16:13:40,501 INFO L140 encePairwiseOnDemand]: 103/122 looper letters, 72 selfloop transitions, 4 changer transitions 0/125 dead transitions. [2024-01-31 16:13:40,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 125 transitions, 435 flow [2024-01-31 16:13:40,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:13:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:13:40,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2024-01-31 16:13:40,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6994535519125683 [2024-01-31 16:13:40,504 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 227 flow. Second operand 3 states and 256 transitions. [2024-01-31 16:13:40,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 125 transitions, 435 flow [2024-01-31 16:13:40,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 125 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:13:40,508 INFO L231 Difference]: Finished difference. Result has 109 places, 106 transitions, 278 flow [2024-01-31 16:13:40,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=109, PETRI_TRANSITIONS=106} [2024-01-31 16:13:40,510 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -8 predicate places. [2024-01-31 16:13:40,510 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 106 transitions, 278 flow [2024-01-31 16:13:40,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 16:13:40,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:40,511 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-01-31 16:13:40,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:13:40,511 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-01-31 16:13:40,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:40,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1385600840, now seen corresponding path program 1 times [2024-01-31 16:13:40,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:40,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870174403] [2024-01-31 16:13:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:40,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 16:13:40,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:40,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870174403] [2024-01-31 16:13:40,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870174403] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:13:40,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:13:40,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:13:40,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371848108] [2024-01-31 16:13:40,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:13:40,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:13:40,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:40,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:13:40,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:13:40,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 122 [2024-01-31 16:13:40,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 16:13:40,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:40,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 122 [2024-01-31 16:13:40,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:42,478 INFO L124 PetriNetUnfolderBase]: 10888/22230 cut-off events. [2024-01-31 16:13:42,478 INFO L125 PetriNetUnfolderBase]: For 1821/2706 co-relation queries the response was YES. [2024-01-31 16:13:42,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40222 conditions, 22230 events. 10888/22230 cut-off events. For 1821/2706 co-relation queries the response was YES. Maximal size of possible extension queue 1277. Compared 223562 event pairs, 1266 based on Foata normal form. 774/20296 useless extension candidates. Maximal degree in co-relation 40204. Up to 10888 conditions per place. [2024-01-31 16:13:42,613 INFO L140 encePairwiseOnDemand]: 117/122 looper letters, 79 selfloop transitions, 2 changer transitions 0/147 dead transitions. [2024-01-31 16:13:42,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 147 transitions, 542 flow [2024-01-31 16:13:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:13:42,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:13:42,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 365 transitions. [2024-01-31 16:13:42,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7479508196721312 [2024-01-31 16:13:42,616 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 278 flow. Second operand 4 states and 365 transitions. [2024-01-31 16:13:42,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 147 transitions, 542 flow [2024-01-31 16:13:42,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 147 transitions, 534 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:13:42,625 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 272 flow [2024-01-31 16:13:42,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-01-31 16:13:42,627 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -9 predicate places. [2024-01-31 16:13:42,627 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 272 flow [2024-01-31 16:13:42,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 16:13:42,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:42,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:13:42,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:13:42,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-01-31 16:13:42,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:42,628 INFO L85 PathProgramCache]: Analyzing trace with hash 839080429, now seen corresponding path program 1 times [2024-01-31 16:13:42,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:42,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404840696] [2024-01-31 16:13:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:42,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:42,706 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 16:13:42,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:42,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404840696] [2024-01-31 16:13:42,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404840696] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:13:42,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:13:42,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:13:42,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247841959] [2024-01-31 16:13:42,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:13:42,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:13:42,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:42,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:13:42,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:13:42,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 122 [2024-01-31 16:13:42,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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 16:13:42,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:42,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 122 [2024-01-31 16:13:42,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:49,015 INFO L124 PetriNetUnfolderBase]: 65263/104997 cut-off events. [2024-01-31 16:13:49,016 INFO L125 PetriNetUnfolderBase]: For 11423/11657 co-relation queries the response was YES. [2024-01-31 16:13:49,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203978 conditions, 104997 events. 65263/104997 cut-off events. For 11423/11657 co-relation queries the response was YES. Maximal size of possible extension queue 3113. Compared 917027 event pairs, 35569 based on Foata normal form. 10056/111189 useless extension candidates. Maximal degree in co-relation 203960. Up to 59310 conditions per place. [2024-01-31 16:13:49,638 INFO L140 encePairwiseOnDemand]: 91/122 looper letters, 99 selfloop transitions, 19 changer transitions 0/149 dead transitions. [2024-01-31 16:13:49,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 149 transitions, 606 flow [2024-01-31 16:13:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:13:49,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:13:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 296 transitions. [2024-01-31 16:13:49,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6065573770491803 [2024-01-31 16:13:49,642 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 272 flow. Second operand 4 states and 296 transitions. [2024-01-31 16:13:49,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 149 transitions, 606 flow [2024-01-31 16:13:49,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 149 transitions, 601 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:13:49,652 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 404 flow [2024-01-31 16:13:49,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=404, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-01-31 16:13:49,653 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -15 predicate places. [2024-01-31 16:13:49,654 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 404 flow [2024-01-31 16:13:49,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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 16:13:49,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:49,654 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-31 16:13:49,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:13:49,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-01-31 16:13:49,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:49,655 INFO L85 PathProgramCache]: Analyzing trace with hash 3922440, now seen corresponding path program 1 times [2024-01-31 16:13:49,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:49,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761189981] [2024-01-31 16:13:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:49,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:13:49,682 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:13:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:13:49,694 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:13:49,695 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:13:49,695 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2024-01-31 16:13:49,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (47 of 49 remaining) [2024-01-31 16:13:49,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (46 of 49 remaining) [2024-01-31 16:13:49,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (45 of 49 remaining) [2024-01-31 16:13:49,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (44 of 49 remaining) [2024-01-31 16:13:49,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (43 of 49 remaining) [2024-01-31 16:13:49,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (42 of 49 remaining) [2024-01-31 16:13:49,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (41 of 49 remaining) [2024-01-31 16:13:49,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 49 remaining) [2024-01-31 16:13:49,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 49 remaining) [2024-01-31 16:13:49,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 49 remaining) [2024-01-31 16:13:49,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 49 remaining) [2024-01-31 16:13:49,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (36 of 49 remaining) [2024-01-31 16:13:49,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 49 remaining) [2024-01-31 16:13:49,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 49 remaining) [2024-01-31 16:13:49,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 49 remaining) [2024-01-31 16:13:49,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 49 remaining) [2024-01-31 16:13:49,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 49 remaining) [2024-01-31 16:13:49,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 49 remaining) [2024-01-31 16:13:49,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 49 remaining) [2024-01-31 16:13:49,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 49 remaining) [2024-01-31 16:13:49,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 49 remaining) [2024-01-31 16:13:49,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 49 remaining) [2024-01-31 16:13:49,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 49 remaining) [2024-01-31 16:13:49,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (24 of 49 remaining) [2024-01-31 16:13:49,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 49 remaining) [2024-01-31 16:13:49,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 49 remaining) [2024-01-31 16:13:49,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 49 remaining) [2024-01-31 16:13:49,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 49 remaining) [2024-01-31 16:13:49,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 49 remaining) [2024-01-31 16:13:49,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 49 remaining) [2024-01-31 16:13:49,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 49 remaining) [2024-01-31 16:13:49,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 49 remaining) [2024-01-31 16:13:49,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 49 remaining) [2024-01-31 16:13:49,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 49 remaining) [2024-01-31 16:13:49,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 49 remaining) [2024-01-31 16:13:49,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (12 of 49 remaining) [2024-01-31 16:13:49,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 49 remaining) [2024-01-31 16:13:49,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 49 remaining) [2024-01-31 16:13:49,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 49 remaining) [2024-01-31 16:13:49,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 49 remaining) [2024-01-31 16:13:49,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 49 remaining) [2024-01-31 16:13:49,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 49 remaining) [2024-01-31 16:13:49,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 49 remaining) [2024-01-31 16:13:49,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 49 remaining) [2024-01-31 16:13:49,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 49 remaining) [2024-01-31 16:13:49,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 49 remaining) [2024-01-31 16:13:49,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 49 remaining) [2024-01-31 16:13:49,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (0 of 49 remaining) [2024-01-31 16:13:49,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:13:49,703 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-01-31 16:13:49,704 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:13:49,704 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-31 16:13:49,751 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:13:49,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 161 transitions, 350 flow [2024-01-31 16:13:49,775 INFO L124 PetriNetUnfolderBase]: 16/172 cut-off events. [2024-01-31 16:13:49,775 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-31 16:13:49,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 172 events. 16/172 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 750 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 155. Up to 5 conditions per place. [2024-01-31 16:13:49,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 161 transitions, 350 flow [2024-01-31 16:13:49,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 161 transitions, 350 flow [2024-01-31 16:13:49,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:13:49,782 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;@6c0a976c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:13:49,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-01-31 16:13:49,783 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:13:49,783 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-01-31 16:13:49,783 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:13:49,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:49,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:13:49,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 58 more)] === [2024-01-31 16:13:49,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:49,785 INFO L85 PathProgramCache]: Analyzing trace with hash 585982510, now seen corresponding path program 1 times [2024-01-31 16:13:49,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:49,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357404532] [2024-01-31 16:13:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:49,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:49,851 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 16:13:49,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:49,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357404532] [2024-01-31 16:13:49,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357404532] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:13:49,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:13:49,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:13:49,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35964602] [2024-01-31 16:13:49,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:13:49,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:13:49,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:49,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:13:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:13:49,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 161 [2024-01-31 16:13:49,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 161 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 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 16:13:49,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:49,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 161 [2024-01-31 16:13:49,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand