./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.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/45_monabsex1_vs.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/45_monabsex1_vs.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/45_monabsex1_vs.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 16:02:03,987 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:02:04,022 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:02:04,026 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:02:04,026 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:02:04,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:02:04,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:02:04,046 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:02:04,051 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:02:04,052 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:02:04,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:02:04,053 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:02:04,053 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:02:04,055 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:02:04,055 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:02:04,055 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:02:04,056 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:02:04,056 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:02:04,059 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:02:04,059 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:02:04,059 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:02:04,059 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:02:04,060 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:02:04,060 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:02:04,060 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:02:04,060 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:02:04,060 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:02:04,061 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:02:04,061 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:02:04,061 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:02:04,061 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:02:04,061 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:02:04,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:02:04,062 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:02:04,063 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:02:04,063 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:02:04,063 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:02:04,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:02:04,064 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:02:04,064 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:02:04,064 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:02:04,064 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:02:04,065 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:02:04,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:02:04,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:02:04,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:02:04,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:02:04,338 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:02:04,338 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:02:04,339 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2024-01-31 16:02:05,303 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:02:05,504 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:02:05,508 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2024-01-31 16:02:05,520 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/352210fe7/53bbd90967cf43278368937f1336cef6/FLAG7ceaa6ecf [2024-01-31 16:02:05,530 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/352210fe7/53bbd90967cf43278368937f1336cef6 [2024-01-31 16:02:05,533 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:02:05,533 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:02:05,534 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/45_monabsex1_vs.yml/witness.yml [2024-01-31 16:02:05,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:02:05,668 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:02:05,669 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:02:05,669 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:02:05,686 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:02:05,687 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:02:05" (1/2) ... [2024-01-31 16:02:05,688 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da394a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:05, skipping insertion in model container [2024-01-31 16:02:05,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:02:05" (1/2) ... [2024-01-31 16:02:05,691 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@43161155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:02:05, skipping insertion in model container [2024-01-31 16:02:05,691 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:02:05" (2/2) ... [2024-01-31 16:02:05,691 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da394a0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:02:05, skipping insertion in model container [2024-01-31 16:02:05,691 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:02:05" (2/2) ... [2024-01-31 16:02:05,692 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:02:05,750 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:02:05,751 INFO L98 nessWitnessExtractor]: Location invariant before [L711-L711] (((4 == l) && (s == 4)) && (l == 4)) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:05,751 INFO L98 nessWitnessExtractor]: Location invariant after [L710-L710] (((4 == l) && (l == 4)) && ((unsigned long )arg == 0UL)) && (s != 4) [2024-01-31 16:02:05,751 INFO L98 nessWitnessExtractor]: Location invariant before [L705-L705] (unsigned long )arg == 0UL [2024-01-31 16:02:05,751 INFO L98 nessWitnessExtractor]: Location invariant before [L716-L716] s == 0 [2024-01-31 16:02:05,752 INFO L98 nessWitnessExtractor]: Location invariant after [L704-L704] (unsigned long )arg == 0UL [2024-01-31 16:02:05,752 INFO L98 nessWitnessExtractor]: Location invariant before [L709-L709] ((4 == l) && (l == 4)) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:05,752 INFO L98 nessWitnessExtractor]: Location invariant before [L704-L704] (unsigned long )arg == 0UL [2024-01-31 16:02:05,752 INFO L98 nessWitnessExtractor]: Location invariant before [L710-L710] ((4 == l) && (l == 4)) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:05,753 INFO L98 nessWitnessExtractor]: Location invariant before [L712-L712] ((4 == l) && (l == 4)) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:05,753 INFO L98 nessWitnessExtractor]: Location invariant before [L706-L706] ((4 == l) && (l == 4)) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:05,753 INFO L98 nessWitnessExtractor]: Location invariant before [L707-L707] ((4 == l) && (l == 4)) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:05,753 INFO L98 nessWitnessExtractor]: Location invariant before [L708-L708] (((4 == l) && (s == 4)) && (l == 4)) && ((unsigned long )arg == 0UL) [2024-01-31 16:02:05,753 INFO L98 nessWitnessExtractor]: Location invariant before [L710-L710] (((4 == l) && (l == 4)) && ((unsigned long )arg == 0UL)) && (s != 4) [2024-01-31 16:02:05,790 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:02:06,046 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/45_monabsex1_vs.i[30633,30646] [2024-01-31 16:02:06,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:02:06,066 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:02:06,089 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:02:06,092 WARN L424 MainDispatcher]: Unable to annotate l = __VERIFIER_nondet_int() with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:02:06,116 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/45_monabsex1_vs.i[30633,30646] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:02:06,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:02:06,144 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:02:06,145 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:02:06 WrapperNode [2024-01-31 16:02:06,145 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:02:06,146 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:02:06,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:02:06,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:02:06,152 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 04:02:06" (1/1) ... [2024-01-31 16:02:06,188 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 04:02:06" (1/1) ... [2024-01-31 16:02:06,204 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 25 [2024-01-31 16:02:06,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:02:06,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:02:06,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:02:06,205 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:02:06,213 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 04:02:06" (1/1) ... [2024-01-31 16:02:06,213 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 04:02:06" (1/1) ... [2024-01-31 16:02:06,223 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 04:02:06" (1/1) ... [2024-01-31 16:02:06,240 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-01-31 16:02:06,241 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 04:02:06" (1/1) ... [2024-01-31 16:02:06,241 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 04:02:06" (1/1) ... [2024-01-31 16:02:06,255 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 04:02:06" (1/1) ... [2024-01-31 16:02:06,259 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 04:02:06" (1/1) ... [2024-01-31 16:02:06,263 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 04:02:06" (1/1) ... [2024-01-31 16:02:06,264 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 04:02:06" (1/1) ... [2024-01-31 16:02:06,265 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:02:06,269 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:02:06,269 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:02:06,269 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:02:06,270 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 04:02:06" (1/1) ... [2024-01-31 16:02:06,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:02:06,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:02:06,291 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 16:02:06,306 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 16:02:06,321 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-31 16:02:06,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-31 16:02:06,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:02:06,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:02:06,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 16:02:06,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:02:06,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:02:06,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:02:06,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:02:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:02:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 16:02:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:02:06,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:02:06,325 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 16:02:06,423 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:02:06,425 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:02:06,623 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:02:06,623 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:02:06,685 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:02:06,686 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-01-31 16:02:06,686 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:02:06 BoogieIcfgContainer [2024-01-31 16:02:06,686 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:02:06,688 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:02:06,696 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:02:06,699 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:02:06,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:02:05" (1/4) ... [2024-01-31 16:02:06,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c83d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:02:06, skipping insertion in model container [2024-01-31 16:02:06,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:02:05" (2/4) ... [2024-01-31 16:02:06,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c83d9f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:02:06, skipping insertion in model container [2024-01-31 16:02:06,701 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 04:02:06" (3/4) ... [2024-01-31 16:02:06,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c83d9f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:02:06, skipping insertion in model container [2024-01-31 16:02:06,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:02:06" (4/4) ... [2024-01-31 16:02:06,703 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2024-01-31 16:02:06,718 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:02:06,719 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-01-31 16:02:06,719 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:02:06,764 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:02:06,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 52 flow [2024-01-31 16:02:06,820 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2024-01-31 16:02:06,820 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:06,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 26 events. 0/26 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 32 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2024-01-31 16:02:06,822 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 24 transitions, 52 flow [2024-01-31 16:02:06,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 52 flow [2024-01-31 16:02:06,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:02:06,843 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;@cffe188, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:02:06,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-01-31 16:02:06,845 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:02:06,845 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:02:06,845 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:06,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:06,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:02:06,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-01-31 16:02:06,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash 5631, now seen corresponding path program 1 times [2024-01-31 16:02:06,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:06,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749198153] [2024-01-31 16:02:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:06,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:07,005 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 16:02:07,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:07,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749198153] [2024-01-31 16:02:07,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749198153] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:07,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:07,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:02:07,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521061304] [2024-01-31 16:02:07,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:07,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:07,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:07,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:07,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2024-01-31 16:02:07,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 16:02:07,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:07,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2024-01-31 16:02:07,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:07,122 INFO L124 PetriNetUnfolderBase]: 8/42 cut-off events. [2024-01-31 16:02:07,122 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:07,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 42 events. 8/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 91 event pairs, 8 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 62. Up to 29 conditions per place. [2024-01-31 16:02:07,124 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 10 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2024-01-31 16:02:07,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 66 flow [2024-01-31 16:02:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2024-01-31 16:02:07,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-01-31 16:02:07,136 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 52 flow. Second operand 3 states and 38 transitions. [2024-01-31 16:02:07,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 66 flow [2024-01-31 16:02:07,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 66 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:07,141 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 46 flow [2024-01-31 16:02:07,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2024-01-31 16:02:07,145 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-01-31 16:02:07,145 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 46 flow [2024-01-31 16:02:07,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 16:02:07,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:07,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-31 16:02:07,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:02:07,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-01-31 16:02:07,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:07,147 INFO L85 PathProgramCache]: Analyzing trace with hash 910850349, now seen corresponding path program 1 times [2024-01-31 16:02:07,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:07,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010188836] [2024-01-31 16:02:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:07,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:07,191 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:02:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:07,216 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:02:07,216 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:02:07,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2024-01-31 16:02:07,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 22 remaining) [2024-01-31 16:02:07,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 22 remaining) [2024-01-31 16:02:07,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 22 remaining) [2024-01-31 16:02:07,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 22 remaining) [2024-01-31 16:02:07,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 22 remaining) [2024-01-31 16:02:07,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 22 remaining) [2024-01-31 16:02:07,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 22 remaining) [2024-01-31 16:02:07,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (13 of 22 remaining) [2024-01-31 16:02:07,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 22 remaining) [2024-01-31 16:02:07,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 22 remaining) [2024-01-31 16:02:07,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 22 remaining) [2024-01-31 16:02:07,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 22 remaining) [2024-01-31 16:02:07,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 22 remaining) [2024-01-31 16:02:07,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 22 remaining) [2024-01-31 16:02:07,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 22 remaining) [2024-01-31 16:02:07,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 22 remaining) [2024-01-31 16:02:07,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 22 remaining) [2024-01-31 16:02:07,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 22 remaining) [2024-01-31 16:02:07,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (2 of 22 remaining) [2024-01-31 16:02:07,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 22 remaining) [2024-01-31 16:02:07,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 22 remaining) [2024-01-31 16:02:07,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:02:07,223 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-31 16:02:07,225 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:02:07,225 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-31 16:02:07,259 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:02:07,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 42 transitions, 94 flow [2024-01-31 16:02:07,267 INFO L124 PetriNetUnfolderBase]: 0/46 cut-off events. [2024-01-31 16:02:07,267 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:02:07,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 46 events. 0/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 117 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2024-01-31 16:02:07,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 42 transitions, 94 flow [2024-01-31 16:02:07,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 42 transitions, 94 flow [2024-01-31 16:02:07,269 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:02:07,270 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;@cffe188, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:02:07,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2024-01-31 16:02:07,271 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:02:07,271 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:02:07,271 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:07,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:07,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:02:07,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 29 more)] === [2024-01-31 16:02:07,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:07,272 INFO L85 PathProgramCache]: Analyzing trace with hash 6975, now seen corresponding path program 1 times [2024-01-31 16:02:07,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:07,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756164393] [2024-01-31 16:02:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:07,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:07,311 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 16:02:07,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:07,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756164393] [2024-01-31 16:02:07,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756164393] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:07,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:07,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:02:07,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762366688] [2024-01-31 16:02:07,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:07,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:07,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:07,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:07,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:07,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-01-31 16:02:07,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 16:02:07,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:07,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-01-31 16:02:07,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:07,481 INFO L124 PetriNetUnfolderBase]: 224/527 cut-off events. [2024-01-31 16:02:07,481 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-01-31 16:02:07,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 527 events. 224/527 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3029 event pairs, 224 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 747. Up to 407 conditions per place. [2024-01-31 16:02:07,491 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 19 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-01-31 16:02:07,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 120 flow [2024-01-31 16:02:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-01-31 16:02:07,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-01-31 16:02:07,494 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 94 flow. Second operand 3 states and 68 transitions. [2024-01-31 16:02:07,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 120 flow [2024-01-31 16:02:07,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 34 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:07,496 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 82 flow [2024-01-31 16:02:07,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-01-31 16:02:07,499 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -6 predicate places. [2024-01-31 16:02:07,499 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 82 flow [2024-01-31 16:02:07,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 16:02:07,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:07,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:02:07,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:02:07,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 29 more)] === [2024-01-31 16:02:07,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:07,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2141594775, now seen corresponding path program 1 times [2024-01-31 16:02:07,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:07,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840437134] [2024-01-31 16:02:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:07,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:07,677 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 16:02:07,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:07,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840437134] [2024-01-31 16:02:07,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840437134] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:07,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:07,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:07,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551349383] [2024-01-31 16:02:07,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:07,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:07,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:07,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:07,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:07,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-01-31 16:02:07,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 16:02:07,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:07,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-01-31 16:02:07,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:07,847 INFO L124 PetriNetUnfolderBase]: 224/502 cut-off events. [2024-01-31 16:02:07,847 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-01-31 16:02:07,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 502 events. 224/502 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2664 event pairs, 92 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 934. Up to 376 conditions per place. [2024-01-31 16:02:07,853 INFO L140 encePairwiseOnDemand]: 39/42 looper letters, 30 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2024-01-31 16:02:07,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 171 flow [2024-01-31 16:02:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-01-31 16:02:07,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-01-31 16:02:07,855 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 82 flow. Second operand 4 states and 85 transitions. [2024-01-31 16:02:07,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 171 flow [2024-01-31 16:02:07,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 167 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:07,858 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 80 flow [2024-01-31 16:02:07,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-01-31 16:02:07,859 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -6 predicate places. [2024-01-31 16:02:07,860 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 80 flow [2024-01-31 16:02:07,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 16:02:07,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:07,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:07,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:02:07,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 29 more)] === [2024-01-31 16:02:07,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1964928340, now seen corresponding path program 1 times [2024-01-31 16:02:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:07,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118849225] [2024-01-31 16:02:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:07,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:07,914 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 16:02:07,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:07,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118849225] [2024-01-31 16:02:07,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118849225] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:07,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:07,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:07,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173923053] [2024-01-31 16:02:07,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:07,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:07,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:07,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:07,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-01-31 16:02:07,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 16:02:07,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:07,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-01-31 16:02:07,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:08,005 INFO L124 PetriNetUnfolderBase]: 224/433 cut-off events. [2024-01-31 16:02:08,006 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-01-31 16:02:08,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 433 events. 224/433 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2031 event pairs, 35 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 719. Up to 329 conditions per place. [2024-01-31 16:02:08,009 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 30 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2024-01-31 16:02:08,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 157 flow [2024-01-31 16:02:08,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:08,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:08,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-01-31 16:02:08,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-31 16:02:08,012 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 80 flow. Second operand 3 states and 60 transitions. [2024-01-31 16:02:08,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 157 flow [2024-01-31 16:02:08,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:08,015 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 69 flow [2024-01-31 16:02:08,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2024-01-31 16:02:08,016 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -11 predicate places. [2024-01-31 16:02:08,016 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 69 flow [2024-01-31 16:02:08,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 16:02:08,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:08,017 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2024-01-31 16:02:08,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:02:08,018 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 29 more)] === [2024-01-31 16:02:08,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:08,018 INFO L85 PathProgramCache]: Analyzing trace with hash -783876008, now seen corresponding path program 1 times [2024-01-31 16:02:08,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:08,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465510829] [2024-01-31 16:02:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:08,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:08,044 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:02:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:08,059 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:02:08,060 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:02:08,060 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (31 of 32 remaining) [2024-01-31 16:02:08,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 32 remaining) [2024-01-31 16:02:08,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 32 remaining) [2024-01-31 16:02:08,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 32 remaining) [2024-01-31 16:02:08,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 32 remaining) [2024-01-31 16:02:08,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 32 remaining) [2024-01-31 16:02:08,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 32 remaining) [2024-01-31 16:02:08,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 32 remaining) [2024-01-31 16:02:08,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (23 of 32 remaining) [2024-01-31 16:02:08,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 32 remaining) [2024-01-31 16:02:08,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 32 remaining) [2024-01-31 16:02:08,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 32 remaining) [2024-01-31 16:02:08,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 32 remaining) [2024-01-31 16:02:08,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 32 remaining) [2024-01-31 16:02:08,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 32 remaining) [2024-01-31 16:02:08,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 32 remaining) [2024-01-31 16:02:08,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 32 remaining) [2024-01-31 16:02:08,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 32 remaining) [2024-01-31 16:02:08,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 32 remaining) [2024-01-31 16:02:08,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (12 of 32 remaining) [2024-01-31 16:02:08,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 32 remaining) [2024-01-31 16:02:08,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 32 remaining) [2024-01-31 16:02:08,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 32 remaining) [2024-01-31 16:02:08,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 32 remaining) [2024-01-31 16:02:08,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 32 remaining) [2024-01-31 16:02:08,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 32 remaining) [2024-01-31 16:02:08,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 32 remaining) [2024-01-31 16:02:08,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 32 remaining) [2024-01-31 16:02:08,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 32 remaining) [2024-01-31 16:02:08,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (2 of 32 remaining) [2024-01-31 16:02:08,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 32 remaining) [2024-01-31 16:02:08,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 32 remaining) [2024-01-31 16:02:08,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:02:08,069 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-01-31 16:02:08,070 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:02:08,070 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-31 16:02:08,098 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:02:08,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 60 transitions, 138 flow [2024-01-31 16:02:08,107 INFO L124 PetriNetUnfolderBase]: 0/66 cut-off events. [2024-01-31 16:02:08,108 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:02:08,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 66 events. 0/66 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 232 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2024-01-31 16:02:08,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 60 transitions, 138 flow [2024-01-31 16:02:08,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 60 transitions, 138 flow [2024-01-31 16:02:08,111 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:02:08,116 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;@cffe188, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:02:08,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2024-01-31 16:02:08,117 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:02:08,117 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:02:08,117 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:08,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:08,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:02:08,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-31 16:02:08,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash 8895, now seen corresponding path program 1 times [2024-01-31 16:02:08,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:08,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530961267] [2024-01-31 16:02:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:08,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:08,138 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 16:02:08,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:08,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530961267] [2024-01-31 16:02:08,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530961267] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:08,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:08,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:02:08,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947397883] [2024-01-31 16:02:08,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:08,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:08,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:08,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:08,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-01-31 16:02:08,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 16:02:08,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:08,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-01-31 16:02:08,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:08,654 INFO L124 PetriNetUnfolderBase]: 3464/6087 cut-off events. [2024-01-31 16:02:08,655 INFO L125 PetriNetUnfolderBase]: For 553/553 co-relation queries the response was YES. [2024-01-31 16:02:08,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11550 conditions, 6087 events. 3464/6087 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 45510 event pairs, 3464 based on Foata normal form. 0/4134 useless extension candidates. Maximal degree in co-relation 1688. Up to 5105 conditions per place. [2024-01-31 16:02:08,691 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 28 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-01-31 16:02:08,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 176 flow [2024-01-31 16:02:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-01-31 16:02:08,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-01-31 16:02:08,695 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 138 flow. Second operand 3 states and 98 transitions. [2024-01-31 16:02:08,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 176 flow [2024-01-31 16:02:08,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 49 transitions, 174 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:08,700 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 118 flow [2024-01-31 16:02:08,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-01-31 16:02:08,701 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2024-01-31 16:02:08,701 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 118 flow [2024-01-31 16:02:08,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 16:02:08,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:08,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:02:08,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:02:08,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-31 16:02:08,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:08,703 INFO L85 PathProgramCache]: Analyzing trace with hash -366571078, now seen corresponding path program 1 times [2024-01-31 16:02:08,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:08,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585772933] [2024-01-31 16:02:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:08,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:08,797 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 16:02:08,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:08,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585772933] [2024-01-31 16:02:08,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585772933] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:08,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:08,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:08,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311674001] [2024-01-31 16:02:08,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:08,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:08,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:08,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:08,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:08,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-01-31 16:02:08,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 16:02:08,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:08,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-01-31 16:02:08,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:09,299 INFO L124 PetriNetUnfolderBase]: 3464/6135 cut-off events. [2024-01-31 16:02:09,299 INFO L125 PetriNetUnfolderBase]: For 272/272 co-relation queries the response was YES. [2024-01-31 16:02:09,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11520 conditions, 6135 events. 3464/6135 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 46581 event pairs, 224 based on Foata normal form. 0/4155 useless extension candidates. Maximal degree in co-relation 11508. Up to 4696 conditions per place. [2024-01-31 16:02:09,346 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 48 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-01-31 16:02:09,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 266 flow [2024-01-31 16:02:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-01-31 16:02:09,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-01-31 16:02:09,349 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 118 flow. Second operand 4 states and 127 transitions. [2024-01-31 16:02:09,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 266 flow [2024-01-31 16:02:09,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:09,352 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 116 flow [2024-01-31 16:02:09,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2024-01-31 16:02:09,353 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2024-01-31 16:02:09,353 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 116 flow [2024-01-31 16:02:09,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 16:02:09,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:09,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:09,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:02:09,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-31 16:02:09,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:09,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1521198775, now seen corresponding path program 1 times [2024-01-31 16:02:09,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:09,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531717712] [2024-01-31 16:02:09,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:09,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:09,390 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 16:02:09,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:09,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531717712] [2024-01-31 16:02:09,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531717712] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:09,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:09,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:09,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334269534] [2024-01-31 16:02:09,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:09,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:09,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:09,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:09,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:09,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 60 [2024-01-31 16:02:09,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 16:02:09,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:09,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 60 [2024-01-31 16:02:09,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:09,795 INFO L124 PetriNetUnfolderBase]: 3464/5345 cut-off events. [2024-01-31 16:02:09,795 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-01-31 16:02:09,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10911 conditions, 5345 events. 3464/5345 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33487 event pairs, 629 based on Foata normal form. 0/4049 useless extension candidates. Maximal degree in co-relation 9358. Up to 4109 conditions per place. [2024-01-31 16:02:09,820 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 48 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2024-01-31 16:02:09,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 62 transitions, 252 flow [2024-01-31 16:02:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-01-31 16:02:09,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-01-31 16:02:09,822 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 116 flow. Second operand 3 states and 96 transitions. [2024-01-31 16:02:09,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 62 transitions, 252 flow [2024-01-31 16:02:09,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:09,824 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 105 flow [2024-01-31 16:02:09,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2024-01-31 16:02:09,825 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -14 predicate places. [2024-01-31 16:02:09,825 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 105 flow [2024-01-31 16:02:09,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 16:02:09,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:09,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:09,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:02:09,826 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-31 16:02:09,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:09,827 INFO L85 PathProgramCache]: Analyzing trace with hash -88100236, now seen corresponding path program 1 times [2024-01-31 16:02:09,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:09,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281909625] [2024-01-31 16:02:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:09,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:09,888 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 16:02:09,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:09,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281909625] [2024-01-31 16:02:09,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281909625] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:09,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:09,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:09,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488725749] [2024-01-31 16:02:09,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:09,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:09,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:09,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:09,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:09,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-01-31 16:02:09,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 16:02:09,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:09,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-01-31 16:02:09,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:10,236 INFO L124 PetriNetUnfolderBase]: 2654/4726 cut-off events. [2024-01-31 16:02:10,236 INFO L125 PetriNetUnfolderBase]: For 395/395 co-relation queries the response was YES. [2024-01-31 16:02:10,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9239 conditions, 4726 events. 2654/4726 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33854 event pairs, 62 based on Foata normal form. 0/3438 useless extension candidates. Maximal degree in co-relation 7699. Up to 3592 conditions per place. [2024-01-31 16:02:10,258 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 49 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-01-31 16:02:10,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 262 flow [2024-01-31 16:02:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-01-31 16:02:10,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-01-31 16:02:10,264 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 105 flow. Second operand 4 states and 128 transitions. [2024-01-31 16:02:10,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 262 flow [2024-01-31 16:02:10,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 259 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:02:10,267 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 106 flow [2024-01-31 16:02:10,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2024-01-31 16:02:10,268 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -13 predicate places. [2024-01-31 16:02:10,268 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 106 flow [2024-01-31 16:02:10,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 16:02:10,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:10,269 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:10,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:02:10,270 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-31 16:02:10,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:10,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1563860302, now seen corresponding path program 1 times [2024-01-31 16:02:10,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:10,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479628453] [2024-01-31 16:02:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:10,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:10,307 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 16:02:10,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:10,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479628453] [2024-01-31 16:02:10,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479628453] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:10,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:10,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:10,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408502521] [2024-01-31 16:02:10,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:10,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:10,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:10,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:10,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:10,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 60 [2024-01-31 16:02:10,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 16:02:10,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:10,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 60 [2024-01-31 16:02:10,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:10,589 INFO L124 PetriNetUnfolderBase]: 2654/4095 cut-off events. [2024-01-31 16:02:10,589 INFO L125 PetriNetUnfolderBase]: For 398/398 co-relation queries the response was YES. [2024-01-31 16:02:10,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8755 conditions, 4095 events. 2654/4095 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 24111 event pairs, 491 based on Foata normal form. 0/3338 useless extension candidates. Maximal degree in co-relation 7281. Up to 3143 conditions per place. [2024-01-31 16:02:10,610 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 43 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2024-01-31 16:02:10,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 223 flow [2024-01-31 16:02:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-01-31 16:02:10,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-01-31 16:02:10,611 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 106 flow. Second operand 3 states and 91 transitions. [2024-01-31 16:02:10,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 223 flow [2024-01-31 16:02:10,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:10,613 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 95 flow [2024-01-31 16:02:10,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2024-01-31 16:02:10,614 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2024-01-31 16:02:10,614 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 95 flow [2024-01-31 16:02:10,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 16:02:10,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:10,614 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:10,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:02:10,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-31 16:02:10,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:10,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1233883558, now seen corresponding path program 1 times [2024-01-31 16:02:10,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:10,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502823844] [2024-01-31 16:02:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:10,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:10,624 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:02:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:10,630 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:02:10,631 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:02:10,631 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (41 of 42 remaining) [2024-01-31 16:02:10,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 42 remaining) [2024-01-31 16:02:10,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 42 remaining) [2024-01-31 16:02:10,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 42 remaining) [2024-01-31 16:02:10,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 42 remaining) [2024-01-31 16:02:10,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 42 remaining) [2024-01-31 16:02:10,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 42 remaining) [2024-01-31 16:02:10,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 42 remaining) [2024-01-31 16:02:10,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (33 of 42 remaining) [2024-01-31 16:02:10,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 42 remaining) [2024-01-31 16:02:10,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 42 remaining) [2024-01-31 16:02:10,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 42 remaining) [2024-01-31 16:02:10,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 42 remaining) [2024-01-31 16:02:10,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 42 remaining) [2024-01-31 16:02:10,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 42 remaining) [2024-01-31 16:02:10,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 42 remaining) [2024-01-31 16:02:10,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 42 remaining) [2024-01-31 16:02:10,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 42 remaining) [2024-01-31 16:02:10,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 42 remaining) [2024-01-31 16:02:10,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (22 of 42 remaining) [2024-01-31 16:02:10,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 42 remaining) [2024-01-31 16:02:10,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 42 remaining) [2024-01-31 16:02:10,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 42 remaining) [2024-01-31 16:02:10,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 42 remaining) [2024-01-31 16:02:10,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 42 remaining) [2024-01-31 16:02:10,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 42 remaining) [2024-01-31 16:02:10,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 42 remaining) [2024-01-31 16:02:10,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 42 remaining) [2024-01-31 16:02:10,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 42 remaining) [2024-01-31 16:02:10,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (12 of 42 remaining) [2024-01-31 16:02:10,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 42 remaining) [2024-01-31 16:02:10,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 42 remaining) [2024-01-31 16:02:10,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 42 remaining) [2024-01-31 16:02:10,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 42 remaining) [2024-01-31 16:02:10,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 42 remaining) [2024-01-31 16:02:10,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 42 remaining) [2024-01-31 16:02:10,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 42 remaining) [2024-01-31 16:02:10,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 42 remaining) [2024-01-31 16:02:10,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 42 remaining) [2024-01-31 16:02:10,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (2 of 42 remaining) [2024-01-31 16:02:10,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 42 remaining) [2024-01-31 16:02:10,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 42 remaining) [2024-01-31 16:02:10,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:02:10,638 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-01-31 16:02:10,638 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:02:10,638 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-31 16:02:10,664 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:02:10,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 78 transitions, 184 flow [2024-01-31 16:02:10,672 INFO L124 PetriNetUnfolderBase]: 0/86 cut-off events. [2024-01-31 16:02:10,673 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-31 16:02:10,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 86 events. 0/86 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 329 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2024-01-31 16:02:10,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 78 transitions, 184 flow [2024-01-31 16:02:10,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 78 transitions, 184 flow [2024-01-31 16:02:10,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:02:10,675 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;@cffe188, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:02:10,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2024-01-31 16:02:10,676 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:02:10,676 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:02:10,676 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:10,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:10,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:02:10,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 49 more)] === [2024-01-31 16:02:10,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:10,677 INFO L85 PathProgramCache]: Analyzing trace with hash 11391, now seen corresponding path program 1 times [2024-01-31 16:02:10,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:10,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149783928] [2024-01-31 16:02:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:10,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:10,686 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 16:02:10,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:10,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149783928] [2024-01-31 16:02:10,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149783928] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:10,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:10,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:02:10,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131754086] [2024-01-31 16:02:10,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:10,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:10,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:10,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:10,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:10,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 78 [2024-01-31 16:02:10,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 16:02:10,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:10,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 78 [2024-01-31 16:02:10,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:15,037 INFO L124 PetriNetUnfolderBase]: 44288/67569 cut-off events. [2024-01-31 16:02:15,038 INFO L125 PetriNetUnfolderBase]: For 8499/8499 co-relation queries the response was YES. [2024-01-31 16:02:15,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130624 conditions, 67569 events. 44288/67569 cut-off events. For 8499/8499 co-relation queries the response was YES. Maximal size of possible extension queue 3023. Compared 565270 event pairs, 44288 based on Foata normal form. 0/45136 useless extension candidates. Maximal degree in co-relation 11632. Up to 59051 conditions per place. [2024-01-31 16:02:15,501 INFO L140 encePairwiseOnDemand]: 62/78 looper letters, 37 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-01-31 16:02:15,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 64 transitions, 234 flow [2024-01-31 16:02:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:15,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-01-31 16:02:15,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470085470085471 [2024-01-31 16:02:15,502 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 184 flow. Second operand 3 states and 128 transitions. [2024-01-31 16:02:15,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 64 transitions, 234 flow [2024-01-31 16:02:15,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 64 transitions, 228 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:15,507 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 154 flow [2024-01-31 16:02:15,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2024-01-31 16:02:15,508 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -12 predicate places. [2024-01-31 16:02:15,508 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 154 flow [2024-01-31 16:02:15,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 16:02:15,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:15,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:02:15,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:02:15,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 49 more)] === [2024-01-31 16:02:15,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:15,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1940955371, now seen corresponding path program 1 times [2024-01-31 16:02:15,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:15,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977742387] [2024-01-31 16:02:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:15,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:15,570 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 16:02:15,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:15,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977742387] [2024-01-31 16:02:15,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977742387] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:15,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:15,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:15,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731975474] [2024-01-31 16:02:15,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:15,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:15,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:15,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:15,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 78 [2024-01-31 16:02:15,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 16:02:15,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:15,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 78 [2024-01-31 16:02:15,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:19,486 INFO L124 PetriNetUnfolderBase]: 44288/65587 cut-off events. [2024-01-31 16:02:19,486 INFO L125 PetriNetUnfolderBase]: For 2545/2545 co-relation queries the response was YES. [2024-01-31 16:02:19,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127106 conditions, 65587 events. 44288/65587 cut-off events. For 2545/2545 co-relation queries the response was YES. Maximal size of possible extension queue 2816. Compared 510337 event pairs, 27056 based on Foata normal form. 0/44132 useless extension candidates. Maximal degree in co-relation 127093. Up to 53944 conditions per place. [2024-01-31 16:02:19,870 INFO L140 encePairwiseOnDemand]: 75/78 looper letters, 66 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2024-01-31 16:02:19,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 92 transitions, 361 flow [2024-01-31 16:02:19,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:19,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 169 transitions. [2024-01-31 16:02:19,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-01-31 16:02:19,872 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 154 flow. Second operand 4 states and 169 transitions. [2024-01-31 16:02:19,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 92 transitions, 361 flow [2024-01-31 16:02:19,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 92 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:19,875 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 152 flow [2024-01-31 16:02:19,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2024-01-31 16:02:19,876 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -12 predicate places. [2024-01-31 16:02:19,876 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 152 flow [2024-01-31 16:02:19,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 16:02:19,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:19,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:19,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 16:02:19,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 49 more)] === [2024-01-31 16:02:19,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:19,877 INFO L85 PathProgramCache]: Analyzing trace with hash 40074757, now seen corresponding path program 1 times [2024-01-31 16:02:19,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:19,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916896849] [2024-01-31 16:02:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:19,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:19,900 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 16:02:19,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:19,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916896849] [2024-01-31 16:02:19,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916896849] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:19,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:19,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:19,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380124316] [2024-01-31 16:02:19,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:19,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:19,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:19,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:19,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:19,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 78 [2024-01-31 16:02:19,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 16:02:19,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:19,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 78 [2024-01-31 16:02:19,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:23,122 INFO L124 PetriNetUnfolderBase]: 44288/61015 cut-off events. [2024-01-31 16:02:23,122 INFO L125 PetriNetUnfolderBase]: For 4275/4275 co-relation queries the response was YES. [2024-01-31 16:02:23,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124173 conditions, 61015 events. 44288/61015 cut-off events. For 4275/4275 co-relation queries the response was YES. Maximal size of possible extension queue 2362. Compared 424543 event pairs, 8567 based on Foata normal form. 0/44465 useless extension candidates. Maximal degree in co-relation 107744. Up to 47201 conditions per place. [2024-01-31 16:02:23,474 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 66 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2024-01-31 16:02:23,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 86 transitions, 347 flow [2024-01-31 16:02:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 132 transitions. [2024-01-31 16:02:23,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-01-31 16:02:23,476 INFO L175 Difference]: Start difference. First operand has 75 places, 63 transitions, 152 flow. Second operand 3 states and 132 transitions. [2024-01-31 16:02:23,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 86 transitions, 347 flow [2024-01-31 16:02:23,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 86 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:23,480 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 141 flow [2024-01-31 16:02:23,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2024-01-31 16:02:23,481 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -17 predicate places. [2024-01-31 16:02:23,481 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 141 flow [2024-01-31 16:02:23,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 16:02:23,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:23,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:23,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-31 16:02:23,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 49 more)] === [2024-01-31 16:02:23,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1241189110, now seen corresponding path program 1 times [2024-01-31 16:02:23,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:23,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461789733] [2024-01-31 16:02:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:23,535 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 16:02:23,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:23,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461789733] [2024-01-31 16:02:23,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461789733] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:23,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:23,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:23,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268161001] [2024-01-31 16:02:23,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:23,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:23,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:23,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:23,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:23,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 78 [2024-01-31 16:02:23,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:23,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:23,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 78 [2024-01-31 16:02:23,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:26,297 INFO L124 PetriNetUnfolderBase]: 34082/51183 cut-off events. [2024-01-31 16:02:26,298 INFO L125 PetriNetUnfolderBase]: For 3603/3603 co-relation queries the response was YES. [2024-01-31 16:02:26,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101948 conditions, 51183 events. 34082/51183 cut-off events. For 3603/3603 co-relation queries the response was YES. Maximal size of possible extension queue 2129. Compared 392341 event pairs, 13250 based on Foata normal form. 0/36523 useless extension candidates. Maximal degree in co-relation 85705. Up to 41608 conditions per place. [2024-01-31 16:02:26,821 INFO L140 encePairwiseOnDemand]: 75/78 looper letters, 67 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2024-01-31 16:02:26,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 89 transitions, 357 flow [2024-01-31 16:02:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 170 transitions. [2024-01-31 16:02:26,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448717948717948 [2024-01-31 16:02:26,823 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 141 flow. Second operand 4 states and 170 transitions. [2024-01-31 16:02:26,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 89 transitions, 357 flow [2024-01-31 16:02:26,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 89 transitions, 354 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:02:26,829 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 142 flow [2024-01-31 16:02:26,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2024-01-31 16:02:26,831 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -16 predicate places. [2024-01-31 16:02:26,831 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 142 flow [2024-01-31 16:02:26,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:26,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:26,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:26,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-31 16:02:26,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 49 more)] === [2024-01-31 16:02:26,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:26,832 INFO L85 PathProgramCache]: Analyzing trace with hash -177842837, now seen corresponding path program 1 times [2024-01-31 16:02:26,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:26,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160389620] [2024-01-31 16:02:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:26,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:26,862 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 16:02:26,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:26,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160389620] [2024-01-31 16:02:26,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160389620] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:26,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:26,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:26,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454551109] [2024-01-31 16:02:26,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:26,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:26,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:26,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:26,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 78 [2024-01-31 16:02:26,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 16:02:26,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:26,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 78 [2024-01-31 16:02:26,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:29,385 INFO L124 PetriNetUnfolderBase]: 34082/47173 cut-off events. [2024-01-31 16:02:29,386 INFO L125 PetriNetUnfolderBase]: For 3317/3317 co-relation queries the response was YES. [2024-01-31 16:02:29,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99219 conditions, 47173 events. 34082/47173 cut-off events. For 3317/3317 co-relation queries the response was YES. Maximal size of possible extension queue 1792. Compared 317453 event pairs, 6593 based on Foata normal form. 0/36472 useless extension candidates. Maximal degree in co-relation 83355. Up to 36407 conditions per place. [2024-01-31 16:02:29,610 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 61 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2024-01-31 16:02:29,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 318 flow [2024-01-31 16:02:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-01-31 16:02:29,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427350427350427 [2024-01-31 16:02:29,612 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 142 flow. Second operand 3 states and 127 transitions. [2024-01-31 16:02:29,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 318 flow [2024-01-31 16:02:29,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 77 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:29,616 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 131 flow [2024-01-31 16:02:29,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2024-01-31 16:02:29,616 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -21 predicate places. [2024-01-31 16:02:29,616 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 131 flow [2024-01-31 16:02:29,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 16:02:29,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:29,617 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:29,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-01-31 16:02:29,617 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 49 more)] === [2024-01-31 16:02:29,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:29,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1219812990, now seen corresponding path program 1 times [2024-01-31 16:02:29,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:29,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675225079] [2024-01-31 16:02:29,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:29,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:02:29,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:29,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675225079] [2024-01-31 16:02:29,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675225079] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:29,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:29,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:29,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991165244] [2024-01-31 16:02:29,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:29,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:29,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:29,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:29,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:29,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 78 [2024-01-31 16:02:29,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 16:02:29,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:29,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 78 [2024-01-31 16:02:29,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:31,982 INFO L124 PetriNetUnfolderBase]: 26228/40732 cut-off events. [2024-01-31 16:02:31,982 INFO L125 PetriNetUnfolderBase]: For 2943/2943 co-relation queries the response was YES. [2024-01-31 16:02:32,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82495 conditions, 40732 events. 26228/40732 cut-off events. For 2943/2943 co-relation queries the response was YES. Maximal size of possible extension queue 1710. Compared 326586 event pairs, 524 based on Foata normal form. 0/30436 useless extension candidates. Maximal degree in co-relation 69395. Up to 31864 conditions per place. [2024-01-31 16:02:32,219 INFO L140 encePairwiseOnDemand]: 75/78 looper letters, 68 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-01-31 16:02:32,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 86 transitions, 354 flow [2024-01-31 16:02:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:32,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 171 transitions. [2024-01-31 16:02:32,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-01-31 16:02:32,222 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 131 flow. Second operand 4 states and 171 transitions. [2024-01-31 16:02:32,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 86 transitions, 354 flow [2024-01-31 16:02:32,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:02:32,229 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 132 flow [2024-01-31 16:02:32,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2024-01-31 16:02:32,230 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -20 predicate places. [2024-01-31 16:02:32,230 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 132 flow [2024-01-31 16:02:32,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 16:02:32,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:32,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:32,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-01-31 16:02:32,230 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err7ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 49 more)] === [2024-01-31 16:02:32,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash -133422254, now seen corresponding path program 1 times [2024-01-31 16:02:32,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:32,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617818638] [2024-01-31 16:02:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:32,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:32,248 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 16:02:32,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:32,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617818638] [2024-01-31 16:02:32,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617818638] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:32,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:32,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:32,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854898390] [2024-01-31 16:02:32,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:32,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:32,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:32,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:32,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:32,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 78 [2024-01-31 16:02:32,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 16:02:32,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:32,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 78 [2024-01-31 16:02:32,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:33,531 INFO L124 PetriNetUnfolderBase]: 15035/23816 cut-off events. [2024-01-31 16:02:33,532 INFO L125 PetriNetUnfolderBase]: For 1828/1828 co-relation queries the response was YES. [2024-01-31 16:02:33,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49313 conditions, 23816 events. 15035/23816 cut-off events. For 1828/1828 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 175528 event pairs, 4991 based on Foata normal form. 0/20298 useless extension candidates. Maximal degree in co-relation 40150. Up to 19068 conditions per place. [2024-01-31 16:02:33,648 INFO L140 encePairwiseOnDemand]: 70/78 looper letters, 45 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-01-31 16:02:33,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 281 flow [2024-01-31 16:02:33,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-01-31 16:02:33,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2024-01-31 16:02:33,649 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 132 flow. Second operand 3 states and 131 transitions. [2024-01-31 16:02:33,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 281 flow [2024-01-31 16:02:33,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 275 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:33,651 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 149 flow [2024-01-31 16:02:33,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2024-01-31 16:02:33,652 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -23 predicate places. [2024-01-31 16:02:33,652 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 149 flow [2024-01-31 16:02:33,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 16:02:33,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:33,652 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:33,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-01-31 16:02:33,652 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 49 more)] === [2024-01-31 16:02:33,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:33,653 INFO L85 PathProgramCache]: Analyzing trace with hash 840503340, now seen corresponding path program 1 times [2024-01-31 16:02:33,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:33,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848597920] [2024-01-31 16:02:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:33,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:02:33,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:33,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848597920] [2024-01-31 16:02:33,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848597920] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:33,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:33,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:33,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833845062] [2024-01-31 16:02:33,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:33,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:33,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:33,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:33,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:33,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 78 [2024-01-31 16:02:33,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 16:02:33,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:33,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 78 [2024-01-31 16:02:33,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:34,697 INFO L124 PetriNetUnfolderBase]: 15035/21968 cut-off events. [2024-01-31 16:02:34,698 INFO L125 PetriNetUnfolderBase]: For 3198/3198 co-relation queries the response was YES. [2024-01-31 16:02:34,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50823 conditions, 21968 events. 15035/21968 cut-off events. For 3198/3198 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 143279 event pairs, 3647 based on Foata normal form. 648/21350 useless extension candidates. Maximal degree in co-relation 41552. Up to 15552 conditions per place. [2024-01-31 16:02:34,820 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 56 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2024-01-31 16:02:34,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 321 flow [2024-01-31 16:02:34,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:34,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-01-31 16:02:34,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49145299145299143 [2024-01-31 16:02:34,822 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 149 flow. Second operand 3 states and 115 transitions. [2024-01-31 16:02:34,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 321 flow [2024-01-31 16:02:34,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 68 transitions, 321 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:02:34,825 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 141 flow [2024-01-31 16:02:34,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2024-01-31 16:02:34,826 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -26 predicate places. [2024-01-31 16:02:34,826 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 141 flow [2024-01-31 16:02:34,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 16:02:34,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:34,826 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:34,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-01-31 16:02:34,826 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 49 more)] === [2024-01-31 16:02:34,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:34,827 INFO L85 PathProgramCache]: Analyzing trace with hash 285718231, now seen corresponding path program 1 times [2024-01-31 16:02:34,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:34,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098371073] [2024-01-31 16:02:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:34,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:34,837 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:02:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:34,849 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:02:34,849 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:02:34,849 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (51 of 52 remaining) [2024-01-31 16:02:34,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (50 of 52 remaining) [2024-01-31 16:02:34,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (49 of 52 remaining) [2024-01-31 16:02:34,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (48 of 52 remaining) [2024-01-31 16:02:34,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (47 of 52 remaining) [2024-01-31 16:02:34,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (46 of 52 remaining) [2024-01-31 16:02:34,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (45 of 52 remaining) [2024-01-31 16:02:34,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (44 of 52 remaining) [2024-01-31 16:02:34,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (43 of 52 remaining) [2024-01-31 16:02:34,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (42 of 52 remaining) [2024-01-31 16:02:34,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (41 of 52 remaining) [2024-01-31 16:02:34,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 52 remaining) [2024-01-31 16:02:34,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 52 remaining) [2024-01-31 16:02:34,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 52 remaining) [2024-01-31 16:02:34,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 52 remaining) [2024-01-31 16:02:34,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 52 remaining) [2024-01-31 16:02:34,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 52 remaining) [2024-01-31 16:02:34,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 52 remaining) [2024-01-31 16:02:34,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 52 remaining) [2024-01-31 16:02:34,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (32 of 52 remaining) [2024-01-31 16:02:34,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 52 remaining) [2024-01-31 16:02:34,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 52 remaining) [2024-01-31 16:02:34,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 52 remaining) [2024-01-31 16:02:34,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 52 remaining) [2024-01-31 16:02:34,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 52 remaining) [2024-01-31 16:02:34,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 52 remaining) [2024-01-31 16:02:34,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 52 remaining) [2024-01-31 16:02:34,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 52 remaining) [2024-01-31 16:02:34,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 52 remaining) [2024-01-31 16:02:34,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (22 of 52 remaining) [2024-01-31 16:02:34,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 52 remaining) [2024-01-31 16:02:34,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 52 remaining) [2024-01-31 16:02:34,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 52 remaining) [2024-01-31 16:02:34,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 52 remaining) [2024-01-31 16:02:34,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 52 remaining) [2024-01-31 16:02:34,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 52 remaining) [2024-01-31 16:02:34,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 52 remaining) [2024-01-31 16:02:34,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 52 remaining) [2024-01-31 16:02:34,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 52 remaining) [2024-01-31 16:02:34,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (12 of 52 remaining) [2024-01-31 16:02:34,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 52 remaining) [2024-01-31 16:02:34,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 52 remaining) [2024-01-31 16:02:34,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 52 remaining) [2024-01-31 16:02:34,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 52 remaining) [2024-01-31 16:02:34,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 52 remaining) [2024-01-31 16:02:34,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 52 remaining) [2024-01-31 16:02:34,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 52 remaining) [2024-01-31 16:02:34,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 52 remaining) [2024-01-31 16:02:34,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 52 remaining) [2024-01-31 16:02:34,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONERROR_FUNCTION (2 of 52 remaining) [2024-01-31 16:02:34,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 52 remaining) [2024-01-31 16:02:34,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 52 remaining) [2024-01-31 16:02:34,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-01-31 16:02:34,856 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:34,856 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:02:34,856 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-01-31 16:02:34,883 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:02:34,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 96 transitions, 232 flow [2024-01-31 16:02:34,892 INFO L124 PetriNetUnfolderBase]: 0/106 cut-off events. [2024-01-31 16:02:34,892 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-31 16:02:34,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 106 events. 0/106 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 447 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2024-01-31 16:02:34,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 96 transitions, 232 flow [2024-01-31 16:02:34,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 96 transitions, 232 flow [2024-01-31 16:02:34,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:02:34,896 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;@cffe188, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:02:34,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-01-31 16:02:34,896 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:02:34,896 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:02:34,896 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:34,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:34,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:02:34,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 59 more)] === [2024-01-31 16:02:34,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:34,897 INFO L85 PathProgramCache]: Analyzing trace with hash 14463, now seen corresponding path program 1 times [2024-01-31 16:02:34,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:34,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086470559] [2024-01-31 16:02:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:34,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:34,906 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 16:02:34,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:34,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086470559] [2024-01-31 16:02:34,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086470559] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:34,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:34,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:02:34,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898276401] [2024-01-31 16:02:34,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:34,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:34,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:34,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:34,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:34,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-01-31 16:02:34,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 16:02:34,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:34,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-01-31 16:02:34,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand