./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/01b_inc.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/01b_inc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3d25acf6 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/01b_inc.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/01b_inc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-3d25acf-m [2024-01-30 14:15:40,247 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-30 14:15:40,316 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-30 14:15:40,321 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-30 14:15:40,321 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-30 14:15:40,350 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-30 14:15:40,351 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-30 14:15:40,351 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-30 14:15:40,352 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-30 14:15:40,355 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-30 14:15:40,355 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-30 14:15:40,355 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-30 14:15:40,356 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-30 14:15:40,357 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-30 14:15:40,357 INFO L153 SettingsManager]: * Use SBE=true [2024-01-30 14:15:40,358 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-30 14:15:40,358 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-30 14:15:40,358 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-30 14:15:40,358 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-30 14:15:40,358 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-30 14:15:40,360 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-30 14:15:40,360 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-30 14:15:40,360 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-30 14:15:40,360 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-30 14:15:40,361 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-30 14:15:40,361 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-30 14:15:40,361 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-30 14:15:40,361 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-30 14:15:40,362 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-30 14:15:40,362 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-30 14:15:40,363 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-30 14:15:40,363 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-30 14:15:40,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-30 14:15:40,363 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-30 14:15:40,363 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-30 14:15:40,364 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-30 14:15:40,364 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-30 14:15:40,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-30 14:15:40,364 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-30 14:15:40,364 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-30 14:15:40,364 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-30 14:15:40,365 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-30 14:15:40,365 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-30 14:15:40,365 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-30 14:15:40,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-30 14:15:40,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-30 14:15:40,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-30 14:15:40,616 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-30 14:15:40,617 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-30 14:15:40,618 INFO L431 ainManager$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/01b_inc.yml/witness.yml [2024-01-30 14:15:40,749 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-30 14:15:40,749 INFO L274 PluginConnector]: CDTParser initialized [2024-01-30 14:15:40,749 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2024-01-30 14:15:41,780 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-30 14:15:42,026 INFO L384 CDTParser]: Found 1 translation units. [2024-01-30 14:15:42,028 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2024-01-30 14:15:42,044 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789102f74/95c7e6dea532470aa36c43c7e00459e8/FLAG474c0c737 [2024-01-30 14:15:42,058 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789102f74/95c7e6dea532470aa36c43c7e00459e8 [2024-01-30 14:15:42,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-30 14:15:42,060 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-30 14:15:42,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-30 14:15:42,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-30 14:15:42,065 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-30 14:15:42,066 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 30.01 02:15:40" (1/2) ... [2024-01-30 14:15:42,067 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d8c541d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:42, skipping insertion in model container [2024-01-30 14:15:42,067 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 30.01 02:15:40" (1/2) ... [2024-01-30 14:15:42,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e657da0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 30.01 02:15:42, skipping insertion in model container [2024-01-30 14:15:42,068 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 02:15:42" (2/2) ... [2024-01-30 14:15:42,069 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d8c541d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42, skipping insertion in model container [2024-01-30 14:15:42,069 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 02:15:42" (2/2) ... [2024-01-30 14:15:42,069 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-30 14:15:42,105 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-30 14:15:42,107 INFO L98 nessWitnessExtractor]: Location invariant before [L723-L723] (((unsigned long )arg == 0UL) && ((unsigned long )arg == 0UL)) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:42,107 INFO L98 nessWitnessExtractor]: Location invariant before [L723-L723] (((unsigned long )arg == 0UL) && ((unsigned long )arg == 0UL)) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:42,108 INFO L98 nessWitnessExtractor]: Location invariant before [L717-L717] ((0U == v) && (v == 0U)) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:42,108 INFO L98 nessWitnessExtractor]: Location invariant before [L724-L724] (unsigned long )arg == 0UL [2024-01-30 14:15:42,108 INFO L98 nessWitnessExtractor]: Location invariant before [L726-L726] ((unsigned long )arg == 0UL) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:42,109 INFO L98 nessWitnessExtractor]: Location invariant before [L718-L729] ((0U == v) && (v == 0U)) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:42,109 INFO L98 nessWitnessExtractor]: Location invariant before [L723-L723] (((unsigned long )arg == 0UL) && ((unsigned long )arg == 0UL)) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:42,109 INFO L98 nessWitnessExtractor]: Location invariant before [L725-L725] (unsigned long )arg == 0UL [2024-01-30 14:15:42,109 INFO L98 nessWitnessExtractor]: Location invariant before [L719-L719] ((0U == v) && (v == 0U)) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:42,109 INFO L98 nessWitnessExtractor]: Location invariant after [L710-L714] (unsigned int )m == 0U [2024-01-30 14:15:42,110 INFO L98 nessWitnessExtractor]: Location invariant after [L705-L709] (unsigned int )m == 1U [2024-01-30 14:15:42,110 INFO L98 nessWitnessExtractor]: Location invariant before [L722-L722] ((0U == v) && (v == 0U)) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:42,110 INFO L98 nessWitnessExtractor]: Location invariant before [L716-L716] (unsigned long )arg == 0UL [2024-01-30 14:15:42,110 INFO L98 nessWitnessExtractor]: Location invariant before [L728-L728] (v <= 4294967294U) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:42,110 INFO L98 nessWitnessExtractor]: Location invariant before [L726-L726] ((unsigned long )arg == 0UL) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:42,110 INFO L98 nessWitnessExtractor]: Location invariant before [L720-L720] ((0U == v) && (v == 0U)) && ((unsigned long )arg == 0UL) [2024-01-30 14:15:42,110 INFO L98 nessWitnessExtractor]: Location invariant before [L727-L727] (((1U <= (unsigned int )value) && (v <= 4294967294U)) && ((unsigned long )arg == 0UL)) && ((unsigned int )value != 0U) [2024-01-30 14:15:42,146 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-30 14:15:42,434 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/01b_inc.i[31005,31018] [2024-01-30 14:15:42,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-30 14:15:42,451 INFO L202 MainTranslator]: Completed pre-run [2024-01-30 14:15:42,483 WARN L424 MainDispatcher]: Unable to annotate void __VERIFIER_atomic_acquire() { assume_abort_if_not(m==0); m = 1; } with a witness entry [2024-01-30 14:15:42,487 WARN L424 MainDispatcher]: Unable to annotate void __VERIFIER_atomic_release() { assume_abort_if_not(m==1); m = 0; } with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-30 14:15:42,522 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/01b_inc.i[31005,31018] Start Parsing Local [2024-01-30 14:15:42,523 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-30 14:15:42,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-30 14:15:42,554 INFO L206 MainTranslator]: Completed translation [2024-01-30 14:15:42,555 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42 WrapperNode [2024-01-30 14:15:42,555 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-30 14:15:42,556 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-30 14:15:42,556 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-30 14:15:42,556 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-30 14:15:42,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (1/1) ... [2024-01-30 14:15:42,583 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (1/1) ... [2024-01-30 14:15:42,607 INFO L138 Inliner]: procedures = 172, calls = 19, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 73 [2024-01-30 14:15:42,609 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-30 14:15:42,609 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-30 14:15:42,610 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-30 14:15:42,610 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-30 14:15:42,617 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (1/1) ... [2024-01-30 14:15:42,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (1/1) ... [2024-01-30 14:15:42,622 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (1/1) ... [2024-01-30 14:15:42,632 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]. [2024-01-30 14:15:42,632 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (1/1) ... [2024-01-30 14:15:42,632 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (1/1) ... [2024-01-30 14:15:42,636 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (1/1) ... [2024-01-30 14:15:42,645 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (1/1) ... [2024-01-30 14:15:42,647 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (1/1) ... [2024-01-30 14:15:42,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (1/1) ... [2024-01-30 14:15:42,649 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-30 14:15:42,650 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-30 14:15:42,650 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-30 14:15:42,650 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-30 14:15:42,651 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (1/1) ... [2024-01-30 14:15:42,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-30 14:15:42,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-30 14:15:42,703 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) [2024-01-30 14:15:42,723 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 [2024-01-30 14:15:42,739 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-30 14:15:42,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-30 14:15:42,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-30 14:15:42,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-30 14:15:42,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-30 14:15:42,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-30 14:15:42,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-30 14:15:42,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-30 14:15:42,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-30 14:15:42,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-30 14:15:42,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-30 14:15:42,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-30 14:15:42,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-30 14:15:42,747 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-30 14:15:42,838 INFO L244 CfgBuilder]: Building ICFG [2024-01-30 14:15:42,840 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-30 14:15:43,163 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-30 14:15:43,164 INFO L293 CfgBuilder]: Performing block encoding [2024-01-30 14:15:43,345 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-30 14:15:43,346 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-01-30 14:15:43,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 02:15:43 BoogieIcfgContainer [2024-01-30 14:15:43,347 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-30 14:15:43,349 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-30 14:15:43,352 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-30 14:15:43,354 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-30 14:15:43,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 30.01 02:15:40" (1/4) ... [2024-01-30 14:15:43,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24afb876 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 30.01 02:15:43, skipping insertion in model container [2024-01-30 14:15:43,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 02:15:42" (2/4) ... [2024-01-30 14:15:43,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24afb876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 02:15:43, skipping insertion in model container [2024-01-30 14:15:43,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 02:15:42" (3/4) ... [2024-01-30 14:15:43,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24afb876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 02:15:43, skipping insertion in model container [2024-01-30 14:15:43,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 02:15:43" (4/4) ... [2024-01-30 14:15:43,359 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2024-01-30 14:15:43,374 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-30 14:15:43,374 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-01-30 14:15:43,375 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-30 14:15:43,426 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-30 14:15:43,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 38 transitions, 80 flow [2024-01-30 14:15:43,476 INFO L124 PetriNetUnfolderBase]: 1/40 cut-off events. [2024-01-30 14:15:43,476 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-30 14:15:43,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 40 events. 1/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-01-30 14:15:43,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 38 transitions, 80 flow [2024-01-30 14:15:43,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 38 transitions, 80 flow [2024-01-30 14:15:43,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-30 14:15:43,504 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;@62e65051, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-30 14:15:43,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2024-01-30 14:15:43,526 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-30 14:15:43,526 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-01-30 14:15:43,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-30 14:15:43,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:43,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-30 14:15:43,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 24 more)] === [2024-01-30 14:15:43,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash 240611906, now seen corresponding path program 1 times [2024-01-30 14:15:43,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:43,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259761928] [2024-01-30 14:15:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:43,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:43,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259761928] [2024-01-30 14:15:43,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259761928] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:43,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:43,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:43,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986358556] [2024-01-30 14:15:43,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:43,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:43,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:43,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:43,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:43,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-01-30 14:15:43,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2024-01-30 14:15:43,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:43,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-01-30 14:15:43,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:43,954 INFO L124 PetriNetUnfolderBase]: 21/102 cut-off events. [2024-01-30 14:15:43,954 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-30 14:15:43,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 102 events. 21/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 318 event pairs, 0 based on Foata normal form. 9/96 useless extension candidates. Maximal degree in co-relation 148. Up to 48 conditions per place. [2024-01-30 14:15:43,959 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 15 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-01-30 14:15:43,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 106 flow [2024-01-30 14:15:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-01-30 14:15:43,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.618421052631579 [2024-01-30 14:15:43,971 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 80 flow. Second operand 4 states and 94 transitions. [2024-01-30 14:15:43,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 106 flow [2024-01-30 14:15:43,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 106 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-30 14:15:43,976 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 70 flow [2024-01-30 14:15:43,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-01-30 14:15:43,981 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-01-30 14:15:43,981 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 70 flow [2024-01-30 14:15:43,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2024-01-30 14:15:43,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:43,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-30 14:15:43,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-30 14:15:43,983 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 24 more)] === [2024-01-30 14:15:43,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1130995161, now seen corresponding path program 1 times [2024-01-30 14:15:43,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:43,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605513687] [2024-01-30 14:15:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:43,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-30 14:15:44,032 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-30 14:15:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-30 14:15:44,059 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-30 14:15:44,060 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-30 14:15:44,061 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (26 of 27 remaining) [2024-01-30 14:15:44,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 27 remaining) [2024-01-30 14:15:44,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 27 remaining) [2024-01-30 14:15:44,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 27 remaining) [2024-01-30 14:15:44,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 27 remaining) [2024-01-30 14:15:44,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 27 remaining) [2024-01-30 14:15:44,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 27 remaining) [2024-01-30 14:15:44,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 27 remaining) [2024-01-30 14:15:44,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 27 remaining) [2024-01-30 14:15:44,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 27 remaining) [2024-01-30 14:15:44,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 27 remaining) [2024-01-30 14:15:44,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (15 of 27 remaining) [2024-01-30 14:15:44,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 27 remaining) [2024-01-30 14:15:44,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 27 remaining) [2024-01-30 14:15:44,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 27 remaining) [2024-01-30 14:15:44,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 27 remaining) [2024-01-30 14:15:44,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 27 remaining) [2024-01-30 14:15:44,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 27 remaining) [2024-01-30 14:15:44,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 27 remaining) [2024-01-30 14:15:44,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 27 remaining) [2024-01-30 14:15:44,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 27 remaining) [2024-01-30 14:15:44,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 27 remaining) [2024-01-30 14:15:44,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 27 remaining) [2024-01-30 14:15:44,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 27 remaining) [2024-01-30 14:15:44,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (2 of 27 remaining) [2024-01-30 14:15:44,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 27 remaining) [2024-01-30 14:15:44,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 27 remaining) [2024-01-30 14:15:44,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-30 14:15:44,078 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-30 14:15:44,080 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-30 14:15:44,081 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-30 14:15:44,116 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-30 14:15:44,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 71 transitions, 152 flow [2024-01-30 14:15:44,142 INFO L124 PetriNetUnfolderBase]: 2/76 cut-off events. [2024-01-30 14:15:44,143 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-30 14:15:44,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 76 events. 2/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 210 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 67. Up to 3 conditions per place. [2024-01-30 14:15:44,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 71 transitions, 152 flow [2024-01-30 14:15:44,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 71 transitions, 152 flow [2024-01-30 14:15:44,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-30 14:15:44,148 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;@62e65051, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-30 14:15:44,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-01-30 14:15:44,152 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-30 14:15:44,152 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-01-30 14:15:44,152 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-30 14:15:44,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:44,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-30 14:15:44,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 37 more)] === [2024-01-30 14:15:44,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:44,153 INFO L85 PathProgramCache]: Analyzing trace with hash 308399337, now seen corresponding path program 1 times [2024-01-30 14:15:44,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:44,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920960815] [2024-01-30 14:15:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:44,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:44,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:44,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920960815] [2024-01-30 14:15:44,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920960815] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:44,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:44,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:44,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660764515] [2024-01-30 14:15:44,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:44,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:44,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:44,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:44,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:44,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 71 [2024-01-30 14:15:44,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 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) [2024-01-30 14:15:44,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:44,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 71 [2024-01-30 14:15:44,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:44,541 INFO L124 PetriNetUnfolderBase]: 531/1423 cut-off events. [2024-01-30 14:15:44,541 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-01-30 14:15:44,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2322 conditions, 1423 events. 531/1423 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 10315 event pairs, 18 based on Foata normal form. 99/1271 useless extension candidates. Maximal degree in co-relation 2103. Up to 807 conditions per place. [2024-01-30 14:15:44,557 INFO L140 encePairwiseOnDemand]: 61/71 looper letters, 37 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2024-01-30 14:15:44,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 77 transitions, 247 flow [2024-01-30 14:15:44,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:44,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 202 transitions. [2024-01-30 14:15:44,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7112676056338029 [2024-01-30 14:15:44,564 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 152 flow. Second operand 4 states and 202 transitions. [2024-01-30 14:15:44,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 77 transitions, 247 flow [2024-01-30 14:15:44,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 77 transitions, 247 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-30 14:15:44,568 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 140 flow [2024-01-30 14:15:44,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=66, 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=140, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-01-30 14:15:44,568 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2024-01-30 14:15:44,570 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 140 flow [2024-01-30 14:15:44,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 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) [2024-01-30 14:15:44,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:44,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-30 14:15:44,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-30 14:15:44,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 37 more)] === [2024-01-30 14:15:44,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:44,571 INFO L85 PathProgramCache]: Analyzing trace with hash 970445220, now seen corresponding path program 1 times [2024-01-30 14:15:44,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:44,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113633033] [2024-01-30 14:15:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:44,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:44,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:44,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113633033] [2024-01-30 14:15:44,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113633033] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:44,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:44,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-30 14:15:44,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898627618] [2024-01-30 14:15:44,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:44,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-30 14:15:44,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:44,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-30 14:15:44,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-30 14:15:44,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2024-01-30 14:15:44,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2024-01-30 14:15:44,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:44,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2024-01-30 14:15:44,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:44,828 INFO L124 PetriNetUnfolderBase]: 604/1437 cut-off events. [2024-01-30 14:15:44,828 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-01-30 14:15:44,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2516 conditions, 1437 events. 604/1437 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 9878 event pairs, 368 based on Foata normal form. 99/1239 useless extension candidates. Maximal degree in co-relation 2156. Up to 659 conditions per place. [2024-01-30 14:15:44,838 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 37 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-01-30 14:15:44,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 71 transitions, 239 flow [2024-01-30 14:15:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-30 14:15:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-30 14:15:44,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-01-30 14:15:44,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6572769953051644 [2024-01-30 14:15:44,843 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 140 flow. Second operand 3 states and 140 transitions. [2024-01-30 14:15:44,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 71 transitions, 239 flow [2024-01-30 14:15:44,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:44,846 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 131 flow [2024-01-30 14:15:44,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-01-30 14:15:44,848 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -10 predicate places. [2024-01-30 14:15:44,849 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 131 flow [2024-01-30 14:15:44,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2024-01-30 14:15:44,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:44,849 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:44,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-30 14:15:44,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 37 more)] === [2024-01-30 14:15:44,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash 530708458, now seen corresponding path program 1 times [2024-01-30 14:15:44,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:44,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686942584] [2024-01-30 14:15:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-30 14:15:44,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:44,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686942584] [2024-01-30 14:15:44,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686942584] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:44,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:44,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:44,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004138867] [2024-01-30 14:15:44,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:44,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:44,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:44,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:44,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:44,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 71 [2024-01-30 14:15:44,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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) [2024-01-30 14:15:44,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:44,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 71 [2024-01-30 14:15:44,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:45,116 INFO L124 PetriNetUnfolderBase]: 498/1337 cut-off events. [2024-01-30 14:15:45,117 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-01-30 14:15:45,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2271 conditions, 1337 events. 498/1337 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 9727 event pairs, 18 based on Foata normal form. 90/1235 useless extension candidates. Maximal degree in co-relation 2256. Up to 723 conditions per place. [2024-01-30 14:15:45,123 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 44 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-01-30 14:15:45,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 265 flow [2024-01-30 14:15:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 203 transitions. [2024-01-30 14:15:45,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7147887323943662 [2024-01-30 14:15:45,125 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 131 flow. Second operand 4 states and 203 transitions. [2024-01-30 14:15:45,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 265 flow [2024-01-30 14:15:45,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 253 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:45,126 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 121 flow [2024-01-30 14:15:45,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-01-30 14:15:45,127 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -14 predicate places. [2024-01-30 14:15:45,127 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 121 flow [2024-01-30 14:15:45,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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) [2024-01-30 14:15:45,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:45,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:45,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-30 14:15:45,128 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 37 more)] === [2024-01-30 14:15:45,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash -727906653, now seen corresponding path program 1 times [2024-01-30 14:15:45,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:45,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385959496] [2024-01-30 14:15:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:45,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-30 14:15:45,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:45,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385959496] [2024-01-30 14:15:45,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385959496] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:45,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:45,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-30 14:15:45,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547593199] [2024-01-30 14:15:45,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:45,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-30 14:15:45,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:45,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-30 14:15:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-30 14:15:45,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2024-01-30 14:15:45,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2024-01-30 14:15:45,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:45,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2024-01-30 14:15:45,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:45,325 INFO L124 PetriNetUnfolderBase]: 541/1219 cut-off events. [2024-01-30 14:15:45,326 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-01-30 14:15:45,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2184 conditions, 1219 events. 541/1219 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8014 event pairs, 334 based on Foata normal form. 81/1163 useless extension candidates. Maximal degree in co-relation 2169. Up to 607 conditions per place. [2024-01-30 14:15:45,331 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 34 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-01-30 14:15:45,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 205 flow [2024-01-30 14:15:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-30 14:15:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-30 14:15:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2024-01-30 14:15:45,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6431924882629108 [2024-01-30 14:15:45,333 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 121 flow. Second operand 3 states and 137 transitions. [2024-01-30 14:15:45,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 205 flow [2024-01-30 14:15:45,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 59 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:45,336 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 112 flow [2024-01-30 14:15:45,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=3, PETRI_FLOW=112, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-01-30 14:15:45,338 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -19 predicate places. [2024-01-30 14:15:45,339 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 112 flow [2024-01-30 14:15:45,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2024-01-30 14:15:45,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:45,340 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-30 14:15:45,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-30 14:15:45,341 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 37 more)] === [2024-01-30 14:15:45,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:45,342 INFO L85 PathProgramCache]: Analyzing trace with hash -727936538, now seen corresponding path program 1 times [2024-01-30 14:15:45,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:45,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890502191] [2024-01-30 14:15:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:45,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-30 14:15:45,354 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-30 14:15:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-30 14:15:45,369 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-30 14:15:45,369 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-30 14:15:45,369 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (39 of 40 remaining) [2024-01-30 14:15:45,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 40 remaining) [2024-01-30 14:15:45,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 40 remaining) [2024-01-30 14:15:45,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 40 remaining) [2024-01-30 14:15:45,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 40 remaining) [2024-01-30 14:15:45,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 40 remaining) [2024-01-30 14:15:45,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 40 remaining) [2024-01-30 14:15:45,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 40 remaining) [2024-01-30 14:15:45,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 40 remaining) [2024-01-30 14:15:45,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 40 remaining) [2024-01-30 14:15:45,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 40 remaining) [2024-01-30 14:15:45,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (28 of 40 remaining) [2024-01-30 14:15:45,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 40 remaining) [2024-01-30 14:15:45,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 40 remaining) [2024-01-30 14:15:45,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 40 remaining) [2024-01-30 14:15:45,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 40 remaining) [2024-01-30 14:15:45,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 40 remaining) [2024-01-30 14:15:45,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 40 remaining) [2024-01-30 14:15:45,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 40 remaining) [2024-01-30 14:15:45,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 40 remaining) [2024-01-30 14:15:45,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 40 remaining) [2024-01-30 14:15:45,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 40 remaining) [2024-01-30 14:15:45,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 40 remaining) [2024-01-30 14:15:45,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 40 remaining) [2024-01-30 14:15:45,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (15 of 40 remaining) [2024-01-30 14:15:45,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 40 remaining) [2024-01-30 14:15:45,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 40 remaining) [2024-01-30 14:15:45,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 40 remaining) [2024-01-30 14:15:45,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 40 remaining) [2024-01-30 14:15:45,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 40 remaining) [2024-01-30 14:15:45,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 40 remaining) [2024-01-30 14:15:45,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 40 remaining) [2024-01-30 14:15:45,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 40 remaining) [2024-01-30 14:15:45,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 40 remaining) [2024-01-30 14:15:45,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 40 remaining) [2024-01-30 14:15:45,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 40 remaining) [2024-01-30 14:15:45,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 40 remaining) [2024-01-30 14:15:45,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (2 of 40 remaining) [2024-01-30 14:15:45,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 40 remaining) [2024-01-30 14:15:45,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 40 remaining) [2024-01-30 14:15:45,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-30 14:15:45,379 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-01-30 14:15:45,379 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-30 14:15:45,379 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-30 14:15:45,422 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-30 14:15:45,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 104 transitions, 226 flow [2024-01-30 14:15:45,436 INFO L124 PetriNetUnfolderBase]: 3/112 cut-off events. [2024-01-30 14:15:45,436 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-30 14:15:45,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 3/112 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 415 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 99. Up to 4 conditions per place. [2024-01-30 14:15:45,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 104 transitions, 226 flow [2024-01-30 14:15:45,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 104 transitions, 226 flow [2024-01-30 14:15:45,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-30 14:15:45,440 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;@62e65051, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-30 14:15:45,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2024-01-30 14:15:45,442 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-30 14:15:45,442 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-01-30 14:15:45,442 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-30 14:15:45,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:45,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-30 14:15:45,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 50 more)] === [2024-01-30 14:15:45,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:45,443 INFO L85 PathProgramCache]: Analyzing trace with hash 407677809, now seen corresponding path program 1 times [2024-01-30 14:15:45,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:45,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252660773] [2024-01-30 14:15:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:45,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:45,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:45,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252660773] [2024-01-30 14:15:45,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252660773] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:45,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:45,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:45,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000052208] [2024-01-30 14:15:45,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:45,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:45,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:45,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:45,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:45,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 104 [2024-01-30 14:15:45,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 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) [2024-01-30 14:15:45,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:45,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 104 [2024-01-30 14:15:45,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:46,827 INFO L124 PetriNetUnfolderBase]: 8631/17632 cut-off events. [2024-01-30 14:15:46,827 INFO L125 PetriNetUnfolderBase]: For 844/844 co-relation queries the response was YES. [2024-01-30 14:15:46,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30032 conditions, 17632 events. 8631/17632 cut-off events. For 844/844 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 169624 event pairs, 468 based on Foata normal form. 999/15428 useless extension candidates. Maximal degree in co-relation 4814. Up to 11097 conditions per place. [2024-01-30 14:15:46,936 INFO L140 encePairwiseOnDemand]: 93/104 looper letters, 59 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2024-01-30 14:15:46,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 120 transitions, 392 flow [2024-01-30 14:15:46,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:46,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 310 transitions. [2024-01-30 14:15:46,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7451923076923077 [2024-01-30 14:15:46,938 INFO L175 Difference]: Start difference. First operand has 108 places, 104 transitions, 226 flow. Second operand 4 states and 310 transitions. [2024-01-30 14:15:46,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 120 transitions, 392 flow [2024-01-30 14:15:46,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 120 transitions, 388 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-01-30 14:15:46,941 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 210 flow [2024-01-30 14:15:46,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2024-01-30 14:15:46,942 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -6 predicate places. [2024-01-30 14:15:46,942 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 210 flow [2024-01-30 14:15:46,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 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) [2024-01-30 14:15:46,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:46,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-30 14:15:46,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-30 14:15:46,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 50 more)] === [2024-01-30 14:15:46,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:46,943 INFO L85 PathProgramCache]: Analyzing trace with hash -246889340, now seen corresponding path program 1 times [2024-01-30 14:15:46,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:46,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888872666] [2024-01-30 14:15:46,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:46,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:46,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:46,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888872666] [2024-01-30 14:15:46,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888872666] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:46,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:46,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-30 14:15:46,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480673540] [2024-01-30 14:15:46,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:46,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-30 14:15:46,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:46,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-30 14:15:46,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-30 14:15:47,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 104 [2024-01-30 14:15:47,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:47,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:47,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 104 [2024-01-30 14:15:47,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:48,524 INFO L124 PetriNetUnfolderBase]: 10024/18441 cut-off events. [2024-01-30 14:15:48,524 INFO L125 PetriNetUnfolderBase]: For 2077/2077 co-relation queries the response was YES. [2024-01-30 14:15:48,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33201 conditions, 18441 events. 10024/18441 cut-off events. For 2077/2077 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 165349 event pairs, 6068 based on Foata normal form. 999/15635 useless extension candidates. Maximal degree in co-relation 29981. Up to 9239 conditions per place. [2024-01-30 14:15:48,636 INFO L140 encePairwiseOnDemand]: 97/104 looper letters, 59 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2024-01-30 14:15:48,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 114 transitions, 380 flow [2024-01-30 14:15:48,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-30 14:15:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-30 14:15:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-01-30 14:15:48,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7211538461538461 [2024-01-30 14:15:48,638 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 210 flow. Second operand 3 states and 225 transitions. [2024-01-30 14:15:48,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 114 transitions, 380 flow [2024-01-30 14:15:48,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 114 transitions, 377 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:48,643 INFO L231 Difference]: Finished difference. Result has 97 places, 90 transitions, 201 flow [2024-01-30 14:15:48,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2024-01-30 14:15:48,644 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -11 predicate places. [2024-01-30 14:15:48,644 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 201 flow [2024-01-30 14:15:48,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:48,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:48,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:48,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-30 14:15:48,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 50 more)] === [2024-01-30 14:15:48,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1096663062, now seen corresponding path program 1 times [2024-01-30 14:15:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:48,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625286415] [2024-01-30 14:15:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:48,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-30 14:15:48,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:48,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625286415] [2024-01-30 14:15:48,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625286415] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:48,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:48,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:48,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310314557] [2024-01-30 14:15:48,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:48,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:48,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:48,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:48,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:48,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 104 [2024-01-30 14:15:48,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 90 transitions, 201 flow. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 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) [2024-01-30 14:15:48,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:48,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 104 [2024-01-30 14:15:48,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:49,905 INFO L124 PetriNetUnfolderBase]: 8298/17193 cut-off events. [2024-01-30 14:15:49,906 INFO L125 PetriNetUnfolderBase]: For 1080/1080 co-relation queries the response was YES. [2024-01-30 14:15:49,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29828 conditions, 17193 events. 8298/17193 cut-off events. For 1080/1080 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 167185 event pairs, 390 based on Foata normal form. 990/15486 useless extension candidates. Maximal degree in co-relation 29812. Up to 10743 conditions per place. [2024-01-30 14:15:49,988 INFO L140 encePairwiseOnDemand]: 97/104 looper letters, 66 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2024-01-30 14:15:49,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 118 transitions, 406 flow [2024-01-30 14:15:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:49,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 309 transitions. [2024-01-30 14:15:49,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7427884615384616 [2024-01-30 14:15:49,990 INFO L175 Difference]: Start difference. First operand has 97 places, 90 transitions, 201 flow. Second operand 4 states and 309 transitions. [2024-01-30 14:15:49,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 118 transitions, 406 flow [2024-01-30 14:15:49,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 118 transitions, 394 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:49,992 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 191 flow [2024-01-30 14:15:49,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=93, PETRI_TRANSITIONS=85} [2024-01-30 14:15:49,993 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -15 predicate places. [2024-01-30 14:15:49,993 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 191 flow [2024-01-30 14:15:49,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 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) [2024-01-30 14:15:49,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:49,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:49,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-30 14:15:49,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 50 more)] === [2024-01-30 14:15:49,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash 363183947, now seen corresponding path program 1 times [2024-01-30 14:15:49,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:49,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8851569] [2024-01-30 14:15:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:49,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-30 14:15:50,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:50,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8851569] [2024-01-30 14:15:50,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8851569] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:50,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:50,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-30 14:15:50,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59318319] [2024-01-30 14:15:50,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:50,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-30 14:15:50,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:50,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-30 14:15:50,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-30 14:15:50,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 104 [2024-01-30 14:15:50,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 85 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:50,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:50,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 104 [2024-01-30 14:15:50,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:51,182 INFO L124 PetriNetUnfolderBase]: 9019/16535 cut-off events. [2024-01-30 14:15:51,183 INFO L125 PetriNetUnfolderBase]: For 1923/1923 co-relation queries the response was YES. [2024-01-30 14:15:51,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29813 conditions, 16535 events. 9019/16535 cut-off events. For 1923/1923 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 146180 event pairs, 5440 based on Foata normal form. 891/14391 useless extension candidates. Maximal degree in co-relation 29797. Up to 8329 conditions per place. [2024-01-30 14:15:51,278 INFO L140 encePairwiseOnDemand]: 97/104 looper letters, 56 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2024-01-30 14:15:51,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 102 transitions, 346 flow [2024-01-30 14:15:51,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-30 14:15:51,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-30 14:15:51,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2024-01-30 14:15:51,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7115384615384616 [2024-01-30 14:15:51,280 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 191 flow. Second operand 3 states and 222 transitions. [2024-01-30 14:15:51,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 102 transitions, 346 flow [2024-01-30 14:15:51,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 102 transitions, 343 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:51,285 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 182 flow [2024-01-30 14:15:51,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2024-01-30 14:15:51,286 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -20 predicate places. [2024-01-30 14:15:51,286 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 182 flow [2024-01-30 14:15:51,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:51,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:51,287 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-01-30 14:15:51,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-30 14:15:51,287 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 50 more)] === [2024-01-30 14:15:51,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1037675666, now seen corresponding path program 1 times [2024-01-30 14:15:51,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:51,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342393194] [2024-01-30 14:15:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:51,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-30 14:15:51,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:51,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342393194] [2024-01-30 14:15:51,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342393194] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:51,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:51,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:51,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687031107] [2024-01-30 14:15:51,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:51,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:51,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:51,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:51,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 104 [2024-01-30 14:15:51,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:51,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:51,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 104 [2024-01-30 14:15:51,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:15:52,323 INFO L124 PetriNetUnfolderBase]: 7471/15060 cut-off events. [2024-01-30 14:15:52,324 INFO L125 PetriNetUnfolderBase]: For 1017/1017 co-relation queries the response was YES. [2024-01-30 14:15:52,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26438 conditions, 15060 events. 7471/15060 cut-off events. For 1017/1017 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 141905 event pairs, 418 based on Foata normal form. 810/13789 useless extension candidates. Maximal degree in co-relation 26422. Up to 8937 conditions per place. [2024-01-30 14:15:52,417 INFO L140 encePairwiseOnDemand]: 97/104 looper letters, 72 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2024-01-30 14:15:52,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 115 transitions, 408 flow [2024-01-30 14:15:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:15:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:15:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 315 transitions. [2024-01-30 14:15:52,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7572115384615384 [2024-01-30 14:15:52,421 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 182 flow. Second operand 4 states and 315 transitions. [2024-01-30 14:15:52,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 115 transitions, 408 flow [2024-01-30 14:15:52,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 115 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:15:52,425 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 172 flow [2024-01-30 14:15:52,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2024-01-30 14:15:52,427 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -24 predicate places. [2024-01-30 14:15:52,427 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 172 flow [2024-01-30 14:15:52,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-30 14:15:52,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:52,428 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-30 14:15:52,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-30 14:15:52,428 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 50 more)] === [2024-01-30 14:15:52,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2103145158, now seen corresponding path program 1 times [2024-01-30 14:15:52,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:52,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432517365] [2024-01-30 14:15:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:52,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-30 14:15:52,441 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-30 14:15:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-30 14:15:52,449 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-30 14:15:52,449 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-30 14:15:52,449 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (52 of 53 remaining) [2024-01-30 14:15:52,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (51 of 53 remaining) [2024-01-30 14:15:52,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (50 of 53 remaining) [2024-01-30 14:15:52,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (49 of 53 remaining) [2024-01-30 14:15:52,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (48 of 53 remaining) [2024-01-30 14:15:52,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (47 of 53 remaining) [2024-01-30 14:15:52,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (46 of 53 remaining) [2024-01-30 14:15:52,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (45 of 53 remaining) [2024-01-30 14:15:52,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (44 of 53 remaining) [2024-01-30 14:15:52,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (43 of 53 remaining) [2024-01-30 14:15:52,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (42 of 53 remaining) [2024-01-30 14:15:52,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (41 of 53 remaining) [2024-01-30 14:15:52,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 53 remaining) [2024-01-30 14:15:52,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 53 remaining) [2024-01-30 14:15:52,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 53 remaining) [2024-01-30 14:15:52,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 53 remaining) [2024-01-30 14:15:52,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 53 remaining) [2024-01-30 14:15:52,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 53 remaining) [2024-01-30 14:15:52,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 53 remaining) [2024-01-30 14:15:52,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 53 remaining) [2024-01-30 14:15:52,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 53 remaining) [2024-01-30 14:15:52,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 53 remaining) [2024-01-30 14:15:52,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 53 remaining) [2024-01-30 14:15:52,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 53 remaining) [2024-01-30 14:15:52,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (28 of 53 remaining) [2024-01-30 14:15:52,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 53 remaining) [2024-01-30 14:15:52,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 53 remaining) [2024-01-30 14:15:52,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 53 remaining) [2024-01-30 14:15:52,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 53 remaining) [2024-01-30 14:15:52,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 53 remaining) [2024-01-30 14:15:52,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 53 remaining) [2024-01-30 14:15:52,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 53 remaining) [2024-01-30 14:15:52,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 53 remaining) [2024-01-30 14:15:52,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 53 remaining) [2024-01-30 14:15:52,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 53 remaining) [2024-01-30 14:15:52,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 53 remaining) [2024-01-30 14:15:52,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 53 remaining) [2024-01-30 14:15:52,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (15 of 53 remaining) [2024-01-30 14:15:52,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 53 remaining) [2024-01-30 14:15:52,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 53 remaining) [2024-01-30 14:15:52,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 53 remaining) [2024-01-30 14:15:52,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 53 remaining) [2024-01-30 14:15:52,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 53 remaining) [2024-01-30 14:15:52,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 53 remaining) [2024-01-30 14:15:52,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 53 remaining) [2024-01-30 14:15:52,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 53 remaining) [2024-01-30 14:15:52,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 53 remaining) [2024-01-30 14:15:52,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 53 remaining) [2024-01-30 14:15:52,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 53 remaining) [2024-01-30 14:15:52,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 53 remaining) [2024-01-30 14:15:52,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONERROR_FUNCTION (2 of 53 remaining) [2024-01-30 14:15:52,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 53 remaining) [2024-01-30 14:15:52,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 53 remaining) [2024-01-30 14:15:52,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-30 14:15:52,458 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-01-30 14:15:52,458 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-30 14:15:52,458 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-30 14:15:52,505 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-30 14:15:52,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 137 transitions, 302 flow [2024-01-30 14:15:52,537 INFO L124 PetriNetUnfolderBase]: 4/148 cut-off events. [2024-01-30 14:15:52,537 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-30 14:15:52,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 148 events. 4/148 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 629 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 131. Up to 5 conditions per place. [2024-01-30 14:15:52,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 137 transitions, 302 flow [2024-01-30 14:15:52,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 137 transitions, 302 flow [2024-01-30 14:15:52,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-30 14:15:52,541 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;@62e65051, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-30 14:15:52,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 66 error locations. [2024-01-30 14:15:52,543 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-30 14:15:52,543 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-01-30 14:15:52,543 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-30 14:15:52,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:15:52,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-30 14:15:52,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 63 more)] === [2024-01-30 14:15:52,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:15:52,544 INFO L85 PathProgramCache]: Analyzing trace with hash 538449370, now seen corresponding path program 1 times [2024-01-30 14:15:52,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:15:52,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907525517] [2024-01-30 14:15:52,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:15:52,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:15:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:15:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:15:52,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:15:52,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907525517] [2024-01-30 14:15:52,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907525517] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:15:52,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:15:52,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:15:52,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669117134] [2024-01-30 14:15:52,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:15:52,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:15:52,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:15:52,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:15:52,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:15:52,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 137 [2024-01-30 14:15:52,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 137 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 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) [2024-01-30 14:15:52,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:15:52,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 137 [2024-01-30 14:15:52,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:09,620 INFO L124 PetriNetUnfolderBase]: 119631/209713 cut-off events. [2024-01-30 14:16:09,620 INFO L125 PetriNetUnfolderBase]: For 14651/14651 co-relation queries the response was YES. [2024-01-30 14:16:10,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368114 conditions, 209713 events. 119631/209713 cut-off events. For 14651/14651 co-relation queries the response was YES. Maximal size of possible extension queue 6858. Compared 2336933 event pairs, 7668 based on Foata normal form. 9999/181090 useless extension candidates. Maximal degree in co-relation 30129. Up to 140997 conditions per place. [2024-01-30 14:16:11,547 INFO L140 encePairwiseOnDemand]: 125/137 looper letters, 81 selfloop transitions, 2 changer transitions 0/163 dead transitions. [2024-01-30 14:16:11,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 163 transitions, 541 flow [2024-01-30 14:16:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-30 14:16:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-30 14:16:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 418 transitions. [2024-01-30 14:16:11,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7627737226277372 [2024-01-30 14:16:11,549 INFO L175 Difference]: Start difference. First operand has 142 places, 137 transitions, 302 flow. Second operand 4 states and 418 transitions. [2024-01-30 14:16:11,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 163 transitions, 541 flow [2024-01-30 14:16:11,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 529 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-01-30 14:16:11,556 INFO L231 Difference]: Finished difference. Result has 135 places, 127 transitions, 280 flow [2024-01-30 14:16:11,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=280, PETRI_PLACES=135, PETRI_TRANSITIONS=127} [2024-01-30 14:16:11,557 INFO L281 CegarLoopForPetriNet]: 142 programPoint places, -7 predicate places. [2024-01-30 14:16:11,557 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 127 transitions, 280 flow [2024-01-30 14:16:11,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 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) [2024-01-30 14:16:11,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:11,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-30 14:16:11,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-30 14:16:11,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 63 more)] === [2024-01-30 14:16:11,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:11,558 INFO L85 PathProgramCache]: Analyzing trace with hash -487938076, now seen corresponding path program 1 times [2024-01-30 14:16:11,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:11,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407069115] [2024-01-30 14:16:11,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:11,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-30 14:16:11,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:11,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407069115] [2024-01-30 14:16:11,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407069115] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:11,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:11,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-30 14:16:11,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79165999] [2024-01-30 14:16:11,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:11,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-30 14:16:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-30 14:16:11,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-30 14:16:11,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 137 [2024-01-30 14:16:11,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 127 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2024-01-30 14:16:11,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:11,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 137 [2024-01-30 14:16:11,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-30 14:16:29,099 INFO L124 PetriNetUnfolderBase]: 140224/224697 cut-off events. [2024-01-30 14:16:29,100 INFO L125 PetriNetUnfolderBase]: For 32489/32489 co-relation queries the response was YES. [2024-01-30 14:16:29,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412258 conditions, 224697 events. 140224/224697 cut-off events. For 32489/32489 co-relation queries the response was YES. Maximal size of possible extension queue 6834. Compared 2282334 event pairs, 84668 based on Foata normal form. 9999/189122 useless extension candidates. Maximal degree in co-relation 374562. Up to 119039 conditions per place. [2024-01-30 14:16:30,816 INFO L140 encePairwiseOnDemand]: 130/137 looper letters, 81 selfloop transitions, 2 changer transitions 0/157 dead transitions. [2024-01-30 14:16:30,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 157 transitions, 521 flow [2024-01-30 14:16:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-30 14:16:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-30 14:16:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2024-01-30 14:16:30,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.754257907542579 [2024-01-30 14:16:30,819 INFO L175 Difference]: Start difference. First operand has 135 places, 127 transitions, 280 flow. Second operand 3 states and 310 transitions. [2024-01-30 14:16:30,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 157 transitions, 521 flow [2024-01-30 14:16:30,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 157 transitions, 518 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-30 14:16:30,870 INFO L231 Difference]: Finished difference. Result has 130 places, 122 transitions, 271 flow [2024-01-30 14:16:30,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=130, PETRI_TRANSITIONS=122} [2024-01-30 14:16:30,871 INFO L281 CegarLoopForPetriNet]: 142 programPoint places, -12 predicate places. [2024-01-30 14:16:30,871 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 122 transitions, 271 flow [2024-01-30 14:16:30,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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) [2024-01-30 14:16:30,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-30 14:16:30,872 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-30 14:16:30,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-30 14:16:30,872 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 63 more)] === [2024-01-30 14:16:30,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-30 14:16:30,872 INFO L85 PathProgramCache]: Analyzing trace with hash -846764950, now seen corresponding path program 1 times [2024-01-30 14:16:30,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-30 14:16:30,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050585603] [2024-01-30 14:16:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-30 14:16:30,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-30 14:16:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-30 14:16:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-30 14:16:30,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-30 14:16:30,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050585603] [2024-01-30 14:16:30,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050585603] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-30 14:16:30,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-30 14:16:30,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-30 14:16:30,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540137169] [2024-01-30 14:16:30,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-30 14:16:30,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-30 14:16:30,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-30 14:16:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-30 14:16:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-30 14:16:30,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 137 [2024-01-30 14:16:30,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 122 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 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) [2024-01-30 14:16:30,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-30 14:16:30,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 137 [2024-01-30 14:16:30,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand