./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym-pthread.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/09_fmaxsym-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 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/09_fmaxsym-pthread.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/09_fmaxsym-pthread.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 16:42:17,196 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:42:17,259 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:42:17,263 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:42:17,264 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:42:17,288 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:42:17,289 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:42:17,289 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:42:17,290 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:42:17,292 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:42:17,293 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:42:17,293 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:42:17,294 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:42:17,294 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:42:17,295 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:42:17,295 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:42:17,295 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:42:17,295 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:42:17,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:42:17,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:42:17,295 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:42:17,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:42:17,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:42:17,296 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:42:17,296 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:42:17,296 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:42:17,296 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:42:17,297 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:42:17,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:42:17,297 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:42:17,298 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:42:17,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:42:17,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:42:17,298 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:42:17,298 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:42:17,298 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:42:17,298 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:42:17,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:42:17,299 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:42:17,299 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:42:17,299 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:42:17,299 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:42:17,299 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:42:17,299 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:42:17,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:42:17,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:42:17,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:42:17,558 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:42:17,558 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:42:17,559 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym-pthread.i [2024-01-31 16:42:18,531 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:42:18,730 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:42:18,731 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym-pthread.i [2024-01-31 16:42:18,744 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd5c0d76b/aeb3afe5be674983904854ed3e1da5ef/FLAG61737e2c8 [2024-01-31 16:42:18,755 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd5c0d76b/aeb3afe5be674983904854ed3e1da5ef [2024-01-31 16:42:18,759 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:42:18,759 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:42:18,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/09_fmaxsym-pthread.yml/witness.yml [2024-01-31 16:42:18,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:42:18,872 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:42:18,873 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:42:18,874 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:42:18,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:42:18,878 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:42:18" (1/2) ... [2024-01-31 16:42:18,879 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@100e35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:42:18, skipping insertion in model container [2024-01-31 16:42:18,879 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:42:18" (1/2) ... [2024-01-31 16:42:18,881 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6702b47e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:42:18, skipping insertion in model container [2024-01-31 16:42:18,881 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:42:18" (2/2) ... [2024-01-31 16:42:18,881 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@100e35e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:18, skipping insertion in model container [2024-01-31 16:42:18,881 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:42:18" (2/2) ... [2024-01-31 16:42:18,882 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:42:18,949 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:42:18,951 INFO L98 nessWitnessExtractor]: Location invariant after [L712-L712] (unsigned long )arg == 0UL [2024-01-31 16:42:18,951 INFO L98 nessWitnessExtractor]: Location invariant before [L707-L707] (((((offset <= 2147483645) && (i <= 2147483646)) && ((int )max <= -1)) && (e == 0)) && ((int )max != 0)) && (((-2147483647 <= i && (1LL - (long long )i) + (long long )offset >= 0LL) && (-1LL + (long long )i) - (long long )offset >= 0LL) || (((0LL - (long long )i) + (long long )offset >= 0LL && (long long )i - (long long )offset >= 0LL) && offset == i)) [2024-01-31 16:42:18,995 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:42:19,248 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/09_fmaxsym-pthread.i[30754,30767] [2024-01-31 16:42:19,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:42:19,281 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:42:19,330 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/09_fmaxsym-pthread.i[30754,30767] Start Parsing Local [2024-01-31 16:42:19,361 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:42:19,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:42:19,393 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:42:19,394 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19 WrapperNode [2024-01-31 16:42:19,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:42:19,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:42:19,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:42:19,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:42:19,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (1/1) ... [2024-01-31 16:42:19,428 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (1/1) ... [2024-01-31 16:42:19,454 INFO L138 Inliner]: procedures = 165, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 94 [2024-01-31 16:42:19,454 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:42:19,455 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:42:19,456 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:42:19,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:42:19,464 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (1/1) ... [2024-01-31 16:42:19,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (1/1) ... [2024-01-31 16:42:19,469 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (1/1) ... [2024-01-31 16:42:19,480 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 1, 5, 8]. 50 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 0, 5, 6]. The 2 writes are split as follows [0, 1, 0, 1]. [2024-01-31 16:42:19,480 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (1/1) ... [2024-01-31 16:42:19,481 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (1/1) ... [2024-01-31 16:42:19,484 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (1/1) ... [2024-01-31 16:42:19,487 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (1/1) ... [2024-01-31 16:42:19,488 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (1/1) ... [2024-01-31 16:42:19,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (1/1) ... [2024-01-31 16:42:19,490 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:42:19,491 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:42:19,491 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:42:19,491 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:42:19,491 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (1/1) ... [2024-01-31 16:42:19,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:42:19,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:19,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:42:19,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:42:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:42:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:42:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:42:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:42:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-31 16:42:19,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-31 16:42:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:42:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:42:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:42:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:42:19,596 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:42:19,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:42:19,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:42:19,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:42:19,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:42:19,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:42:19,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:42:19,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:42:19,597 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:42:19,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:42:19,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:42:19,598 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:42:19,713 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:42:19,716 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:42:19,856 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:42:19,856 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:42:19,946 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:42:19,947 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 16:42:19,947 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:42:19 BoogieIcfgContainer [2024-01-31 16:42:19,947 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:42:19,949 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:42:19,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:42:19,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:42:19,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:42:18" (1/4) ... [2024-01-31 16:42:19,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db2692a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:42:19, skipping insertion in model container [2024-01-31 16:42:19,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:42:18" (2/4) ... [2024-01-31 16:42:19,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db2692a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:42:19, skipping insertion in model container [2024-01-31 16:42:19,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:19" (3/4) ... [2024-01-31 16:42:19,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db2692a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:42:19, skipping insertion in model container [2024-01-31 16:42:19,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:42:19" (4/4) ... [2024-01-31 16:42:19,954 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym-pthread.i [2024-01-31 16:42:19,967 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:42:19,967 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-31 16:42:19,967 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:42:19,999 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:42:20,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 25 transitions, 54 flow [2024-01-31 16:42:20,053 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2024-01-31 16:42:20,053 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:42:20,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 27 events. 3/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-01-31 16:42:20,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 25 transitions, 54 flow [2024-01-31 16:42:20,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 25 transitions, 54 flow [2024-01-31 16:42:20,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:42:20,087 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;@4aecdd2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:42:20,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-31 16:42:20,100 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:42:20,100 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2024-01-31 16:42:20,100 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:42:20,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:20,101 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-01-31 16:42:20,102 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 16:42:20,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:20,108 INFO L85 PathProgramCache]: Analyzing trace with hash -870379494, now seen corresponding path program 1 times [2024-01-31 16:42:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:20,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419703910] [2024-01-31 16:42:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:20,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:20,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:20,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419703910] [2024-01-31 16:42:20,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419703910] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:20,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:42:20,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:42:20,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886087832] [2024-01-31 16:42:20,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:20,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:20,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:20,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:42:20,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 25 [2024-01-31 16:42:20,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:20,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:20,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 25 [2024-01-31 16:42:20,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:20,378 INFO L124 PetriNetUnfolderBase]: 20/74 cut-off events. [2024-01-31 16:42:20,378 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:42:20,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 74 events. 20/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 177 event pairs, 16 based on Foata normal form. 3/67 useless extension candidates. Maximal degree in co-relation 111. Up to 51 conditions per place. [2024-01-31 16:42:20,380 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 14 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-01-31 16:42:20,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 24 transitions, 84 flow [2024-01-31 16:42:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-01-31 16:42:20,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-01-31 16:42:20,390 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 54 flow. Second operand 3 states and 43 transitions. [2024-01-31 16:42:20,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 24 transitions, 84 flow [2024-01-31 16:42:20,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 84 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:42:20,394 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2024-01-31 16:42:20,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-01-31 16:42:20,400 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2024-01-31 16:42:20,400 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2024-01-31 16:42:20,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:20,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:20,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:20,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:42:20,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 16:42:20,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1622253757, now seen corresponding path program 1 times [2024-01-31 16:42:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:20,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676969809] [2024-01-31 16:42:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:20,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:20,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:20,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676969809] [2024-01-31 16:42:20,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676969809] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:20,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640958019] [2024-01-31 16:42:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:20,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:20,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:20,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:20,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:42:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:20,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 16:42:20,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:20,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:20,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640958019] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:20,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:20,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-01-31 16:42:20,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243923604] [2024-01-31 16:42:20,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:20,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:42:20,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:20,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:42:20,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:42:20,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 25 [2024-01-31 16:42:20,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:20,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:20,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 25 [2024-01-31 16:42:20,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:20,732 INFO L124 PetriNetUnfolderBase]: 20/77 cut-off events. [2024-01-31 16:42:20,732 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:42:20,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 77 events. 20/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 177 event pairs, 16 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 134. Up to 51 conditions per place. [2024-01-31 16:42:20,736 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 14 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2024-01-31 16:42:20,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 112 flow [2024-01-31 16:42:20,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:42:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:42:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-01-31 16:42:20,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-01-31 16:42:20,739 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 6 states and 70 transitions. [2024-01-31 16:42:20,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 112 flow [2024-01-31 16:42:20,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 108 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:20,742 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 94 flow [2024-01-31 16:42:20,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-01-31 16:42:20,743 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2024-01-31 16:42:20,743 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 94 flow [2024-01-31 16:42:20,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:20,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:20,744 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-01-31 16:42:20,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 16:42:20,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:20,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 16:42:20,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:20,956 INFO L85 PathProgramCache]: Analyzing trace with hash -988933542, now seen corresponding path program 2 times [2024-01-31 16:42:20,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:20,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318646385] [2024-01-31 16:42:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:20,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:21,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:21,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318646385] [2024-01-31 16:42:21,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318646385] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:21,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774431152] [2024-01-31 16:42:21,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:42:21,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:21,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:21,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:21,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:42:21,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:42:21,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:42:21,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:42:21,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:21,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:21,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774431152] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:21,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:21,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2024-01-31 16:42:21,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282446050] [2024-01-31 16:42:21,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:21,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:42:21,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:42:21,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:42:21,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 25 [2024-01-31 16:42:21,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 94 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:21,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:21,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 25 [2024-01-31 16:42:21,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:21,306 INFO L124 PetriNetUnfolderBase]: 20/79 cut-off events. [2024-01-31 16:42:21,306 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-01-31 16:42:21,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 79 events. 20/79 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 177 event pairs, 16 based on Foata normal form. 2/72 useless extension candidates. Maximal degree in co-relation 125. Up to 51 conditions per place. [2024-01-31 16:42:21,308 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 14 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2024-01-31 16:42:21,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 148 flow [2024-01-31 16:42:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:42:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:42:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-01-31 16:42:21,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435 [2024-01-31 16:42:21,313 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 94 flow. Second operand 8 states and 87 transitions. [2024-01-31 16:42:21,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 148 flow [2024-01-31 16:42:21,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 134 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:21,316 INFO L231 Difference]: Finished difference. Result has 42 places, 29 transitions, 116 flow [2024-01-31 16:42:21,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=116, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2024-01-31 16:42:21,317 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2024-01-31 16:42:21,317 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 116 flow [2024-01-31 16:42:21,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:21,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:21,318 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-01-31 16:42:21,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:21,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-01-31 16:42:21,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 16:42:21,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:21,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1421842566, now seen corresponding path program 3 times [2024-01-31 16:42:21,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:21,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081604557] [2024-01-31 16:42:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:21,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:42:21,560 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:42:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:42:21,606 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:42:21,607 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:42:21,608 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-31 16:42:21,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-01-31 16:42:21,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-01-31 16:42:21,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 5 remaining) [2024-01-31 16:42:21,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-31 16:42:21,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:42:21,610 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-01-31 16:42:21,612 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:42:21,612 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-31 16:42:21,634 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:42:21,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 43 transitions, 96 flow [2024-01-31 16:42:21,649 INFO L124 PetriNetUnfolderBase]: 5/48 cut-off events. [2024-01-31 16:42:21,649 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:42:21,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 48 events. 5/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 37. Up to 3 conditions per place. [2024-01-31 16:42:21,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 43 transitions, 96 flow [2024-01-31 16:42:21,651 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 43 transitions, 96 flow [2024-01-31 16:42:21,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:42:21,656 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;@4aecdd2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:42:21,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-01-31 16:42:21,662 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:42:21,663 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2024-01-31 16:42:21,663 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:42:21,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:21,663 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-01-31 16:42:21,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-31 16:42:21,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:21,664 INFO L85 PathProgramCache]: Analyzing trace with hash -414263844, now seen corresponding path program 1 times [2024-01-31 16:42:21,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:21,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214875415] [2024-01-31 16:42:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:21,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 16:42:21,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:21,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214875415] [2024-01-31 16:42:21,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214875415] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:21,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:42:21,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:42:21,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918018694] [2024-01-31 16:42:21,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:21,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:21,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:21,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:21,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:42:21,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-01-31 16:42:21,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:21,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:21,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-01-31 16:42:21,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:21,874 INFO L124 PetriNetUnfolderBase]: 434/1006 cut-off events. [2024-01-31 16:42:21,874 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-01-31 16:42:21,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747 conditions, 1006 events. 434/1006 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5705 event pairs, 376 based on Foata normal form. 48/903 useless extension candidates. Maximal degree in co-relation 1074. Up to 708 conditions per place. [2024-01-31 16:42:21,881 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 24 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-01-31 16:42:21,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 144 flow [2024-01-31 16:42:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-01-31 16:42:21,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-01-31 16:42:21,884 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 96 flow. Second operand 3 states and 75 transitions. [2024-01-31 16:42:21,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 144 flow [2024-01-31 16:42:21,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:42:21,885 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 102 flow [2024-01-31 16:42:21,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2024-01-31 16:42:21,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-01-31 16:42:21,887 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 102 flow [2024-01-31 16:42:21,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:21,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:21,887 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:21,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:42:21,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-31 16:42:21,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1205481346, now seen corresponding path program 1 times [2024-01-31 16:42:21,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:21,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911459346] [2024-01-31 16:42:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:21,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 16:42:21,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:21,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911459346] [2024-01-31 16:42:21,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911459346] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:21,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006321304] [2024-01-31 16:42:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:21,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:21,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:21,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:21,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:42:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:22,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 16:42:22,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 16:42:22,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 16:42:22,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006321304] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:22,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:22,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-01-31 16:42:22,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567607900] [2024-01-31 16:42:22,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:22,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:42:22,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:22,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:42:22,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:42:22,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-01-31 16:42:22,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 102 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:22,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:22,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-01-31 16:42:22,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:22,129 INFO L124 PetriNetUnfolderBase]: 434/1009 cut-off events. [2024-01-31 16:42:22,129 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-01-31 16:42:22,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1763 conditions, 1009 events. 434/1009 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5717 event pairs, 376 based on Foata normal form. 0/858 useless extension candidates. Maximal degree in co-relation 1750. Up to 708 conditions per place. [2024-01-31 16:42:22,134 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 24 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-01-31 16:42:22,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 172 flow [2024-01-31 16:42:22,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:42:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:42:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-01-31 16:42:22,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-01-31 16:42:22,135 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 102 flow. Second operand 6 states and 122 transitions. [2024-01-31 16:42:22,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 172 flow [2024-01-31 16:42:22,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 44 transitions, 168 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:22,136 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 134 flow [2024-01-31 16:42:22,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-01-31 16:42:22,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-01-31 16:42:22,137 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 134 flow [2024-01-31 16:42:22,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:22,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:22,137 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-01-31 16:42:22,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:22,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:22,345 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-31 16:42:22,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:22,345 INFO L85 PathProgramCache]: Analyzing trace with hash -494309796, now seen corresponding path program 2 times [2024-01-31 16:42:22,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:22,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922147735] [2024-01-31 16:42:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:22,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 16:42:22,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:22,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922147735] [2024-01-31 16:42:22,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922147735] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:22,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876428509] [2024-01-31 16:42:22,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:42:22,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:22,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:22,398 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:22,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:42:22,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:42:22,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:42:22,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:42:22,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 16:42:22,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 16:42:22,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876428509] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:22,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:22,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2024-01-31 16:42:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107379377] [2024-01-31 16:42:22,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:22,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:42:22,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:22,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:42:22,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:42:22,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-01-31 16:42:22,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:22,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:22,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-01-31 16:42:22,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:22,650 INFO L124 PetriNetUnfolderBase]: 434/1011 cut-off events. [2024-01-31 16:42:22,650 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-01-31 16:42:22,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784 conditions, 1011 events. 434/1011 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5720 event pairs, 376 based on Foata normal form. 2/863 useless extension candidates. Maximal degree in co-relation 1741. Up to 708 conditions per place. [2024-01-31 16:42:22,655 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 24 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2024-01-31 16:42:22,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 46 transitions, 208 flow [2024-01-31 16:42:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:42:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:42:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-01-31 16:42:22,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-01-31 16:42:22,657 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 134 flow. Second operand 8 states and 153 transitions. [2024-01-31 16:42:22,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 46 transitions, 208 flow [2024-01-31 16:42:22,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 46 transitions, 194 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:22,660 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 156 flow [2024-01-31 16:42:22,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=156, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-01-31 16:42:22,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-01-31 16:42:22,662 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 156 flow [2024-01-31 16:42:22,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:22,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:22,662 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-01-31 16:42:22,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:22,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:22,874 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-31 16:42:22,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:22,875 INFO L85 PathProgramCache]: Analyzing trace with hash 421831324, now seen corresponding path program 3 times [2024-01-31 16:42:22,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:22,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016592220] [2024-01-31 16:42:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:22,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:42:22,889 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:42:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:42:22,902 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:42:22,902 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:42:22,902 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-01-31 16:42:22,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 7 remaining) [2024-01-31 16:42:22,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-01-31 16:42:22,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 7 remaining) [2024-01-31 16:42:22,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-01-31 16:42:22,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 7 remaining) [2024-01-31 16:42:22,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-01-31 16:42:22,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:42:22,903 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-01-31 16:42:22,904 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:42:22,904 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-31 16:42:22,927 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:42:22,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 61 transitions, 140 flow [2024-01-31 16:42:22,932 INFO L124 PetriNetUnfolderBase]: 7/69 cut-off events. [2024-01-31 16:42:22,933 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:42:22,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 69 events. 7/69 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 163 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2024-01-31 16:42:22,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 61 transitions, 140 flow [2024-01-31 16:42:22,934 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 61 transitions, 140 flow [2024-01-31 16:42:22,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:42:22,935 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;@4aecdd2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:42:22,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-01-31 16:42:22,938 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:42:22,938 INFO L124 PetriNetUnfolderBase]: 1/37 cut-off events. [2024-01-31 16:42:22,938 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:42:22,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:22,938 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:22,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:42:22,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:22,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1051806015, now seen corresponding path program 1 times [2024-01-31 16:42:22,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:22,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627451899] [2024-01-31 16:42:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:22,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:42:22,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:22,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627451899] [2024-01-31 16:42:22,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627451899] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:22,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:42:22,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:42:22,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200351174] [2024-01-31 16:42:22,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:22,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:22,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:22,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:22,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:42:22,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 61 [2024-01-31 16:42:22,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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) [2024-01-31 16:42:22,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:22,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 61 [2024-01-31 16:42:22,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:23,796 INFO L124 PetriNetUnfolderBase]: 6347/11595 cut-off events. [2024-01-31 16:42:23,798 INFO L125 PetriNetUnfolderBase]: For 607/607 co-relation queries the response was YES. [2024-01-31 16:42:23,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20761 conditions, 11595 events. 6347/11595 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 88164 event pairs, 5560 based on Foata normal form. 664/10579 useless extension candidates. Maximal degree in co-relation 1747. Up to 8808 conditions per place. [2024-01-31 16:42:23,854 INFO L140 encePairwiseOnDemand]: 54/61 looper letters, 34 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-01-31 16:42:23,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 206 flow [2024-01-31 16:42:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-01-31 16:42:23,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846994535519126 [2024-01-31 16:42:23,855 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 140 flow. Second operand 3 states and 107 transitions. [2024-01-31 16:42:23,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 206 flow [2024-01-31 16:42:23,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 204 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-01-31 16:42:23,859 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 142 flow [2024-01-31 16:42:23,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-01-31 16:42:23,860 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2024-01-31 16:42:23,860 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 142 flow [2024-01-31 16:42:23,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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) [2024-01-31 16:42:23,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:23,861 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:23,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:42:23,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:42:23,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:23,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2088774594, now seen corresponding path program 1 times [2024-01-31 16:42:23,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:23,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149840175] [2024-01-31 16:42:23,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:23,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:42:23,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:23,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149840175] [2024-01-31 16:42:23,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149840175] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:23,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583401235] [2024-01-31 16:42:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:23,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:23,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:23,913 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:23,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:42:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:23,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 16:42:24,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:42:24,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:42:24,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583401235] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:24,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:24,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-01-31 16:42:24,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942733625] [2024-01-31 16:42:24,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:24,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:42:24,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:24,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:42:24,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:42:24,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 61 [2024-01-31 16:42:24,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:24,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:24,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 61 [2024-01-31 16:42:24,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:24,822 INFO L124 PetriNetUnfolderBase]: 6347/11598 cut-off events. [2024-01-31 16:42:24,823 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-01-31 16:42:24,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20696 conditions, 11598 events. 6347/11598 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 88185 event pairs, 5560 based on Foata normal form. 0/9918 useless extension candidates. Maximal degree in co-relation 20682. Up to 8808 conditions per place. [2024-01-31 16:42:24,877 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 34 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-01-31 16:42:24,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 232 flow [2024-01-31 16:42:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:42:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:42:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-01-31 16:42:24,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47540983606557374 [2024-01-31 16:42:24,879 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 142 flow. Second operand 6 states and 174 transitions. [2024-01-31 16:42:24,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 232 flow [2024-01-31 16:42:24,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 61 transitions, 228 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:24,881 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 174 flow [2024-01-31 16:42:24,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2024-01-31 16:42:24,883 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2024-01-31 16:42:24,883 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 174 flow [2024-01-31 16:42:24,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:24,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:24,884 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:24,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:25,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-31 16:42:25,098 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:42:25,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:25,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1132171519, now seen corresponding path program 2 times [2024-01-31 16:42:25,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:25,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007215663] [2024-01-31 16:42:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:25,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:42:25,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:25,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007215663] [2024-01-31 16:42:25,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007215663] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:25,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715274990] [2024-01-31 16:42:25,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:42:25,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:25,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:25,149 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:25,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:42:25,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:42:25,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:42:25,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:42:25,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:42:25,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:42:25,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715274990] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:25,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:25,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2024-01-31 16:42:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320850096] [2024-01-31 16:42:25,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:25,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:42:25,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:25,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:42:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:42:25,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 61 [2024-01-31 16:42:25,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 174 flow. Second operand has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:25,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:25,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 61 [2024-01-31 16:42:25,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:26,174 INFO L124 PetriNetUnfolderBase]: 6347/11600 cut-off events. [2024-01-31 16:42:26,175 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-01-31 16:42:26,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20717 conditions, 11600 events. 6347/11600 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 88224 event pairs, 5560 based on Foata normal form. 2/9923 useless extension candidates. Maximal degree in co-relation 20673. Up to 8808 conditions per place. [2024-01-31 16:42:26,218 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 34 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-01-31 16:42:26,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 63 transitions, 268 flow [2024-01-31 16:42:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:42:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:42:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-01-31 16:42:26,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4487704918032787 [2024-01-31 16:42:26,220 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 174 flow. Second operand 8 states and 219 transitions. [2024-01-31 16:42:26,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 63 transitions, 268 flow [2024-01-31 16:42:26,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 63 transitions, 254 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:26,222 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 196 flow [2024-01-31 16:42:26,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=196, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-01-31 16:42:26,222 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 17 predicate places. [2024-01-31 16:42:26,222 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 196 flow [2024-01-31 16:42:26,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:26,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:26,223 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:26,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:26,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:26,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:42:26,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:26,429 INFO L85 PathProgramCache]: Analyzing trace with hash 740687649, now seen corresponding path program 3 times [2024-01-31 16:42:26,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:26,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973253059] [2024-01-31 16:42:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:26,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:42:26,445 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:42:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:42:26,466 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:42:26,467 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:42:26,467 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2024-01-31 16:42:26,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 9 remaining) [2024-01-31 16:42:26,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2024-01-31 16:42:26,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 9 remaining) [2024-01-31 16:42:26,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2024-01-31 16:42:26,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 9 remaining) [2024-01-31 16:42:26,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2024-01-31 16:42:26,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 9 remaining) [2024-01-31 16:42:26,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2024-01-31 16:42:26,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:42:26,468 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-01-31 16:42:26,469 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:42:26,469 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-31 16:42:26,499 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:42:26,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 79 transitions, 186 flow [2024-01-31 16:42:26,519 INFO L124 PetriNetUnfolderBase]: 9/90 cut-off events. [2024-01-31 16:42:26,519 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-31 16:42:26,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 90 events. 9/90 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 245 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 79. Up to 5 conditions per place. [2024-01-31 16:42:26,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 79 transitions, 186 flow [2024-01-31 16:42:26,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 79 transitions, 186 flow [2024-01-31 16:42:26,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:42:26,521 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;@4aecdd2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:42:26,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-01-31 16:42:26,526 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:42:26,526 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-01-31 16:42:26,526 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-01-31 16:42:26,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:26,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:26,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:42:26,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash 97299206, now seen corresponding path program 1 times [2024-01-31 16:42:26,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:26,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710291000] [2024-01-31 16:42:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:26,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:26,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:26,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710291000] [2024-01-31 16:42:26,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710291000] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:26,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:42:26,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:42:26,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397423300] [2024-01-31 16:42:26,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:26,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:26,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:26,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:26,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:42:26,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 79 [2024-01-31 16:42:26,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:26,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:26,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 79 [2024-01-31 16:42:26,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:34,088 INFO L124 PetriNetUnfolderBase]: 79247/126579 cut-off events. [2024-01-31 16:42:34,088 INFO L125 PetriNetUnfolderBase]: For 9587/9587 co-relation queries the response was YES. [2024-01-31 16:42:34,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231974 conditions, 126579 events. 79247/126579 cut-off events. For 9587/9587 co-relation queries the response was YES. Maximal size of possible extension queue 4261. Compared 1121994 event pairs, 69712 based on Foata normal form. 8395/117346 useless extension candidates. Maximal degree in co-relation 20841. Up to 101391 conditions per place. [2024-01-31 16:42:34,795 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 44 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-01-31 16:42:34,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 270 flow [2024-01-31 16:42:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2024-01-31 16:42:34,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864978902953587 [2024-01-31 16:42:34,805 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 186 flow. Second operand 3 states and 139 transitions. [2024-01-31 16:42:34,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 270 flow [2024-01-31 16:42:34,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 75 transitions, 264 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-01-31 16:42:34,815 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 182 flow [2024-01-31 16:42:34,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-01-31 16:42:34,816 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 2 predicate places. [2024-01-31 16:42:34,816 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 182 flow [2024-01-31 16:42:34,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:34,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:34,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:34,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:42:34,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:42:34,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1803526196, now seen corresponding path program 1 times [2024-01-31 16:42:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:34,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195778292] [2024-01-31 16:42:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:34,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:34,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:34,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195778292] [2024-01-31 16:42:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195778292] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:34,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546652898] [2024-01-31 16:42:34,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:34,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:34,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:34,853 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:34,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:42:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:34,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 16:42:34,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:34,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:34,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546652898] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:34,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:34,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-01-31 16:42:34,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137743716] [2024-01-31 16:42:34,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:34,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:42:34,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:34,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:42:34,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:42:34,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 79 [2024-01-31 16:42:34,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:34,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:34,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 79 [2024-01-31 16:42:34,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:42,864 INFO L124 PetriNetUnfolderBase]: 79247/126582 cut-off events. [2024-01-31 16:42:42,864 INFO L125 PetriNetUnfolderBase]: For 4317/4317 co-relation queries the response was YES. [2024-01-31 16:42:43,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230451 conditions, 126582 events. 79247/126582 cut-off events. For 4317/4317 co-relation queries the response was YES. Maximal size of possible extension queue 4261. Compared 1121860 event pairs, 69712 based on Foata normal form. 0/108954 useless extension candidates. Maximal degree in co-relation 230436. Up to 101391 conditions per place. [2024-01-31 16:42:43,615 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 44 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2024-01-31 16:42:43,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 78 transitions, 292 flow [2024-01-31 16:42:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:42:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:42:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 226 transitions. [2024-01-31 16:42:43,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767932489451477 [2024-01-31 16:42:43,616 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 182 flow. Second operand 6 states and 226 transitions. [2024-01-31 16:42:43,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 78 transitions, 292 flow [2024-01-31 16:42:43,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 78 transitions, 288 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:43,633 INFO L231 Difference]: Finished difference. Result has 88 places, 78 transitions, 214 flow [2024-01-31 16:42:43,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=88, PETRI_TRANSITIONS=78} [2024-01-31 16:42:43,634 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 9 predicate places. [2024-01-31 16:42:43,634 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 78 transitions, 214 flow [2024-01-31 16:42:43,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:43,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:43,634 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:43,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:43,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:43,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:42:43,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:43,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1433896582, now seen corresponding path program 2 times [2024-01-31 16:42:43,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:43,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653438494] [2024-01-31 16:42:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:43,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:43,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:43,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653438494] [2024-01-31 16:42:43,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653438494] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:43,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202254169] [2024-01-31 16:42:43,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:42:43,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:43,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:43,908 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:43,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 16:42:44,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:42:44,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:42:44,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2024-01-31 16:42:44,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:42:44,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:42:44,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202254169] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:44,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:42:44,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-01-31 16:42:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164841389] [2024-01-31 16:42:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:44,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:44,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:42:44,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-01-31 16:42:44,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 78 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:44,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:44,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-01-31 16:42:44,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:52,795 INFO L124 PetriNetUnfolderBase]: 99317/145239 cut-off events. [2024-01-31 16:42:52,795 INFO L125 PetriNetUnfolderBase]: For 4033/4033 co-relation queries the response was YES. [2024-01-31 16:42:53,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274657 conditions, 145239 events. 99317/145239 cut-off events. For 4033/4033 co-relation queries the response was YES. Maximal size of possible extension queue 4194. Compared 1135571 event pairs, 37636 based on Foata normal form. 0/126781 useless extension candidates. Maximal degree in co-relation 274620. Up to 67590 conditions per place. [2024-01-31 16:42:53,649 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 81 selfloop transitions, 3 changer transitions 0/108 dead transitions. [2024-01-31 16:42:53,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 108 transitions, 457 flow [2024-01-31 16:42:53,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 159 transitions. [2024-01-31 16:42:53,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708860759493671 [2024-01-31 16:42:53,650 INFO L175 Difference]: Start difference. First operand has 88 places, 78 transitions, 214 flow. Second operand 3 states and 159 transitions. [2024-01-31 16:42:53,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 108 transitions, 457 flow [2024-01-31 16:42:53,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 108 transitions, 443 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:53,657 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 209 flow [2024-01-31 16:42:53,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2024-01-31 16:42:53,657 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 7 predicate places. [2024-01-31 16:42:53,658 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 209 flow [2024-01-31 16:42:53,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:53,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:53,658 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:53,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:53,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 16:42:53,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:42:53,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:53,869 INFO L85 PathProgramCache]: Analyzing trace with hash 301025117, now seen corresponding path program 1 times [2024-01-31 16:42:53,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:53,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309790075] [2024-01-31 16:42:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:53,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-01-31 16:42:53,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:53,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309790075] [2024-01-31 16:42:53,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309790075] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:53,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820944958] [2024-01-31 16:42:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:53,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:53,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:53,927 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:42:53,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 16:42:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:54,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:42:54,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-01-31 16:42:54,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-01-31 16:42:54,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820944958] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:54,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:54,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2024-01-31 16:42:54,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796001279] [2024-01-31 16:42:54,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:54,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:42:54,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:42:54,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:42:54,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 79 [2024-01-31 16:42:54,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 209 flow. Second operand has 8 states, 8 states have (on average 30.875) internal successors, (247), 8 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:54,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:54,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 79 [2024-01-31 16:42:54,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand