./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/48_ticket_lock_low_contention_vs-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d8006e4b 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/48_ticket_lock_low_contention_vs-pthread.i ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/48_ticket_lock_low_contention_vs-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-dev-d8006e4-m [2024-02-05 10:26:43,508 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:26:43,590 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:26:43,594 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:26:43,594 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:26:43,608 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:26:43,609 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:26:43,609 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:26:43,610 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:26:43,610 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:26:43,610 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:26:43,610 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:26:43,611 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:26:43,611 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:26:43,611 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:26:43,612 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:26:43,612 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:26:43,612 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:26:43,613 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:26:43,613 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:26:43,613 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:26:43,614 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:26:43,614 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:26:43,614 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:26:43,615 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:26:43,615 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:26:43,615 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:26:43,616 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:26:43,616 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:26:43,616 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:26:43,616 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:26:43,617 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:26:43,617 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:26:43,617 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:26:43,618 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:26:43,618 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:26:43,618 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:26:43,619 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:26:43,619 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:26:43,619 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:26:43,619 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:26:43,620 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:26:43,620 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:26:43,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:26:43,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:26:43,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:26:43,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:26:43,869 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:26:43,869 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:26:43,870 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/48_ticket_lock_low_contention_vs-pthread.yml/witness.yml [2024-02-05 10:26:43,939 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:26:43,943 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:26:43,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2024-02-05 10:26:44,987 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:26:45,206 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:26:45,207 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2024-02-05 10:26:45,215 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a788328d6/8c13eec160b5480e8a0a30b54557e4c1/FLAGc55fc07ac [2024-02-05 10:26:45,225 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a788328d6/8c13eec160b5480e8a0a30b54557e4c1 [2024-02-05 10:26:45,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:26:45,227 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:26:45,234 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:26:45,234 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:26:45,238 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:26:45,239 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:26:43" (1/2) ... [2024-02-05 10:26:45,248 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6400517b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:45, skipping insertion in model container [2024-02-05 10:26:45,249 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:26:43" (1/2) ... [2024-02-05 10:26:45,250 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f377938 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:26:45, skipping insertion in model container [2024-02-05 10:26:45,250 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:26:45" (2/2) ... [2024-02-05 10:26:45,250 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6400517b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45, skipping insertion in model container [2024-02-05 10:26:45,250 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:26:45" (2/2) ... [2024-02-05 10:26:45,251 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:26:45,288 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:26:45,289 INFO L101 nessWitnessExtractor]: Location invariant before [L695-L695] (unsigned long )arg == 0UL [2024-02-05 10:26:45,289 INFO L101 nessWitnessExtractor]: Location invariant before [L694-L694] (c == 0U) && ((unsigned long )arg == 0UL) [2024-02-05 10:26:45,289 INFO L101 nessWitnessExtractor]: Location invariant before [L692-L692] (unsigned long )arg == 0UL [2024-02-05 10:26:45,289 INFO L101 nessWitnessExtractor]: Location invariant before [L693-L693] (c == 1U) && ((unsigned long )arg == 0UL) [2024-02-05 10:26:45,290 INFO L101 nessWitnessExtractor]: Location invariant after [L693-L693] (c == 1U) && ((unsigned long )arg == 0UL) [2024-02-05 10:26:45,290 INFO L101 nessWitnessExtractor]: Location invariant after [L693-L693] (c == 1U) && ((unsigned long )arg == 0UL) [2024-02-05 10:26:45,290 INFO L101 nessWitnessExtractor]: Location invariant before [L693-L693] (c == 1U) && ((unsigned long )arg == 0UL) [2024-02-05 10:26:45,290 INFO L101 nessWitnessExtractor]: Location invariant before [L693-L693] (c == 0U) && ((unsigned long )arg == 0UL) [2024-02-05 10:26:45,331 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:26:45,565 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/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] [2024-02-05 10:26:45,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:26:45,581 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:26:45,633 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/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] Start Parsing Local [2024-02-05 10:26:45,634 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry Start Parsing Local Start Parsing Local [2024-02-05 10:26:45,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:26:45,689 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:26:45,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45 WrapperNode [2024-02-05 10:26:45,691 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:26:45,693 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:26:45,693 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:26:45,693 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:26:45,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (1/1) ... [2024-02-05 10:26:45,743 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (1/1) ... [2024-02-05 10:26:45,787 INFO L138 Inliner]: procedures = 165, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2024-02-05 10:26:45,788 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:26:45,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:26:45,789 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:26:45,789 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:26:45,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (1/1) ... [2024-02-05 10:26:45,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (1/1) ... [2024-02-05 10:26:45,816 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (1/1) ... [2024-02-05 10:26:45,836 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 1, 5]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5]. The 1 writes are split as follows [0, 1, 0]. [2024-02-05 10:26:45,836 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (1/1) ... [2024-02-05 10:26:45,837 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (1/1) ... [2024-02-05 10:26:45,845 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (1/1) ... [2024-02-05 10:26:45,849 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (1/1) ... [2024-02-05 10:26:45,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (1/1) ... [2024-02-05 10:26:45,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (1/1) ... [2024-02-05 10:26:45,860 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:26:45,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:26:45,865 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:26:45,865 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:26:45,866 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (1/1) ... [2024-02-05 10:26:45,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:26:45,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:26:45,891 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) [2024-02-05 10:26:45,897 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 [2024-02-05 10:26:45,920 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-05 10:26:45,920 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-05 10:26:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:26:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:26:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:26:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-05 10:26:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:26:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:26:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:26:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:26:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:26:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:26:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-05 10:26:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:26:45,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:26:45,923 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-05 10:26:46,023 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:26:46,025 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:26:46,170 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:26:46,170 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:26:46,251 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:26:46,252 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-02-05 10:26:46,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:26:46 BoogieIcfgContainer [2024-02-05 10:26:46,252 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:26:46,254 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:26:46,254 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:26:46,256 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:26:46,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:26:43" (1/4) ... [2024-02-05 10:26:46,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a3291 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:26:46, skipping insertion in model container [2024-02-05 10:26:46,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:26:45" (2/4) ... [2024-02-05 10:26:46,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a3291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:26:46, skipping insertion in model container [2024-02-05 10:26:46,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:26:45" (3/4) ... [2024-02-05 10:26:46,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a3291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:26:46, skipping insertion in model container [2024-02-05 10:26:46,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:26:46" (4/4) ... [2024-02-05 10:26:46,259 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs-pthread.i [2024-02-05 10:26:46,272 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:26:46,272 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-02-05 10:26:46,272 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:26:46,308 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:26:46,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 49 transitions, 102 flow [2024-02-05 10:26:46,360 INFO L124 PetriNetUnfolderBase]: 5/74 cut-off events. [2024-02-05 10:26:46,361 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:46,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 74 events. 5/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 233 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 46. Up to 4 conditions per place. [2024-02-05 10:26:46,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 49 transitions, 102 flow [2024-02-05 10:26:46,367 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 49 transitions, 102 flow [2024-02-05 10:26:46,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:26:46,378 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;@6e22570a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:26:46,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-02-05 10:26:46,382 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:26:46,382 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-02-05 10:26:46,382 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:46,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:46,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-05 10:26:46,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-05 10:26:46,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash 7608694, now seen corresponding path program 1 times [2024-02-05 10:26:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:46,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376213977] [2024-02-05 10:26:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:46,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:46,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:46,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376213977] [2024-02-05 10:26:46,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376213977] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:46,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:46,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:46,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336215143] [2024-02-05 10:26:46,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:46,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-05 10:26:46,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-05 10:26:46,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-05 10:26:46,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 49 [2024-02-05 10:26:46,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 102 flow. Second operand has 2 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 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) [2024-02-05 10:26:46,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:46,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 49 [2024-02-05 10:26:46,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:46,628 INFO L124 PetriNetUnfolderBase]: 45/234 cut-off events. [2024-02-05 10:26:46,628 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:46,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 234 events. 45/234 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1209 event pairs, 45 based on Foata normal form. 14/200 useless extension candidates. Maximal degree in co-relation 307. Up to 116 conditions per place. [2024-02-05 10:26:46,632 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 16 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2024-02-05 10:26:46,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 128 flow [2024-02-05 10:26:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-05 10:26:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-05 10:26:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 79 transitions. [2024-02-05 10:26:46,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8061224489795918 [2024-02-05 10:26:46,643 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 102 flow. Second operand 2 states and 79 transitions. [2024-02-05 10:26:46,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 128 flow [2024-02-05 10:26:46,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 128 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:26:46,650 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 96 flow [2024-02-05 10:26:46,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2024-02-05 10:26:46,654 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2024-02-05 10:26:46,655 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 96 flow [2024-02-05 10:26:46,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 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) [2024-02-05 10:26:46,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:46,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:26:46,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:26:46,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-05 10:26:46,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:46,659 INFO L85 PathProgramCache]: Analyzing trace with hash 235923074, now seen corresponding path program 1 times [2024-02-05 10:26:46,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:46,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612439866] [2024-02-05 10:26:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:46,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:46,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:46,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612439866] [2024-02-05 10:26:46,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612439866] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:46,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:46,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:46,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072358766] [2024-02-05 10:26:46,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:46,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:26:46,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:46,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:26:46,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:26:46,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 49 [2024-02-05 10:26:46,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2024-02-05 10:26:46,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:46,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 49 [2024-02-05 10:26:46,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:46,918 INFO L124 PetriNetUnfolderBase]: 45/220 cut-off events. [2024-02-05 10:26:46,922 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:46,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 220 events. 45/220 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1118 event pairs, 20 based on Foata normal form. 7/186 useless extension candidates. Maximal degree in co-relation 337. Up to 60 conditions per place. [2024-02-05 10:26:46,926 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 19 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-02-05 10:26:46,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 144 flow [2024-02-05 10:26:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:26:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:26:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-02-05 10:26:46,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7278911564625851 [2024-02-05 10:26:46,928 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 96 flow. Second operand 3 states and 107 transitions. [2024-02-05 10:26:46,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 144 flow [2024-02-05 10:26:46,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:26:46,931 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 96 flow [2024-02-05 10:26:46,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-02-05 10:26:46,931 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2024-02-05 10:26:46,932 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 96 flow [2024-02-05 10:26:46,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2024-02-05 10:26:46,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:46,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-05 10:26:46,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:26:46,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-05 10:26:46,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:46,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1276240831, now seen corresponding path program 1 times [2024-02-05 10:26:46,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:46,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358310446] [2024-02-05 10:26:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:46,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:47,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:47,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358310446] [2024-02-05 10:26:47,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358310446] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:47,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:47,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:47,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190746096] [2024-02-05 10:26:47,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:47,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:47,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:47,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:47,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:47,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 49 [2024-02-05 10:26:47,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2024-02-05 10:26:47,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:47,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 49 [2024-02-05 10:26:47,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:47,161 INFO L124 PetriNetUnfolderBase]: 54/279 cut-off events. [2024-02-05 10:26:47,161 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-02-05 10:26:47,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 279 events. 54/279 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1484 event pairs, 0 based on Foata normal form. 10/245 useless extension candidates. Maximal degree in co-relation 431. Up to 114 conditions per place. [2024-02-05 10:26:47,165 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 31 selfloop transitions, 2 changer transitions 2/60 dead transitions. [2024-02-05 10:26:47,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 60 transitions, 206 flow [2024-02-05 10:26:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-02-05 10:26:47,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7397959183673469 [2024-02-05 10:26:47,168 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 96 flow. Second operand 4 states and 145 transitions. [2024-02-05 10:26:47,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 60 transitions, 206 flow [2024-02-05 10:26:47,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:47,170 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 92 flow [2024-02-05 10:26:47,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-02-05 10:26:47,172 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-02-05 10:26:47,172 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 92 flow [2024-02-05 10:26:47,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2024-02-05 10:26:47,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:47,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-02-05 10:26:47,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:26:47,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 19 more)] === [2024-02-05 10:26:47,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:47,173 INFO L85 PathProgramCache]: Analyzing trace with hash -908787816, now seen corresponding path program 1 times [2024-02-05 10:26:47,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:47,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758145186] [2024-02-05 10:26:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:47,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:47,202 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-05 10:26:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:47,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-05 10:26:47,233 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-05 10:26:47,234 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2024-02-05 10:26:47,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 22 remaining) [2024-02-05 10:26:47,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 22 remaining) [2024-02-05 10:26:47,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 22 remaining) [2024-02-05 10:26:47,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (17 of 22 remaining) [2024-02-05 10:26:47,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 22 remaining) [2024-02-05 10:26:47,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 22 remaining) [2024-02-05 10:26:47,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 22 remaining) [2024-02-05 10:26:47,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 22 remaining) [2024-02-05 10:26:47,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 22 remaining) [2024-02-05 10:26:47,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 22 remaining) [2024-02-05 10:26:47,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (10 of 22 remaining) [2024-02-05 10:26:47,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 22 remaining) [2024-02-05 10:26:47,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 22 remaining) [2024-02-05 10:26:47,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 22 remaining) [2024-02-05 10:26:47,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 22 remaining) [2024-02-05 10:26:47,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 22 remaining) [2024-02-05 10:26:47,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 22 remaining) [2024-02-05 10:26:47,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (3 of 22 remaining) [2024-02-05 10:26:47,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 22 remaining) [2024-02-05 10:26:47,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 22 remaining) [2024-02-05 10:26:47,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 22 remaining) [2024-02-05 10:26:47,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:26:47,242 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-02-05 10:26:47,247 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-05 10:26:47,247 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-05 10:26:47,273 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:26:47,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 152 flow [2024-02-05 10:26:47,283 INFO L124 PetriNetUnfolderBase]: 8/121 cut-off events. [2024-02-05 10:26:47,283 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:26:47,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 121 events. 8/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 506 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 76. Up to 6 conditions per place. [2024-02-05 10:26:47,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 71 transitions, 152 flow [2024-02-05 10:26:47,285 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 152 flow [2024-02-05 10:26:47,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:26:47,286 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;@6e22570a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:26:47,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-02-05 10:26:47,287 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:26:47,287 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-02-05 10:26:47,287 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:47,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:47,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-05 10:26:47,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:47,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:47,288 INFO L85 PathProgramCache]: Analyzing trace with hash 9794358, now seen corresponding path program 1 times [2024-02-05 10:26:47,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:47,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392824402] [2024-02-05 10:26:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:47,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:47,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:47,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392824402] [2024-02-05 10:26:47,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392824402] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:47,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:47,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:47,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476659785] [2024-02-05 10:26:47,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:47,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-05 10:26:47,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:47,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-05 10:26:47,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-05 10:26:47,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 71 [2024-02-05 10:26:47,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 152 flow. Second operand has 2 states, 2 states have (on average 46.5) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:47,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:47,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 71 [2024-02-05 10:26:47,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:47,541 INFO L124 PetriNetUnfolderBase]: 615/1788 cut-off events. [2024-02-05 10:26:47,541 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-02-05 10:26:47,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2857 conditions, 1788 events. 615/1788 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 14418 event pairs, 615 based on Foata normal form. 152/1634 useless extension candidates. Maximal degree in co-relation 433. Up to 1046 conditions per place. [2024-02-05 10:26:47,551 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 22 selfloop transitions, 0 changer transitions 0/67 dead transitions. [2024-02-05 10:26:47,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 188 flow [2024-02-05 10:26:47,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-05 10:26:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-05 10:26:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 116 transitions. [2024-02-05 10:26:47,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8169014084507042 [2024-02-05 10:26:47,553 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 152 flow. Second operand 2 states and 116 transitions. [2024-02-05 10:26:47,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 188 flow [2024-02-05 10:26:47,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:26:47,555 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 144 flow [2024-02-05 10:26:47,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-02-05 10:26:47,556 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-02-05 10:26:47,557 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 144 flow [2024-02-05 10:26:47,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 46.5) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:47,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:47,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:26:47,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:26:47,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:47,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:47,558 INFO L85 PathProgramCache]: Analyzing trace with hash 303678729, now seen corresponding path program 1 times [2024-02-05 10:26:47,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:47,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786556333] [2024-02-05 10:26:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:47,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:47,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:47,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786556333] [2024-02-05 10:26:47,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786556333] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:47,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:47,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:47,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107234646] [2024-02-05 10:26:47,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:47,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:26:47,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:26:47,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:26:47,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 71 [2024-02-05 10:26:47,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2024-02-05 10:26:47,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:47,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 71 [2024-02-05 10:26:47,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:47,765 INFO L124 PetriNetUnfolderBase]: 615/1702 cut-off events. [2024-02-05 10:26:47,765 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-02-05 10:26:47,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2772 conditions, 1702 events. 615/1702 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13377 event pairs, 290 based on Foata normal form. 43/1482 useless extension candidates. Maximal degree in co-relation 2767. Up to 540 conditions per place. [2024-02-05 10:26:47,773 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 30 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-02-05 10:26:47,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 75 transitions, 224 flow [2024-02-05 10:26:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:26:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:26:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2024-02-05 10:26:47,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7652582159624414 [2024-02-05 10:26:47,775 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 144 flow. Second operand 3 states and 163 transitions. [2024-02-05 10:26:47,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 75 transitions, 224 flow [2024-02-05 10:26:47,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 75 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:26:47,777 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 144 flow [2024-02-05 10:26:47,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2024-02-05 10:26:47,778 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-02-05 10:26:47,778 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 144 flow [2024-02-05 10:26:47,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2024-02-05 10:26:47,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:47,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-05 10:26:47,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:26:47,779 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:47,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash 824205398, now seen corresponding path program 1 times [2024-02-05 10:26:47,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:47,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671496045] [2024-02-05 10:26:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:47,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:47,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:47,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671496045] [2024-02-05 10:26:47,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671496045] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:47,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:47,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:47,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339503665] [2024-02-05 10:26:47,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:47,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:47,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:47,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:47,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:47,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 71 [2024-02-05 10:26:47,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 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) [2024-02-05 10:26:47,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:47,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 71 [2024-02-05 10:26:47,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:48,076 INFO L124 PetriNetUnfolderBase]: 729/2300 cut-off events. [2024-02-05 10:26:48,077 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-02-05 10:26:48,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3658 conditions, 2300 events. 729/2300 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 19386 event pairs, 455 based on Foata normal form. 70/2004 useless extension candidates. Maximal degree in co-relation 3652. Up to 1104 conditions per place. [2024-02-05 10:26:48,086 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 43 selfloop transitions, 2 changer transitions 2/87 dead transitions. [2024-02-05 10:26:48,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 295 flow [2024-02-05 10:26:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 217 transitions. [2024-02-05 10:26:48,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7640845070422535 [2024-02-05 10:26:48,087 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 144 flow. Second operand 4 states and 217 transitions. [2024-02-05 10:26:48,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 295 flow [2024-02-05 10:26:48,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:48,092 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 140 flow [2024-02-05 10:26:48,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-02-05 10:26:48,093 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 0 predicate places. [2024-02-05 10:26:48,093 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 140 flow [2024-02-05 10:26:48,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 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) [2024-02-05 10:26:48,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:48,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:48,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-05 10:26:48,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:48,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:48,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1692176227, now seen corresponding path program 1 times [2024-02-05 10:26:48,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:48,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137140225] [2024-02-05 10:26:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:48,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:48,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:48,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137140225] [2024-02-05 10:26:48,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137140225] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:48,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:48,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:48,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675899662] [2024-02-05 10:26:48,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:48,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:48,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:48,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:48,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2024-02-05 10:26:48,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2024-02-05 10:26:48,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:48,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2024-02-05 10:26:48,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:48,680 INFO L124 PetriNetUnfolderBase]: 2271/5910 cut-off events. [2024-02-05 10:26:48,681 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-02-05 10:26:48,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10077 conditions, 5910 events. 2271/5910 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 56963 event pairs, 726 based on Foata normal form. 654/6077 useless extension candidates. Maximal degree in co-relation 10071. Up to 2016 conditions per place. [2024-02-05 10:26:48,709 INFO L140 encePairwiseOnDemand]: 52/71 looper letters, 53 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2024-02-05 10:26:48,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 349 flow [2024-02-05 10:26:48,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2024-02-05 10:26:48,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7605633802816901 [2024-02-05 10:26:48,710 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 140 flow. Second operand 4 states and 216 transitions. [2024-02-05 10:26:48,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 349 flow [2024-02-05 10:26:48,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:48,712 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 241 flow [2024-02-05 10:26:48,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2024-02-05 10:26:48,713 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2024-02-05 10:26:48,713 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 241 flow [2024-02-05 10:26:48,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2024-02-05 10:26:48,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:48,714 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-02-05 10:26:48,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-05 10:26:48,714 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:48,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:48,714 INFO L85 PathProgramCache]: Analyzing trace with hash -471577214, now seen corresponding path program 1 times [2024-02-05 10:26:48,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:48,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425341760] [2024-02-05 10:26:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:48,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-05 10:26:48,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:48,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425341760] [2024-02-05 10:26:48,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425341760] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:48,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:48,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:48,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987863047] [2024-02-05 10:26:48,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:48,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:48,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:48,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:48,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:48,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 71 [2024-02-05 10:26:48,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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) [2024-02-05 10:26:48,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:48,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 71 [2024-02-05 10:26:48,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:49,133 INFO L124 PetriNetUnfolderBase]: 1633/5070 cut-off events. [2024-02-05 10:26:49,133 INFO L125 PetriNetUnfolderBase]: For 1649/1822 co-relation queries the response was YES. [2024-02-05 10:26:49,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10472 conditions, 5070 events. 1633/5070 cut-off events. For 1649/1822 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 51509 event pairs, 533 based on Foata normal form. 106/4811 useless extension candidates. Maximal degree in co-relation 10464. Up to 2193 conditions per place. [2024-02-05 10:26:49,163 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 69 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-02-05 10:26:49,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 111 transitions, 527 flow [2024-02-05 10:26:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2024-02-05 10:26:49,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.778169014084507 [2024-02-05 10:26:49,165 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 241 flow. Second operand 4 states and 221 transitions. [2024-02-05 10:26:49,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 111 transitions, 527 flow [2024-02-05 10:26:49,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 111 transitions, 527 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:26:49,169 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 241 flow [2024-02-05 10:26:49,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-02-05 10:26:49,171 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2024-02-05 10:26:49,171 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 241 flow [2024-02-05 10:26:49,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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) [2024-02-05 10:26:49,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:49,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:49,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:26:49,172 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:49,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:49,172 INFO L85 PathProgramCache]: Analyzing trace with hash 917855796, now seen corresponding path program 1 times [2024-02-05 10:26:49,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:49,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249741249] [2024-02-05 10:26:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:49,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:49,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:49,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249741249] [2024-02-05 10:26:49,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249741249] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:49,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:49,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:49,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907852588] [2024-02-05 10:26:49,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:49,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:49,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:49,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:49,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2024-02-05 10:26:49,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2024-02-05 10:26:49,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:49,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2024-02-05 10:26:49,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:49,871 INFO L124 PetriNetUnfolderBase]: 3228/7612 cut-off events. [2024-02-05 10:26:49,871 INFO L125 PetriNetUnfolderBase]: For 3061/3305 co-relation queries the response was YES. [2024-02-05 10:26:49,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17382 conditions, 7612 events. 3228/7612 cut-off events. For 3061/3305 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 72817 event pairs, 1329 based on Foata normal form. 625/7946 useless extension candidates. Maximal degree in co-relation 17373. Up to 3237 conditions per place. [2024-02-05 10:26:49,899 INFO L140 encePairwiseOnDemand]: 55/71 looper letters, 53 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-02-05 10:26:49,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 99 transitions, 463 flow [2024-02-05 10:26:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 201 transitions. [2024-02-05 10:26:49,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7077464788732394 [2024-02-05 10:26:49,917 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 241 flow. Second operand 4 states and 201 transitions. [2024-02-05 10:26:49,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 99 transitions, 463 flow [2024-02-05 10:26:49,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 460 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:49,919 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 365 flow [2024-02-05 10:26:49,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=365, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-02-05 10:26:49,920 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2024-02-05 10:26:49,920 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 365 flow [2024-02-05 10:26:49,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2024-02-05 10:26:49,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:49,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:49,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-05 10:26:49,920 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:49,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:49,921 INFO L85 PathProgramCache]: Analyzing trace with hash -424674809, now seen corresponding path program 1 times [2024-02-05 10:26:49,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:49,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568411425] [2024-02-05 10:26:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:49,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:49,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:49,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568411425] [2024-02-05 10:26:49,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568411425] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:49,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:49,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:49,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762277301] [2024-02-05 10:26:49,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:49,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:49,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:49,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:49,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:50,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2024-02-05 10:26:50,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2024-02-05 10:26:50,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:50,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2024-02-05 10:26:50,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:51,006 INFO L124 PetriNetUnfolderBase]: 4489/10631 cut-off events. [2024-02-05 10:26:51,006 INFO L125 PetriNetUnfolderBase]: For 10181/10204 co-relation queries the response was YES. [2024-02-05 10:26:51,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28918 conditions, 10631 events. 4489/10631 cut-off events. For 10181/10204 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 104171 event pairs, 1530 based on Foata normal form. 261/10439 useless extension candidates. Maximal degree in co-relation 28907. Up to 3517 conditions per place. [2024-02-05 10:26:51,062 INFO L140 encePairwiseOnDemand]: 59/71 looper letters, 64 selfloop transitions, 24 changer transitions 0/118 dead transitions. [2024-02-05 10:26:51,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 700 flow [2024-02-05 10:26:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 203 transitions. [2024-02-05 10:26:51,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7147887323943662 [2024-02-05 10:26:51,063 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 365 flow. Second operand 4 states and 203 transitions. [2024-02-05 10:26:51,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 700 flow [2024-02-05 10:26:51,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 692 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:26:51,068 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 512 flow [2024-02-05 10:26:51,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=512, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-02-05 10:26:51,069 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 11 predicate places. [2024-02-05 10:26:51,069 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 512 flow [2024-02-05 10:26:51,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2024-02-05 10:26:51,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:51,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1] [2024-02-05 10:26:51,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-05 10:26:51,070 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:26:51,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:51,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1734019373, now seen corresponding path program 1 times [2024-02-05 10:26:51,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:51,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667985686] [2024-02-05 10:26:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:51,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:51,080 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-05 10:26:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:26:51,087 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-05 10:26:51,087 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-05 10:26:51,088 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 29 remaining) [2024-02-05 10:26:51,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 29 remaining) [2024-02-05 10:26:51,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 29 remaining) [2024-02-05 10:26:51,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 29 remaining) [2024-02-05 10:26:51,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (24 of 29 remaining) [2024-02-05 10:26:51,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 29 remaining) [2024-02-05 10:26:51,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 29 remaining) [2024-02-05 10:26:51,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 29 remaining) [2024-02-05 10:26:51,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 29 remaining) [2024-02-05 10:26:51,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 29 remaining) [2024-02-05 10:26:51,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 29 remaining) [2024-02-05 10:26:51,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (17 of 29 remaining) [2024-02-05 10:26:51,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 29 remaining) [2024-02-05 10:26:51,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 29 remaining) [2024-02-05 10:26:51,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 29 remaining) [2024-02-05 10:26:51,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 29 remaining) [2024-02-05 10:26:51,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 29 remaining) [2024-02-05 10:26:51,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 29 remaining) [2024-02-05 10:26:51,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (10 of 29 remaining) [2024-02-05 10:26:51,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 29 remaining) [2024-02-05 10:26:51,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 29 remaining) [2024-02-05 10:26:51,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 29 remaining) [2024-02-05 10:26:51,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 29 remaining) [2024-02-05 10:26:51,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 29 remaining) [2024-02-05 10:26:51,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 29 remaining) [2024-02-05 10:26:51,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONERROR_FUNCTION (3 of 29 remaining) [2024-02-05 10:26:51,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 29 remaining) [2024-02-05 10:26:51,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 29 remaining) [2024-02-05 10:26:51,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 29 remaining) [2024-02-05 10:26:51,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-05 10:26:51,092 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:51,092 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-05 10:26:51,092 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-05 10:26:51,115 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:26:51,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 93 transitions, 204 flow [2024-02-05 10:26:51,267 INFO L124 PetriNetUnfolderBase]: 11/168 cut-off events. [2024-02-05 10:26:51,267 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-05 10:26:51,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 168 events. 11/168 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 814 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 127. Up to 8 conditions per place. [2024-02-05 10:26:51,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 93 transitions, 204 flow [2024-02-05 10:26:51,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 93 transitions, 204 flow [2024-02-05 10:26:51,269 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:26:51,269 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;@6e22570a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:26:51,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2024-02-05 10:26:51,270 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:26:51,271 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-02-05 10:26:51,271 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:26:51,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:51,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-05 10:26:51,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:26:51,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash 12657270, now seen corresponding path program 1 times [2024-02-05 10:26:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:51,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5171924] [2024-02-05 10:26:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:51,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:51,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:51,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5171924] [2024-02-05 10:26:51,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5171924] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:51,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:51,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:51,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803607663] [2024-02-05 10:26:51,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:51,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-05 10:26:51,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:51,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-05 10:26:51,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-05 10:26:51,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 93 [2024-02-05 10:26:51,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 61.5) internal successors, (123), 2 states have internal predecessors, (123), 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) [2024-02-05 10:26:51,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:51,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 93 [2024-02-05 10:26:51,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:52,267 INFO L124 PetriNetUnfolderBase]: 5835/12912 cut-off events. [2024-02-05 10:26:52,268 INFO L125 PetriNetUnfolderBase]: For 762/762 co-relation queries the response was YES. [2024-02-05 10:26:52,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21506 conditions, 12912 events. 5835/12912 cut-off events. For 762/762 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 125669 event pairs, 5835 based on Foata normal form. 1340/12398 useless extension candidates. Maximal degree in co-relation 2858. Up to 8426 conditions per place. [2024-02-05 10:26:52,327 INFO L140 encePairwiseOnDemand]: 88/93 looper letters, 28 selfloop transitions, 0 changer transitions 0/88 dead transitions. [2024-02-05 10:26:52,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 88 transitions, 250 flow [2024-02-05 10:26:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-05 10:26:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-05 10:26:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 153 transitions. [2024-02-05 10:26:52,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8225806451612904 [2024-02-05 10:26:52,329 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 204 flow. Second operand 2 states and 153 transitions. [2024-02-05 10:26:52,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 88 transitions, 250 flow [2024-02-05 10:26:52,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 88 transitions, 248 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-02-05 10:26:52,331 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 192 flow [2024-02-05 10:26:52,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2024-02-05 10:26:52,331 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 1 predicate places. [2024-02-05 10:26:52,331 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 192 flow [2024-02-05 10:26:52,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 61.5) internal successors, (123), 2 states have internal predecessors, (123), 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) [2024-02-05 10:26:52,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:52,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:26:52,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-05 10:26:52,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:26:52,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash 392429094, now seen corresponding path program 1 times [2024-02-05 10:26:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:52,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154878127] [2024-02-05 10:26:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:52,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:52,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154878127] [2024-02-05 10:26:52,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154878127] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:52,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:52,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:52,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258890581] [2024-02-05 10:26:52,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:52,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:26:52,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:52,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:26:52,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:26:52,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 93 [2024-02-05 10:26:52,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2024-02-05 10:26:52,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:52,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 93 [2024-02-05 10:26:52,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:53,361 INFO L124 PetriNetUnfolderBase]: 5835/12394 cut-off events. [2024-02-05 10:26:53,361 INFO L125 PetriNetUnfolderBase]: For 690/690 co-relation queries the response was YES. [2024-02-05 10:26:53,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20953 conditions, 12394 events. 5835/12394 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 116987 event pairs, 2810 based on Foata normal form. 259/11058 useless extension candidates. Maximal degree in co-relation 20947. Up to 4320 conditions per place. [2024-02-05 10:26:53,432 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 41 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2024-02-05 10:26:53,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 101 transitions, 304 flow [2024-02-05 10:26:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:26:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:26:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2024-02-05 10:26:53,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7849462365591398 [2024-02-05 10:26:53,433 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 192 flow. Second operand 3 states and 219 transitions. [2024-02-05 10:26:53,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 101 transitions, 304 flow [2024-02-05 10:26:53,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 101 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:26:53,436 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 192 flow [2024-02-05 10:26:53,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2024-02-05 10:26:53,436 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 1 predicate places. [2024-02-05 10:26:53,436 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 192 flow [2024-02-05 10:26:53,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2024-02-05 10:26:53,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:53,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-05 10:26:53,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-05 10:26:53,437 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:26:53,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:53,438 INFO L85 PathProgramCache]: Analyzing trace with hash -719480309, now seen corresponding path program 1 times [2024-02-05 10:26:53,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:53,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217931476] [2024-02-05 10:26:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:53,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:53,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:53,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217931476] [2024-02-05 10:26:53,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217931476] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:53,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:53,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:53,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687807246] [2024-02-05 10:26:53,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:53,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:53,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:53,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:53,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:53,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 93 [2024-02-05 10:26:53,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 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) [2024-02-05 10:26:53,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:53,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 93 [2024-02-05 10:26:53,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:54,589 INFO L124 PetriNetUnfolderBase]: 6879/16670 cut-off events. [2024-02-05 10:26:54,589 INFO L125 PetriNetUnfolderBase]: For 801/801 co-relation queries the response was YES. [2024-02-05 10:26:54,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27329 conditions, 16670 events. 6879/16670 cut-off events. For 801/801 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 173810 event pairs, 5135 based on Foata normal form. 430/14974 useless extension candidates. Maximal degree in co-relation 27322. Up to 8844 conditions per place. [2024-02-05 10:26:54,678 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 55 selfloop transitions, 2 changer transitions 2/114 dead transitions. [2024-02-05 10:26:54,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 114 transitions, 384 flow [2024-02-05 10:26:54,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 289 transitions. [2024-02-05 10:26:54,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7768817204301075 [2024-02-05 10:26:54,679 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 192 flow. Second operand 4 states and 289 transitions. [2024-02-05 10:26:54,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 114 transitions, 384 flow [2024-02-05 10:26:54,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 114 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:54,686 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 188 flow [2024-02-05 10:26:54,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2024-02-05 10:26:54,686 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 0 predicate places. [2024-02-05 10:26:54,687 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 188 flow [2024-02-05 10:26:54,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 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) [2024-02-05 10:26:54,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:54,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-05 10:26:54,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:26:54,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:54,688 INFO L85 PathProgramCache]: Analyzing trace with hash -45462045, now seen corresponding path program 1 times [2024-02-05 10:26:54,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:54,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84118261] [2024-02-05 10:26:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:54,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:54,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:54,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84118261] [2024-02-05 10:26:54,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84118261] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:54,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:54,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:26:54,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276984367] [2024-02-05 10:26:54,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:54,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:54,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:54,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:54,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 93 [2024-02-05 10:26:54,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:54,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:54,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 93 [2024-02-05 10:26:54,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:59,394 INFO L124 PetriNetUnfolderBase]: 32261/67799 cut-off events. [2024-02-05 10:26:59,397 INFO L125 PetriNetUnfolderBase]: For 694/694 co-relation queries the response was YES. [2024-02-05 10:26:59,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117840 conditions, 67799 events. 32261/67799 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 2938. Compared 802725 event pairs, 11813 based on Foata normal form. 10437/73347 useless extension candidates. Maximal degree in co-relation 117833. Up to 25995 conditions per place. [2024-02-05 10:26:59,831 INFO L140 encePairwiseOnDemand]: 70/93 looper letters, 67 selfloop transitions, 17 changer transitions 0/128 dead transitions. [2024-02-05 10:26:59,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 454 flow [2024-02-05 10:26:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:26:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:26:59,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2024-02-05 10:26:59,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.782258064516129 [2024-02-05 10:26:59,833 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 188 flow. Second operand 4 states and 291 transitions. [2024-02-05 10:26:59,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 454 flow [2024-02-05 10:26:59,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 128 transitions, 451 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:26:59,836 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 312 flow [2024-02-05 10:26:59,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2024-02-05 10:26:59,837 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 3 predicate places. [2024-02-05 10:26:59,837 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 312 flow [2024-02-05 10:26:59,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:59,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:26:59,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-02-05 10:26:59,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-05 10:26:59,838 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:26:59,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:26:59,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2097444991, now seen corresponding path program 1 times [2024-02-05 10:26:59,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:26:59,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211223085] [2024-02-05 10:26:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:26:59,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:26:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:26:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-05 10:26:59,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:26:59,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211223085] [2024-02-05 10:26:59,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211223085] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:26:59,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:26:59,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:26:59,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610655832] [2024-02-05 10:26:59,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:26:59,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:26:59,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:59,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:26:59,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:26:59,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 93 [2024-02-05 10:26:59,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 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) [2024-02-05 10:26:59,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:59,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 93 [2024-02-05 10:26:59,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:27:04,316 INFO L124 PetriNetUnfolderBase]: 23662/58986 cut-off events. [2024-02-05 10:27:04,316 INFO L125 PetriNetUnfolderBase]: For 18034/20702 co-relation queries the response was YES. [2024-02-05 10:27:04,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124000 conditions, 58986 events. 23662/58986 cut-off events. For 18034/20702 co-relation queries the response was YES. Maximal size of possible extension queue 2713. Compared 771609 event pairs, 5954 based on Foata normal form. 1199/56213 useless extension candidates. Maximal degree in co-relation 123991. Up to 28440 conditions per place. [2024-02-05 10:27:04,688 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 85 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2024-02-05 10:27:04,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 662 flow [2024-02-05 10:27:04,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:27:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:27:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 293 transitions. [2024-02-05 10:27:04,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7876344086021505 [2024-02-05 10:27:04,690 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 312 flow. Second operand 4 states and 293 transitions. [2024-02-05 10:27:04,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 662 flow [2024-02-05 10:27:04,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 662 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:27:04,693 INFO L231 Difference]: Finished difference. Result has 99 places, 94 transitions, 312 flow [2024-02-05 10:27:04,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=99, PETRI_TRANSITIONS=94} [2024-02-05 10:27:04,693 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 4 predicate places. [2024-02-05 10:27:04,693 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 94 transitions, 312 flow [2024-02-05 10:27:04,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 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) [2024-02-05 10:27:04,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:27:04,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:27:04,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-05 10:27:04,694 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:27:04,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:27:04,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1409322991, now seen corresponding path program 1 times [2024-02-05 10:27:04,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:27:04,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905669777] [2024-02-05 10:27:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:27:04,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:27:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:27:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:27:04,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:27:04,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905669777] [2024-02-05 10:27:04,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905669777] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:27:04,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:27:04,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:27:04,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989794396] [2024-02-05 10:27:04,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:27:04,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:27:04,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:27:04,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:27:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:27:04,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 93 [2024-02-05 10:27:04,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2024-02-05 10:27:04,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:27:04,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 93 [2024-02-05 10:27:04,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:27:13,812 INFO L124 PetriNetUnfolderBase]: 57787/113560 cut-off events. [2024-02-05 10:27:13,813 INFO L125 PetriNetUnfolderBase]: For 41406/45698 co-relation queries the response was YES. [2024-02-05 10:27:14,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258405 conditions, 113560 events. 57787/113560 cut-off events. For 41406/45698 co-relation queries the response was YES. Maximal size of possible extension queue 4879. Compared 1354281 event pairs, 22589 based on Foata normal form. 8288/118110 useless extension candidates. Maximal degree in co-relation 258395. Up to 48072 conditions per place. [2024-02-05 10:27:14,907 INFO L140 encePairwiseOnDemand]: 73/93 looper letters, 71 selfloop transitions, 21 changer transitions 0/134 dead transitions. [2024-02-05 10:27:14,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 613 flow [2024-02-05 10:27:14,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:27:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:27:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 275 transitions. [2024-02-05 10:27:14,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.739247311827957 [2024-02-05 10:27:14,909 INFO L175 Difference]: Start difference. First operand has 99 places, 94 transitions, 312 flow. Second operand 4 states and 275 transitions. [2024-02-05 10:27:14,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 613 flow [2024-02-05 10:27:14,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 134 transitions, 610 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:27:14,912 INFO L231 Difference]: Finished difference. Result has 102 places, 104 transitions, 478 flow [2024-02-05 10:27:14,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=478, PETRI_PLACES=102, PETRI_TRANSITIONS=104} [2024-02-05 10:27:14,913 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 7 predicate places. [2024-02-05 10:27:14,913 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 104 transitions, 478 flow [2024-02-05 10:27:14,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2024-02-05 10:27:14,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:27:14,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:27:14,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-05 10:27:14,914 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:27:14,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:27:14,914 INFO L85 PathProgramCache]: Analyzing trace with hash 2144325871, now seen corresponding path program 1 times [2024-02-05 10:27:14,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:27:14,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733661794] [2024-02-05 10:27:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:27:14,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:27:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:27:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:27:14,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:27:14,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733661794] [2024-02-05 10:27:14,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733661794] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:27:14,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:27:14,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:27:14,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646877607] [2024-02-05 10:27:14,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:27:14,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:27:14,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:27:14,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:27:14,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:27:15,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 93 [2024-02-05 10:27:15,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 104 transitions, 478 flow. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 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) [2024-02-05 10:27:15,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:27:15,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 93 [2024-02-05 10:27:15,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:27:28,405 INFO L124 PetriNetUnfolderBase]: 83235/164875 cut-off events. [2024-02-05 10:27:28,406 INFO L125 PetriNetUnfolderBase]: For 160443/161075 co-relation queries the response was YES. [2024-02-05 10:27:28,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450266 conditions, 164875 events. 83235/164875 cut-off events. For 160443/161075 co-relation queries the response was YES. Maximal size of possible extension queue 6615. Compared 2036617 event pairs, 30473 based on Foata normal form. 2724/159183 useless extension candidates. Maximal degree in co-relation 450254. Up to 60713 conditions per place. [2024-02-05 10:27:29,733 INFO L140 encePairwiseOnDemand]: 79/93 looper letters, 80 selfloop transitions, 33 changer transitions 0/156 dead transitions. [2024-02-05 10:27:29,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 156 transitions, 923 flow [2024-02-05 10:27:29,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:27:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:27:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2024-02-05 10:27:29,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7338709677419355 [2024-02-05 10:27:29,734 INFO L175 Difference]: Start difference. First operand has 102 places, 104 transitions, 478 flow. Second operand 4 states and 273 transitions. [2024-02-05 10:27:29,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 156 transitions, 923 flow [2024-02-05 10:27:29,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 156 transitions, 915 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:27:29,817 INFO L231 Difference]: Finished difference. Result has 106 places, 118 transitions, 686 flow [2024-02-05 10:27:29,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=686, PETRI_PLACES=106, PETRI_TRANSITIONS=118} [2024-02-05 10:27:29,818 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 11 predicate places. [2024-02-05 10:27:29,818 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 118 transitions, 686 flow [2024-02-05 10:27:29,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 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) [2024-02-05 10:27:29,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:27:29,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:27:29,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-05 10:27:29,819 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 33 more)] === [2024-02-05 10:27:29,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:27:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2049593006, now seen corresponding path program 1 times [2024-02-05 10:27:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:27:29,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892549599] [2024-02-05 10:27:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:27:29,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:27:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:27:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:27:29,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:27:29,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892549599] [2024-02-05 10:27:29,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892549599] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:27:29,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:27:29,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:27:29,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516474415] [2024-02-05 10:27:29,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:27:29,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:27:29,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:27:29,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:27:29,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:27:29,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 93 [2024-02-05 10:27:29,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 118 transitions, 686 flow. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 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) [2024-02-05 10:27:29,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:27:29,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 93 [2024-02-05 10:27:29,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:27:32,016 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([400] L693-7-->L694: Formula: (and (= v_~c~0_30 0) (= (mod (+ v_thr1Thread3of3ForFork0_~arg.base_17 v_thr1Thread3of3ForFork0_~arg.offset_17) 4294967296) 0) (= (mod v_~c~0_31 4294967296) 1)) InVars {thr1Thread3of3ForFork0_~arg.offset=v_thr1Thread3of3ForFork0_~arg.offset_17, thr1Thread3of3ForFork0_~arg.base=v_thr1Thread3of3ForFork0_~arg.base_17, ~c~0=v_~c~0_31} OutVars{thr1Thread3of3ForFork0_~arg.offset=v_thr1Thread3of3ForFork0_~arg.offset_17, thr1Thread3of3ForFork0_~arg.base=v_thr1Thread3of3ForFork0_~arg.base_17, ~c~0=v_~c~0_30} AuxVars[] AssignedVars[~c~0][112], [thr1Thread3of3ForFork0InUse, 37#L693-4true, Black: 132#(and (= ~c~0 0) (= (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) (* (div (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) 4294967296) 4294967296))), 80#L692-1true, 137#(= (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) (* (div (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) 4294967296) 4294967296)), 131#(= ~c~0 0), 108#(and (= thr1Thread1of3ForFork0_~arg.offset 0) (= thr1Thread1of3ForFork0_~arg.base 0) (= |thr1Thread1of3ForFork0_#in~arg.offset| 0) (= |thr1Thread1of3ForFork0_#in~arg.base| 0)), 52#L694true, 125#(= (* 4294967296 (div (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|) 4294967296)) (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|)), 112#(= ~c~0 0), Black: 113#(and (= ~c~0 0) (= (* 4294967296 (div (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|) 4294967296)) (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|))), 98#true, 58#L692-1true, thr1Thread1of3ForFork0InUse, thr1Thread2of3ForFork0InUse, 121#(and (= thr1Thread2of3ForFork0_~arg.base 0) (= |thr1Thread2of3ForFork0_#in~arg.offset| 0) (= |thr1Thread2of3ForFork0_#in~arg.base| 0) (= thr1Thread2of3ForFork0_~arg.offset 0)), Black: 126#(and (= ~c~0 1) (= (* 4294967296 (div (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|) 4294967296)) (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|)))]) [2024-02-05 10:27:32,016 INFO L294 olderBase$Statistics]: this new event has 31 ancestors and is cut-off event [2024-02-05 10:27:32,017 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-02-05 10:27:32,017 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-02-05 10:27:32,017 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-02-05 10:27:32,371 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([400] L693-7-->L694: Formula: (and (= v_~c~0_30 0) (= (mod (+ v_thr1Thread3of3ForFork0_~arg.base_17 v_thr1Thread3of3ForFork0_~arg.offset_17) 4294967296) 0) (= (mod v_~c~0_31 4294967296) 1)) InVars {thr1Thread3of3ForFork0_~arg.offset=v_thr1Thread3of3ForFork0_~arg.offset_17, thr1Thread3of3ForFork0_~arg.base=v_thr1Thread3of3ForFork0_~arg.base_17, ~c~0=v_~c~0_31} OutVars{thr1Thread3of3ForFork0_~arg.offset=v_thr1Thread3of3ForFork0_~arg.offset_17, thr1Thread3of3ForFork0_~arg.base=v_thr1Thread3of3ForFork0_~arg.base_17, ~c~0=v_~c~0_30} AuxVars[] AssignedVars[~c~0][112], [thr1Thread3of3ForFork0InUse, 37#L693-4true, Black: 132#(and (= ~c~0 0) (= (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) (* (div (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) 4294967296) 4294967296))), 137#(= (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) (* (div (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) 4294967296) 4294967296)), 131#(= ~c~0 0), 108#(and (= thr1Thread1of3ForFork0_~arg.offset 0) (= thr1Thread1of3ForFork0_~arg.base 0) (= |thr1Thread1of3ForFork0_#in~arg.offset| 0) (= |thr1Thread1of3ForFork0_#in~arg.base| 0)), 52#L694true, 125#(= (* 4294967296 (div (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|) 4294967296)) (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|)), Black: 113#(and (= ~c~0 0) (= (* 4294967296 (div (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|) 4294967296)) (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|))), 112#(= ~c~0 0), 90#L692-4true, 98#true, 58#L692-1true, thr1Thread1of3ForFork0InUse, thr1Thread2of3ForFork0InUse, 121#(and (= thr1Thread2of3ForFork0_~arg.base 0) (= |thr1Thread2of3ForFork0_#in~arg.offset| 0) (= |thr1Thread2of3ForFork0_#in~arg.base| 0) (= thr1Thread2of3ForFork0_~arg.offset 0)), Black: 126#(and (= ~c~0 1) (= (* 4294967296 (div (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|) 4294967296)) (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|)))]) [2024-02-05 10:27:32,372 INFO L294 olderBase$Statistics]: this new event has 32 ancestors and is cut-off event [2024-02-05 10:27:32,372 INFO L297 olderBase$Statistics]: existing Event has 32 ancestors and is cut-off event [2024-02-05 10:27:32,372 INFO L297 olderBase$Statistics]: existing Event has 32 ancestors and is cut-off event [2024-02-05 10:27:32,372 INFO L297 olderBase$Statistics]: existing Event has 32 ancestors and is cut-off event [2024-02-05 10:27:33,780 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([415] L693-2-->L693-3: Formula: (and (= (mod (+ v_thr1Thread1of3ForFork0_~arg.offset_13 v_thr1Thread1of3ForFork0_~arg.base_13) 4294967296) 0) (= (mod v_~c~0_5 4294967296) 1)) InVars {thr1Thread1of3ForFork0_~arg.offset=v_thr1Thread1of3ForFork0_~arg.offset_13, ~c~0=v_~c~0_5, thr1Thread1of3ForFork0_~arg.base=v_thr1Thread1of3ForFork0_~arg.base_13} OutVars{thr1Thread1of3ForFork0_~arg.offset=v_thr1Thread1of3ForFork0_~arg.offset_13, ~c~0=v_~c~0_5, thr1Thread1of3ForFork0_~arg.base=v_thr1Thread1of3ForFork0_~arg.base_13} AuxVars[] AssignedVars[][28], [thr1Thread3of3ForFork0InUse, Black: 125#(= (* 4294967296 (div (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|) 4294967296)) (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|)), 37#L693-4true, Black: 132#(and (= ~c~0 0) (= (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) (* (div (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) 4294967296) 4294967296))), 110#true, Black: 131#(= ~c~0 0), 47#L693-7true, 108#(and (= thr1Thread1of3ForFork0_~arg.offset 0) (= thr1Thread1of3ForFork0_~arg.base 0) (= |thr1Thread1of3ForFork0_#in~arg.offset| 0) (= |thr1Thread1of3ForFork0_#in~arg.base| 0)), Black: 113#(and (= ~c~0 0) (= (* 4294967296 (div (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|) 4294967296)) (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|))), Black: 112#(= ~c~0 0), 138#(and (= ~c~0 1) (= (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) (* (div (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) 4294967296) 4294967296))), 64#L693-3true, 98#true, 129#true, 58#L692-1true, thr1Thread1of3ForFork0InUse, 126#(and (= ~c~0 1) (= (* 4294967296 (div (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|) 4294967296)) (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|))), thr1Thread2of3ForFork0InUse, 121#(and (= thr1Thread2of3ForFork0_~arg.base 0) (= |thr1Thread2of3ForFork0_#in~arg.offset| 0) (= |thr1Thread2of3ForFork0_#in~arg.base| 0) (= thr1Thread2of3ForFork0_~arg.offset 0))]) [2024-02-05 10:27:33,781 INFO L294 olderBase$Statistics]: this new event has 34 ancestors and is cut-off event [2024-02-05 10:27:33,781 INFO L297 olderBase$Statistics]: existing Event has 34 ancestors and is cut-off event [2024-02-05 10:27:33,781 INFO L297 olderBase$Statistics]: existing Event has 34 ancestors and is cut-off event [2024-02-05 10:27:33,781 INFO L297 olderBase$Statistics]: existing Event has 34 ancestors and is cut-off event [2024-02-05 10:27:33,786 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([400] L693-7-->L694: Formula: (and (= v_~c~0_30 0) (= (mod (+ v_thr1Thread3of3ForFork0_~arg.base_17 v_thr1Thread3of3ForFork0_~arg.offset_17) 4294967296) 0) (= (mod v_~c~0_31 4294967296) 1)) InVars {thr1Thread3of3ForFork0_~arg.offset=v_thr1Thread3of3ForFork0_~arg.offset_17, thr1Thread3of3ForFork0_~arg.base=v_thr1Thread3of3ForFork0_~arg.base_17, ~c~0=v_~c~0_31} OutVars{thr1Thread3of3ForFork0_~arg.offset=v_thr1Thread3of3ForFork0_~arg.offset_17, thr1Thread3of3ForFork0_~arg.base=v_thr1Thread3of3ForFork0_~arg.base_17, ~c~0=v_~c~0_30} AuxVars[] AssignedVars[~c~0][150], [thr1Thread3of3ForFork0InUse, 37#L693-4true, Black: 132#(and (= ~c~0 0) (= (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) (* (div (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) 4294967296) 4294967296))), 137#(= (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) (* (div (+ thr1Thread1of3ForFork0_~arg.base thr1Thread1of3ForFork0_~arg.offset) 4294967296) 4294967296)), 131#(= ~c~0 0), 108#(and (= thr1Thread1of3ForFork0_~arg.offset 0) (= thr1Thread1of3ForFork0_~arg.base 0) (= |thr1Thread1of3ForFork0_#in~arg.offset| 0) (= |thr1Thread1of3ForFork0_#in~arg.base| 0)), 52#L694true, 125#(= (* 4294967296 (div (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|) 4294967296)) (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|)), 17#L693-2true, Black: 113#(and (= ~c~0 0) (= (* 4294967296 (div (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|) 4294967296)) (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|))), 112#(= ~c~0 0), 98#true, 58#L692-1true, thr1Thread1of3ForFork0InUse, thr1Thread2of3ForFork0InUse, 121#(and (= thr1Thread2of3ForFork0_~arg.base 0) (= |thr1Thread2of3ForFork0_#in~arg.offset| 0) (= |thr1Thread2of3ForFork0_#in~arg.base| 0) (= thr1Thread2of3ForFork0_~arg.offset 0)), Black: 126#(and (= ~c~0 1) (= (* 4294967296 (div (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|) 4294967296)) (+ |ULTIMATE.start_thr1_~arg#1.offset| |ULTIMATE.start_thr1_~arg#1.base|)))]) [2024-02-05 10:27:33,786 INFO L294 olderBase$Statistics]: this new event has 34 ancestors and is cut-off event [2024-02-05 10:27:33,786 INFO L297 olderBase$Statistics]: existing Event has 34 ancestors and is cut-off event [2024-02-05 10:27:33,786 INFO L297 olderBase$Statistics]: existing Event has 34 ancestors and is cut-off event [2024-02-05 10:27:33,786 INFO L297 olderBase$Statistics]: existing Event has 34 ancestors and is cut-off event