./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-2.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/stack_longer-2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/stack_longer-2.i ./goblint.2024-06-19_11-23-25.files/protection/stack_longer-2.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-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:47:08,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:47:08,176 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:47:08,181 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:47:08,182 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:47:08,206 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:47:08,207 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:47:08,207 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:47:08,208 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:47:08,211 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:47:08,211 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:47:08,211 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:47:08,212 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:47:08,213 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:47:08,214 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:47:08,214 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:47:08,214 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:47:08,214 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:47:08,215 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:47:08,216 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:47:08,216 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:47:08,216 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:47:08,217 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:47:08,217 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:47:08,217 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:47:08,217 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:47:08,217 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:47:08,218 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:47:08,218 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:47:08,219 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:47:08,219 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:47:08,220 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:47:08,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:47:08,220 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:47:08,220 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:47:08,220 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:47:08,221 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:47:08,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:47:08,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:47:08,221 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:47:08,221 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:47:08,222 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:47:08,222 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:47:08,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:47:08,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:47:08,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:47:08,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:47:08,470 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:47:08,471 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:47:08,472 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/stack_longer-2.yml/witness.yml [2024-06-27 17:47:08,556 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:47:08,556 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:47:08,557 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2024-06-27 17:47:09,549 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:47:09,795 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:47:09,797 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2024-06-27 17:47:09,815 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85084aec7/b0b8091284154a1096051e7be9cf89c5/FLAGae99dfe40 [2024-06-27 17:47:09,829 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85084aec7/b0b8091284154a1096051e7be9cf89c5 [2024-06-27 17:47:09,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:47:09,830 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:47:09,832 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:47:09,833 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:47:09,836 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:47:09,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:47:08" (1/2) ... [2024-06-27 17:47:09,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3396cae1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:09, skipping insertion in model container [2024-06-27 17:47:09,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:47:08" (1/2) ... [2024-06-27 17:47:09,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3a7162e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:47:09, skipping insertion in model container [2024-06-27 17:47:09,841 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:47:09" (2/2) ... [2024-06-27 17:47:09,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3396cae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:09, skipping insertion in model container [2024-06-27 17:47:09,841 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:47:09" (2/2) ... [2024-06-27 17:47:09,842 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:47:09,870 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:47:09,872 INFO L97 edCorrectnessWitness]: Location invariant before [L1022-L1022] ! multithreaded || flag == (_Bool)0 [2024-06-27 17:47:09,872 INFO L97 edCorrectnessWitness]: Location invariant before [L1023-L1023] ! multithreaded || flag == (_Bool)0 [2024-06-27 17:47:09,872 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-27 17:47:09,872 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:47:09,872 INFO L106 edCorrectnessWitness]: ghost_update [L993-L993] m_locked = 1; [2024-06-27 17:47:09,873 INFO L106 edCorrectnessWitness]: ghost_update [L998-L998] m_locked = 0; [2024-06-27 17:47:09,873 INFO L106 edCorrectnessWitness]: ghost_update [L1013-L1013] m_locked = 0; [2024-06-27 17:47:09,873 INFO L106 edCorrectnessWitness]: ghost_update [L1007-L1007] m_locked = 1; [2024-06-27 17:47:09,873 INFO L106 edCorrectnessWitness]: ghost_update [L1021-L1021] multithreaded = 1; [2024-06-27 17:47:09,908 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:47:10,262 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i[41529,41542] [2024-06-27 17:47:10,295 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:47:10,304 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local [2024-06-27 17:47:10,361 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i[41529,41542] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:47:10,408 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:47:10,456 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:47:10,457 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10 WrapperNode [2024-06-27 17:47:10,457 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:47:10,458 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:47:10,459 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:47:10,459 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:47:10,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,521 INFO L138 Inliner]: procedures = 277, calls = 30, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 156 [2024-06-27 17:47:10,522 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:47:10,522 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:47:10,523 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:47:10,523 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:47:10,531 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,546 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,562 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 5, 3]. 50 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-06-27 17:47:10,565 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,579 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,583 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,584 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,585 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,587 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:47:10,587 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:47:10,588 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:47:10,588 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:47:10,589 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (1/1) ... [2024-06-27 17:47:10,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:47:10,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:10,620 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) [2024-06-27 17:47:10,624 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 [2024-06-27 17:47:10,646 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-27 17:47:10,646 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-27 17:47:10,646 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-27 17:47:10,647 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-27 17:47:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 17:47:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:47:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:47:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 17:47:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:47:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:47:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 17:47:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 17:47:10,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:47:10,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:47:10,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:47:10,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 17:47:10,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:47:10,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:47:10,649 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:47:10,758 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:47:10,760 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:47:10,959 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:47:10,959 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:47:11,152 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:47:11,152 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 17:47:11,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:47:11 BoogieIcfgContainer [2024-06-27 17:47:11,153 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:47:11,154 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:47:11,154 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:47:11,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:47:11,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:47:08" (1/4) ... [2024-06-27 17:47:11,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e74fe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:47:11, skipping insertion in model container [2024-06-27 17:47:11,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:47:09" (2/4) ... [2024-06-27 17:47:11,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e74fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:47:11, skipping insertion in model container [2024-06-27 17:47:11,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:47:10" (3/4) ... [2024-06-27 17:47:11,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e74fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:47:11, skipping insertion in model container [2024-06-27 17:47:11,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:47:11" (4/4) ... [2024-06-27 17:47:11,159 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2024-06-27 17:47:11,173 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:47:11,173 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:47:11,173 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:47:11,267 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:47:11,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 39 transitions, 92 flow [2024-06-27 17:47:11,326 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2024-06-27 17:47:11,326 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:47:11,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 37 events. 5/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 72 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-06-27 17:47:11,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 39 transitions, 92 flow [2024-06-27 17:47:11,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 35 transitions, 79 flow [2024-06-27 17:47:11,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:47:11,345 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;@4321a955, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:47:11,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 17:47:11,352 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:47:11,352 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-27 17:47:11,353 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:47:11,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:11,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:47:11,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:11,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:11,358 INFO L85 PathProgramCache]: Analyzing trace with hash 395559015, now seen corresponding path program 1 times [2024-06-27 17:47:11,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:11,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468163694] [2024-06-27 17:47:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:11,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:11,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:11,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468163694] [2024-06-27 17:47:11,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468163694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:11,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:11,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:47:11,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212230825] [2024-06-27 17:47:11,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:11,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:47:11,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:11,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:47:11,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:47:11,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-27 17:47:11,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-06-27 17:47:11,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:11,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-27 17:47:11,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:11,817 INFO L124 PetriNetUnfolderBase]: 234/458 cut-off events. [2024-06-27 17:47:11,818 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-27 17:47:11,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 458 events. 234/458 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2106 event pairs, 181 based on Foata normal form. 100/502 useless extension candidates. Maximal degree in co-relation 825. Up to 391 conditions per place. [2024-06-27 17:47:11,825 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 22 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2024-06-27 17:47:11,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 117 flow [2024-06-27 17:47:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:47:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:47:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-06-27 17:47:11,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-27 17:47:11,836 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 79 flow. Second operand 3 states and 57 transitions. [2024-06-27 17:47:11,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 117 flow [2024-06-27 17:47:11,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:47:11,842 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 68 flow [2024-06-27 17:47:11,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2024-06-27 17:47:11,847 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2024-06-27 17:47:11,847 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 68 flow [2024-06-27 17:47:11,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-06-27 17:47:11,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:11,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:11,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:47:11,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:11,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:11,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1336367533, now seen corresponding path program 1 times [2024-06-27 17:47:11,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:11,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223861484] [2024-06-27 17:47:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:11,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:12,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:12,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223861484] [2024-06-27 17:47:12,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223861484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:12,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:12,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:47:12,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040152793] [2024-06-27 17:47:12,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:12,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:47:12,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:12,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:47:12,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:47:12,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 17:47:12,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2024-06-27 17:47:12,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:12,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 17:47:12,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:12,117 INFO L124 PetriNetUnfolderBase]: 319/608 cut-off events. [2024-06-27 17:47:12,117 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 17:47:12,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 608 events. 319/608 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2769 event pairs, 56 based on Foata normal form. 5/566 useless extension candidates. Maximal degree in co-relation 1168. Up to 373 conditions per place. [2024-06-27 17:47:12,120 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 44 selfloop transitions, 3 changer transitions 2/57 dead transitions. [2024-06-27 17:47:12,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 223 flow [2024-06-27 17:47:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:47:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:47:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-27 17:47:12,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-27 17:47:12,122 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 68 flow. Second operand 4 states and 99 transitions. [2024-06-27 17:47:12,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 223 flow [2024-06-27 17:47:12,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:47:12,130 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 89 flow [2024-06-27 17:47:12,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2024-06-27 17:47:12,130 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-06-27 17:47:12,131 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 89 flow [2024-06-27 17:47:12,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2024-06-27 17:47:12,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:12,131 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:12,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:47:12,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:12,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:12,134 INFO L85 PathProgramCache]: Analyzing trace with hash 241249134, now seen corresponding path program 1 times [2024-06-27 17:47:12,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:12,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120643110] [2024-06-27 17:47:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:12,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:12,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:12,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120643110] [2024-06-27 17:47:12,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120643110] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:12,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200153169] [2024-06-27 17:47:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:12,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:12,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:12,313 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:12,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:47:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:12,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 17:47:12,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:12,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:12,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:12,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200153169] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:12,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:12,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-06-27 17:47:12,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268602654] [2024-06-27 17:47:12,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:12,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:47:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:12,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:47:12,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:47:12,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:12,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 89 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-27 17:47:12,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:12,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:12,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:13,181 INFO L124 PetriNetUnfolderBase]: 1287/2415 cut-off events. [2024-06-27 17:47:13,182 INFO L125 PetriNetUnfolderBase]: For 302/304 co-relation queries the response was YES. [2024-06-27 17:47:13,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5077 conditions, 2415 events. 1287/2415 cut-off events. For 302/304 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 13155 event pairs, 156 based on Foata normal form. 48/2353 useless extension candidates. Maximal degree in co-relation 5068. Up to 380 conditions per place. [2024-06-27 17:47:13,194 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 172 selfloop transitions, 32 changer transitions 4/215 dead transitions. [2024-06-27 17:47:13,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 215 transitions, 941 flow [2024-06-27 17:47:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 17:47:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 17:47:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 382 transitions. [2024-06-27 17:47:13,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652991452991453 [2024-06-27 17:47:13,197 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 89 flow. Second operand 15 states and 382 transitions. [2024-06-27 17:47:13,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 215 transitions, 941 flow [2024-06-27 17:47:13,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 215 transitions, 937 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:47:13,201 INFO L231 Difference]: Finished difference. Result has 58 places, 69 transitions, 336 flow [2024-06-27 17:47:13,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=336, PETRI_PLACES=58, PETRI_TRANSITIONS=69} [2024-06-27 17:47:13,202 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2024-06-27 17:47:13,202 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 69 transitions, 336 flow [2024-06-27 17:47:13,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 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) [2024-06-27 17:47:13,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:13,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:13,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 17:47:13,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:13,414 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:13,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:13,415 INFO L85 PathProgramCache]: Analyzing trace with hash 787342927, now seen corresponding path program 1 times [2024-06-27 17:47:13,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:13,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938672246] [2024-06-27 17:47:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:13,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:13,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:13,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938672246] [2024-06-27 17:47:13,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938672246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:13,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:13,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:47:13,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419493730] [2024-06-27 17:47:13,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:13,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:47:13,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:13,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:47:13,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:47:13,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 17:47:13,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 69 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-06-27 17:47:13,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:13,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 17:47:13,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:13,632 INFO L124 PetriNetUnfolderBase]: 699/1432 cut-off events. [2024-06-27 17:47:13,632 INFO L125 PetriNetUnfolderBase]: For 648/648 co-relation queries the response was YES. [2024-06-27 17:47:13,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3237 conditions, 1432 events. 699/1432 cut-off events. For 648/648 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7506 event pairs, 245 based on Foata normal form. 66/1478 useless extension candidates. Maximal degree in co-relation 3220. Up to 665 conditions per place. [2024-06-27 17:47:13,640 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 45 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-06-27 17:47:13,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 352 flow [2024-06-27 17:47:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:47:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:47:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 17:47:13,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 17:47:13,641 INFO L175 Difference]: Start difference. First operand has 58 places, 69 transitions, 336 flow. Second operand 3 states and 72 transitions. [2024-06-27 17:47:13,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 352 flow [2024-06-27 17:47:13,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 320 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 17:47:13,647 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 205 flow [2024-06-27 17:47:13,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-06-27 17:47:13,648 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2024-06-27 17:47:13,648 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 205 flow [2024-06-27 17:47:13,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-06-27 17:47:13,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:13,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:13,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:47:13,649 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:13,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:13,649 INFO L85 PathProgramCache]: Analyzing trace with hash -534083844, now seen corresponding path program 1 times [2024-06-27 17:47:13,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:13,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503832092] [2024-06-27 17:47:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:13,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:13,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:13,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503832092] [2024-06-27 17:47:13,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503832092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:47:13,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:47:13,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:47:13,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475160660] [2024-06-27 17:47:13,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:47:13,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:47:13,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:13,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:47:13,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:47:13,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 17:47:13,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-06-27 17:47:13,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:13,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 17:47:13,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:14,176 INFO L124 PetriNetUnfolderBase]: 863/1759 cut-off events. [2024-06-27 17:47:14,177 INFO L125 PetriNetUnfolderBase]: For 608/608 co-relation queries the response was YES. [2024-06-27 17:47:14,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4002 conditions, 1759 events. 863/1759 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9412 event pairs, 258 based on Foata normal form. 0/1734 useless extension candidates. Maximal degree in co-relation 3987. Up to 1018 conditions per place. [2024-06-27 17:47:14,185 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 61 selfloop transitions, 7 changer transitions 5/87 dead transitions. [2024-06-27 17:47:14,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 87 transitions, 455 flow [2024-06-27 17:47:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:47:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:47:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 17:47:14,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6102564102564103 [2024-06-27 17:47:14,187 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 205 flow. Second operand 5 states and 119 transitions. [2024-06-27 17:47:14,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 87 transitions, 455 flow [2024-06-27 17:47:14,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 444 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:47:14,191 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 258 flow [2024-06-27 17:47:14,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-27 17:47:14,191 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 22 predicate places. [2024-06-27 17:47:14,192 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 258 flow [2024-06-27 17:47:14,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-06-27 17:47:14,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:14,192 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:14,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:47:14,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:14,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:14,193 INFO L85 PathProgramCache]: Analyzing trace with hash 32469701, now seen corresponding path program 1 times [2024-06-27 17:47:14,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:14,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795394860] [2024-06-27 17:47:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:14,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:14,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:14,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795394860] [2024-06-27 17:47:14,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795394860] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:14,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358891502] [2024-06-27 17:47:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:14,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:14,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:14,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:14,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:47:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:14,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 17:47:14,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:14,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:14,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-06-27 17:47:14,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-06-27 17:47:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:14,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:15,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-06-27 17:47:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:15,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358891502] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:15,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:15,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-06-27 17:47:15,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129482162] [2024-06-27 17:47:15,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:15,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:47:15,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:15,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:47:15,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:47:15,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:15,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 258 flow. Second operand has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 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) [2024-06-27 17:47:15,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:15,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:15,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:15,786 INFO L124 PetriNetUnfolderBase]: 1366/2702 cut-off events. [2024-06-27 17:47:15,786 INFO L125 PetriNetUnfolderBase]: For 1240/1240 co-relation queries the response was YES. [2024-06-27 17:47:15,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6160 conditions, 2702 events. 1366/2702 cut-off events. For 1240/1240 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 14993 event pairs, 168 based on Foata normal form. 0/2645 useless extension candidates. Maximal degree in co-relation 6141. Up to 416 conditions per place. [2024-06-27 17:47:15,799 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 177 selfloop transitions, 37 changer transitions 20/241 dead transitions. [2024-06-27 17:47:15,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 241 transitions, 1250 flow [2024-06-27 17:47:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 17:47:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 17:47:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 439 transitions. [2024-06-27 17:47:15,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5924426450742241 [2024-06-27 17:47:15,801 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 258 flow. Second operand 19 states and 439 transitions. [2024-06-27 17:47:15,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 241 transitions, 1250 flow [2024-06-27 17:47:15,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 241 transitions, 1242 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 17:47:15,808 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 436 flow [2024-06-27 17:47:15,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=436, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2024-06-27 17:47:15,809 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 43 predicate places. [2024-06-27 17:47:15,809 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 436 flow [2024-06-27 17:47:15,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 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) [2024-06-27 17:47:15,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:15,810 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:15,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 17:47:16,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 17:47:16,022 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:16,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1894931646, now seen corresponding path program 1 times [2024-06-27 17:47:16,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:16,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409895292] [2024-06-27 17:47:16,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:16,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:47:16,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:16,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409895292] [2024-06-27 17:47:16,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409895292] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:16,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916429176] [2024-06-27 17:47:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:16,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:16,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:16,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:16,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 17:47:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:16,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:47:16,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:16,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:16,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:16,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:47:16,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916429176] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:16,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:16,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2024-06-27 17:47:16,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550545355] [2024-06-27 17:47:16,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:16,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:47:16,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:16,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:47:16,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:47:16,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:16,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 436 flow. Second operand has 12 states, 12 states have (on average 16.666666666666668) internal successors, (200), 12 states have internal predecessors, (200), 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) [2024-06-27 17:47:16,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:16,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:16,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:17,423 INFO L124 PetriNetUnfolderBase]: 2377/4689 cut-off events. [2024-06-27 17:47:17,424 INFO L125 PetriNetUnfolderBase]: For 3758/3758 co-relation queries the response was YES. [2024-06-27 17:47:17,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11234 conditions, 4689 events. 2377/4689 cut-off events. For 3758/3758 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 28832 event pairs, 293 based on Foata normal form. 42/4667 useless extension candidates. Maximal degree in co-relation 11210. Up to 746 conditions per place. [2024-06-27 17:47:17,443 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 192 selfloop transitions, 75 changer transitions 8/282 dead transitions. [2024-06-27 17:47:17,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 282 transitions, 1723 flow [2024-06-27 17:47:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 17:47:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 17:47:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 437 transitions. [2024-06-27 17:47:17,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-27 17:47:17,446 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 436 flow. Second operand 19 states and 437 transitions. [2024-06-27 17:47:17,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 282 transitions, 1723 flow [2024-06-27 17:47:17,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 282 transitions, 1684 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 17:47:17,463 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 891 flow [2024-06-27 17:47:17,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=891, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2024-06-27 17:47:17,464 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 62 predicate places. [2024-06-27 17:47:17,464 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 891 flow [2024-06-27 17:47:17,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.666666666666668) internal successors, (200), 12 states have internal predecessors, (200), 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) [2024-06-27 17:47:17,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:17,464 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:17,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 17:47:17,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:17,680 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:17,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:17,680 INFO L85 PathProgramCache]: Analyzing trace with hash 863564224, now seen corresponding path program 1 times [2024-06-27 17:47:17,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:17,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196760633] [2024-06-27 17:47:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:17,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:18,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:18,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196760633] [2024-06-27 17:47:18,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196760633] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:18,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86593961] [2024-06-27 17:47:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:18,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:18,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:18,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:18,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 17:47:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:18,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 17:47:18,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:18,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:47:18,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2024-06-27 17:47:18,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-06-27 17:47:19,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 43 [2024-06-27 17:47:19,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:19,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 57 [2024-06-27 17:47:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:19,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:19,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:19,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2024-06-27 17:47:19,992 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-06-27 17:47:19,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 63 [2024-06-27 17:47:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:20,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86593961] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:20,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:20,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-06-27 17:47:20,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709642793] [2024-06-27 17:47:20,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:20,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:47:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:47:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:47:20,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:20,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 891 flow. Second operand has 17 states, 17 states have (on average 15.235294117647058) internal successors, (259), 17 states have internal predecessors, (259), 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) [2024-06-27 17:47:20,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:20,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:20,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:22,639 INFO L124 PetriNetUnfolderBase]: 3610/7075 cut-off events. [2024-06-27 17:47:22,639 INFO L125 PetriNetUnfolderBase]: For 8929/8929 co-relation queries the response was YES. [2024-06-27 17:47:22,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17926 conditions, 7075 events. 3610/7075 cut-off events. For 8929/8929 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 45613 event pairs, 659 based on Foata normal form. 56/7046 useless extension candidates. Maximal degree in co-relation 17897. Up to 1154 conditions per place. [2024-06-27 17:47:22,686 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 250 selfloop transitions, 111 changer transitions 46/414 dead transitions. [2024-06-27 17:47:22,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 414 transitions, 2860 flow [2024-06-27 17:47:22,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 17:47:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 17:47:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 658 transitions. [2024-06-27 17:47:22,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5623931623931624 [2024-06-27 17:47:22,689 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 891 flow. Second operand 30 states and 658 transitions. [2024-06-27 17:47:22,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 414 transitions, 2860 flow [2024-06-27 17:47:22,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 414 transitions, 2750 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-27 17:47:22,730 INFO L231 Difference]: Finished difference. Result has 132 places, 160 transitions, 1487 flow [2024-06-27 17:47:22,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1487, PETRI_PLACES=132, PETRI_TRANSITIONS=160} [2024-06-27 17:47:22,732 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 95 predicate places. [2024-06-27 17:47:22,732 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 160 transitions, 1487 flow [2024-06-27 17:47:22,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.235294117647058) internal successors, (259), 17 states have internal predecessors, (259), 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) [2024-06-27 17:47:22,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:22,734 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:22,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 17:47:22,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:22,945 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:22,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash -444696257, now seen corresponding path program 2 times [2024-06-27 17:47:22,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:22,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57057523] [2024-06-27 17:47:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:22,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:23,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:23,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57057523] [2024-06-27 17:47:23,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57057523] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:23,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251467734] [2024-06-27 17:47:23,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:47:23,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:23,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:23,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:23,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 17:47:23,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:47:23,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:47:23,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:47:23,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:23,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:23,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:23,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:23,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:23,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:23,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251467734] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:23,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:23,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-06-27 17:47:23,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377798058] [2024-06-27 17:47:23,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:23,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:47:23,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:47:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:47:23,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:23,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 160 transitions, 1487 flow. Second operand has 19 states, 19 states have (on average 14.789473684210526) internal successors, (281), 19 states have internal predecessors, (281), 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) [2024-06-27 17:47:23,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:23,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:23,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:26,295 INFO L124 PetriNetUnfolderBase]: 10173/19939 cut-off events. [2024-06-27 17:47:26,296 INFO L125 PetriNetUnfolderBase]: For 39932/39932 co-relation queries the response was YES. [2024-06-27 17:47:26,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53917 conditions, 19939 events. 10173/19939 cut-off events. For 39932/39932 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 147671 event pairs, 2096 based on Foata normal form. 348/20174 useless extension candidates. Maximal degree in co-relation 53882. Up to 3288 conditions per place. [2024-06-27 17:47:26,408 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 490 selfloop transitions, 344 changer transitions 0/841 dead transitions. [2024-06-27 17:47:26,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 841 transitions, 7173 flow [2024-06-27 17:47:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-06-27 17:47:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-06-27 17:47:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 997 transitions. [2024-06-27 17:47:26,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945140131186643 [2024-06-27 17:47:26,412 INFO L175 Difference]: Start difference. First operand has 132 places, 160 transitions, 1487 flow. Second operand 43 states and 997 transitions. [2024-06-27 17:47:26,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 841 transitions, 7173 flow [2024-06-27 17:47:26,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 841 transitions, 6967 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-27 17:47:26,786 INFO L231 Difference]: Finished difference. Result has 184 places, 420 transitions, 4697 flow [2024-06-27 17:47:26,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=4697, PETRI_PLACES=184, PETRI_TRANSITIONS=420} [2024-06-27 17:47:26,787 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 147 predicate places. [2024-06-27 17:47:26,787 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 420 transitions, 4697 flow [2024-06-27 17:47:26,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.789473684210526) internal successors, (281), 19 states have internal predecessors, (281), 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) [2024-06-27 17:47:26,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:26,788 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:26,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-27 17:47:26,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:27,000 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:27,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:27,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1058384276, now seen corresponding path program 2 times [2024-06-27 17:47:27,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:27,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748719130] [2024-06-27 17:47:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:27,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:27,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:27,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748719130] [2024-06-27 17:47:27,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748719130] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:27,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029155036] [2024-06-27 17:47:27,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:47:27,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:27,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:27,787 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:27,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 17:47:27,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:47:27,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:47:27,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 17:47:27,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:27,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:47:27,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 50 [2024-06-27 17:47:28,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2024-06-27 17:47:28,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2024-06-27 17:47:28,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 95 [2024-06-27 17:47:28,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:28,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2024-06-27 17:47:28,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:28,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 69 [2024-06-27 17:47:29,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:47:29,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 227 treesize of output 107 [2024-06-27 17:47:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:29,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:30,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029155036] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:30,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:30,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2024-06-27 17:47:30,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808212144] [2024-06-27 17:47:30,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:30,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:47:30,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:30,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:47:30,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:47:30,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:30,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 420 transitions, 4697 flow. Second operand has 24 states, 24 states have (on average 14.708333333333334) internal successors, (353), 24 states have internal predecessors, (353), 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) [2024-06-27 17:47:30,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:30,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:30,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:47:43,401 INFO L124 PetriNetUnfolderBase]: 36239/69817 cut-off events. [2024-06-27 17:47:43,401 INFO L125 PetriNetUnfolderBase]: For 239182/239182 co-relation queries the response was YES. [2024-06-27 17:47:43,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206817 conditions, 69817 events. 36239/69817 cut-off events. For 239182/239182 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 620708 event pairs, 5639 based on Foata normal form. 693/69970 useless extension candidates. Maximal degree in co-relation 206765. Up to 11865 conditions per place. [2024-06-27 17:47:44,089 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 908 selfloop transitions, 1031 changer transitions 36/1982 dead transitions. [2024-06-27 17:47:44,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 1982 transitions, 23503 flow [2024-06-27 17:47:44,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-06-27 17:47:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2024-06-27 17:47:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 1218 transitions. [2024-06-27 17:47:44,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529335071707953 [2024-06-27 17:47:44,092 INFO L175 Difference]: Start difference. First operand has 184 places, 420 transitions, 4697 flow. Second operand 59 states and 1218 transitions. [2024-06-27 17:47:44,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 1982 transitions, 23503 flow [2024-06-27 17:47:46,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1982 transitions, 22041 flow, removed 680 selfloop flow, removed 1 redundant places. [2024-06-27 17:47:46,780 INFO L231 Difference]: Finished difference. Result has 286 places, 1288 transitions, 17880 flow [2024-06-27 17:47:46,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4385, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=17880, PETRI_PLACES=286, PETRI_TRANSITIONS=1288} [2024-06-27 17:47:46,781 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 249 predicate places. [2024-06-27 17:47:46,781 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 1288 transitions, 17880 flow [2024-06-27 17:47:46,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.708333333333334) internal successors, (353), 24 states have internal predecessors, (353), 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) [2024-06-27 17:47:46,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:47:46,782 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:47:46,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-06-27 17:47:46,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:46,982 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-27 17:47:46,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:47:46,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1976751234, now seen corresponding path program 1 times [2024-06-27 17:47:46,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:47:46,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685192236] [2024-06-27 17:47:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:46,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:47:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:47:47,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:47:47,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685192236] [2024-06-27 17:47:47,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685192236] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:47:47,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020477617] [2024-06-27 17:47:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:47:47,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:47:47,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:47:47,322 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:47:47,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 17:47:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:47:47,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 17:47:47,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:47:47,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:47,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:47,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:47,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:47,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:47:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:47:47,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:47:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 45 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-06-27 17:47:47,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020477617] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:47:47,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:47:47,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 20 [2024-06-27 17:47:47,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987750043] [2024-06-27 17:47:47,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:47:47,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 17:47:47,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:47:47,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 17:47:47,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2024-06-27 17:47:47,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 17:47:47,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 1288 transitions, 17880 flow. Second operand has 20 states, 20 states have (on average 16.9) internal successors, (338), 20 states have internal predecessors, (338), 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) [2024-06-27 17:47:47,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:47:47,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 17:47:47,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand