./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/mutex-meet-nonrel/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/mutex-meet-nonrel/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 [2024-06-28 00:50:25,023 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:50:25,085 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:50:25,089 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:50:25,089 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:50:25,122 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:50:25,123 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:50:25,124 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:50:25,124 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:50:25,127 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:50:25,128 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:50:25,128 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:50:25,128 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:50:25,129 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:50:25,129 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:50:25,130 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:50:25,130 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:50:25,130 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:50:25,130 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:50:25,130 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:50:25,131 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:50:25,131 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:50:25,131 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:50:25,131 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:50:25,132 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:50:25,132 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:50:25,132 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:50:25,132 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:50:25,133 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:50:25,133 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:50:25,134 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:50:25,134 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:50:25,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:50:25,134 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:50:25,135 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:50:25,135 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:50:25,135 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:50:25,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:50:25,135 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:50:25,135 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:50:25,136 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:50:25,136 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:50:25,136 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:50:25,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 00:50:25,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:50:25,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:50:25,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:50:25,435 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:50:25,435 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:50:25,436 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/stack_longer-2.yml/witness.yml [2024-06-28 00:50:25,522 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:50:25,522 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:50:25,523 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2024-06-28 00:50:26,437 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:50:26,652 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:50:26,653 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2024-06-28 00:50:26,685 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/235bb44ec/7358734ecb3844ffacd810705ab32827/FLAGd9cc16c0d [2024-06-28 00:50:26,696 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/235bb44ec/7358734ecb3844ffacd810705ab32827 [2024-06-28 00:50:26,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:50:26,700 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:50:26,701 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:50:26,703 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:50:26,706 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:50:26,707 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:50:25" (1/2) ... [2024-06-28 00:50:26,708 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15e10793 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:26, skipping insertion in model container [2024-06-28 00:50:26,708 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:50:25" (1/2) ... [2024-06-28 00:50:26,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@45015a50 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:50:26, skipping insertion in model container [2024-06-28 00:50:26,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:50:26" (2/2) ... [2024-06-28 00:50:26,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15e10793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:26, skipping insertion in model container [2024-06-28 00:50:26,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:50:26" (2/2) ... [2024-06-28 00:50:26,711 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:50:26,742 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:50:26,743 INFO L97 edCorrectnessWitness]: Location invariant before [L1022-L1022] (! multithreaded || (m_locked || flag == (_Bool)0)) && (! multithreaded || flag == (_Bool)0) [2024-06-28 00:50:26,743 INFO L97 edCorrectnessWitness]: Location invariant before [L1023-L1023] (! multithreaded || (m_locked || flag == (_Bool)0)) && (! multithreaded || flag == (_Bool)0) [2024-06-28 00:50:26,743 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:50:26,743 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-28 00:50:26,744 INFO L106 edCorrectnessWitness]: ghost_update [L993-L993] m_locked = 1; [2024-06-28 00:50:26,744 INFO L106 edCorrectnessWitness]: ghost_update [L1013-L1013] m_locked = 0; [2024-06-28 00:50:26,744 INFO L106 edCorrectnessWitness]: ghost_update [L1007-L1007] m_locked = 1; [2024-06-28 00:50:26,744 INFO L106 edCorrectnessWitness]: ghost_update [L1021-L1021] multithreaded = 1; [2024-06-28 00:50:26,744 INFO L106 edCorrectnessWitness]: ghost_update [L998-L998] m_locked = 0; [2024-06-28 00:50:26,784 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:50:27,110 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] [2024-06-28 00:50:27,142 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:50:27,152 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local [2024-06-28 00:50:27,216 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 [2024-06-28 00:50:27,227 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:50:27,266 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:50:27,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27 WrapperNode [2024-06-28 00:50:27,267 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:50:27,268 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:50:27,268 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:50:27,268 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:50:27,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,285 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,306 INFO L138 Inliner]: procedures = 277, calls = 30, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 156 [2024-06-28 00:50:27,307 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:50:27,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:50:27,307 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:50:27,307 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:50:27,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,318 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,331 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]. [2024-06-28 00:50:27,332 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,332 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,338 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,369 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,392 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,408 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:50:27,409 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:50:27,409 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:50:27,409 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:50:27,410 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (1/1) ... [2024-06-28 00:50:27,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:50:27,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:27,435 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) [2024-06-28 00:50:27,437 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 [2024-06-28 00:50:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-28 00:50:27,461 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-28 00:50:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-28 00:50:27,461 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-28 00:50:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-28 00:50:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 00:50:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 00:50:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-28 00:50:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 00:50:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 00:50:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-28 00:50:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-28 00:50:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:50:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:50:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 00:50:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-28 00:50:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:50:27,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:50:27,465 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:50:27,585 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:50:27,587 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:50:27,796 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:50:27,796 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:50:27,961 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:50:27,961 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-28 00:50:27,962 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:50:27 BoogieIcfgContainer [2024-06-28 00:50:27,962 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:50:27,965 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:50:27,965 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:50:27,967 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:50:27,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:50:25" (1/4) ... [2024-06-28 00:50:27,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f50900c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:50:27, skipping insertion in model container [2024-06-28 00:50:27,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:50:26" (2/4) ... [2024-06-28 00:50:27,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f50900c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:50:27, skipping insertion in model container [2024-06-28 00:50:27,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:50:27" (3/4) ... [2024-06-28 00:50:27,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f50900c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:50:27, skipping insertion in model container [2024-06-28 00:50:27,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:50:27" (4/4) ... [2024-06-28 00:50:27,971 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2024-06-28 00:50:27,984 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:50:27,984 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 00:50:27,984 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:50:28,046 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-28 00:50:28,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 39 transitions, 92 flow [2024-06-28 00:50:28,105 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2024-06-28 00:50:28,106 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-28 00:50:28,109 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. [2024-06-28 00:50:28,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 39 transitions, 92 flow [2024-06-28 00:50:28,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 35 transitions, 79 flow [2024-06-28 00:50:28,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:50:28,132 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;@489ff96f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:50:28,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 00:50:28,135 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:50:28,135 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-28 00:50:28,135 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:50:28,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:28,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:50:28,137 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)] === [2024-06-28 00:50:28,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:28,140 INFO L85 PathProgramCache]: Analyzing trace with hash 395559015, now seen corresponding path program 1 times [2024-06-28 00:50:28,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:28,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050910538] [2024-06-28 00:50:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:28,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:28,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:28,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050910538] [2024-06-28 00:50:28,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050910538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:28,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:28,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:50:28,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771464891] [2024-06-28 00:50:28,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:28,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:50:28,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:28,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:50:28,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:50:28,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-28 00:50:28,440 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) [2024-06-28 00:50:28,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:28,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-28 00:50:28,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:28,596 INFO L124 PetriNetUnfolderBase]: 234/458 cut-off events. [2024-06-28 00:50:28,597 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-28 00:50:28,598 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. [2024-06-28 00:50:28,601 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 22 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2024-06-28 00:50:28,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 117 flow [2024-06-28 00:50:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:50:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:50:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-06-28 00:50:28,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-28 00:50:28,613 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 79 flow. Second operand 3 states and 57 transitions. [2024-06-28 00:50:28,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 117 flow [2024-06-28 00:50:28,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:50:28,620 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 68 flow [2024-06-28 00:50:28,622 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} [2024-06-28 00:50:28,626 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2024-06-28 00:50:28,626 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 68 flow [2024-06-28 00:50:28,626 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) [2024-06-28 00:50:28,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:28,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:28,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:50:28,627 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)] === [2024-06-28 00:50:28,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:28,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1336367533, now seen corresponding path program 1 times [2024-06-28 00:50:28,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:28,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589056348] [2024-06-28 00:50:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:28,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:28,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589056348] [2024-06-28 00:50:28,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589056348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:28,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:28,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:50:28,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407071979] [2024-06-28 00:50:28,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:28,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:50:28,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:50:28,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:50:28,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 00:50:28,795 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) [2024-06-28 00:50:28,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:28,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 00:50:28,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:28,943 INFO L124 PetriNetUnfolderBase]: 319/608 cut-off events. [2024-06-28 00:50:28,943 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-28 00:50:28,946 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. [2024-06-28 00:50:28,949 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 44 selfloop transitions, 3 changer transitions 2/57 dead transitions. [2024-06-28 00:50:28,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 223 flow [2024-06-28 00:50:28,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:50:28,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:50:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-28 00:50:28,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-28 00:50:28,955 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 68 flow. Second operand 4 states and 99 transitions. [2024-06-28 00:50:28,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 223 flow [2024-06-28 00:50:28,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:50:28,961 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 89 flow [2024-06-28 00:50:28,961 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} [2024-06-28 00:50:28,962 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-06-28 00:50:28,962 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 89 flow [2024-06-28 00:50:28,962 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) [2024-06-28 00:50:28,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:28,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:28,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:50:28,963 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)] === [2024-06-28 00:50:28,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash 241249134, now seen corresponding path program 1 times [2024-06-28 00:50:28,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:28,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082063636] [2024-06-28 00:50:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:28,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:29,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:29,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082063636] [2024-06-28 00:50:29,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082063636] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:29,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110787848] [2024-06-28 00:50:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:29,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:29,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:29,139 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) [2024-06-28 00:50:29,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-28 00:50:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:29,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-28 00:50:29,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:29,326 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 [2024-06-28 00:50:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:29,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:29,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110787848] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:29,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:29,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-06-28 00:50:29,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492196423] [2024-06-28 00:50:29,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:29,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:50:29,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:50:29,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:50:29,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:29,565 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) [2024-06-28 00:50:29,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:29,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:29,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:29,988 INFO L124 PetriNetUnfolderBase]: 1287/2415 cut-off events. [2024-06-28 00:50:29,989 INFO L125 PetriNetUnfolderBase]: For 302/304 co-relation queries the response was YES. [2024-06-28 00:50:29,991 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. [2024-06-28 00:50:29,998 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 172 selfloop transitions, 32 changer transitions 4/215 dead transitions. [2024-06-28 00:50:29,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 215 transitions, 941 flow [2024-06-28 00:50:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 00:50:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 00:50:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 382 transitions. [2024-06-28 00:50:30,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652991452991453 [2024-06-28 00:50:30,002 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 89 flow. Second operand 15 states and 382 transitions. [2024-06-28 00:50:30,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 215 transitions, 941 flow [2024-06-28 00:50:30,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 215 transitions, 937 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:50:30,008 INFO L231 Difference]: Finished difference. Result has 58 places, 69 transitions, 336 flow [2024-06-28 00:50:30,008 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} [2024-06-28 00:50:30,009 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2024-06-28 00:50:30,009 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 69 transitions, 336 flow [2024-06-28 00:50:30,009 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) [2024-06-28 00:50:30,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:30,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:30,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:30,222 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 [2024-06-28 00:50:30,223 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)] === [2024-06-28 00:50:30,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 787342927, now seen corresponding path program 1 times [2024-06-28 00:50:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:30,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49778523] [2024-06-28 00:50:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:30,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:30,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:30,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49778523] [2024-06-28 00:50:30,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49778523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:30,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:30,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:50:30,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368894646] [2024-06-28 00:50:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:30,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:50:30,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:50:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:50:30,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 00:50:30,277 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) [2024-06-28 00:50:30,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:30,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 00:50:30,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:30,402 INFO L124 PetriNetUnfolderBase]: 699/1432 cut-off events. [2024-06-28 00:50:30,402 INFO L125 PetriNetUnfolderBase]: For 648/648 co-relation queries the response was YES. [2024-06-28 00:50:30,405 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. [2024-06-28 00:50:30,410 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 45 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-06-28 00:50:30,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 352 flow [2024-06-28 00:50:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:50:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:50:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-28 00:50:30,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-28 00:50:30,411 INFO L175 Difference]: Start difference. First operand has 58 places, 69 transitions, 336 flow. Second operand 3 states and 72 transitions. [2024-06-28 00:50:30,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 352 flow [2024-06-28 00:50:30,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 320 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 00:50:30,416 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 205 flow [2024-06-28 00:50:30,417 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} [2024-06-28 00:50:30,417 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2024-06-28 00:50:30,417 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 205 flow [2024-06-28 00:50:30,418 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) [2024-06-28 00:50:30,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:30,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:30,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:50:30,418 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)] === [2024-06-28 00:50:30,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:30,419 INFO L85 PathProgramCache]: Analyzing trace with hash -534083844, now seen corresponding path program 1 times [2024-06-28 00:50:30,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:30,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621140597] [2024-06-28 00:50:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:30,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:30,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:30,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621140597] [2024-06-28 00:50:30,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621140597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:50:30,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:50:30,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:50:30,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006256596] [2024-06-28 00:50:30,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:50:30,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:50:30,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:30,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:50:30,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:50:30,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 00:50:30,679 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) [2024-06-28 00:50:30,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:30,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 00:50:30,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:30,900 INFO L124 PetriNetUnfolderBase]: 863/1759 cut-off events. [2024-06-28 00:50:30,901 INFO L125 PetriNetUnfolderBase]: For 608/608 co-relation queries the response was YES. [2024-06-28 00:50:30,904 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. [2024-06-28 00:50:30,909 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 61 selfloop transitions, 7 changer transitions 5/87 dead transitions. [2024-06-28 00:50:30,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 87 transitions, 455 flow [2024-06-28 00:50:30,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:50:30,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:50:30,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-28 00:50:30,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6102564102564103 [2024-06-28 00:50:30,911 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 205 flow. Second operand 5 states and 119 transitions. [2024-06-28 00:50:30,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 87 transitions, 455 flow [2024-06-28 00:50:30,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 444 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:50:30,915 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 258 flow [2024-06-28 00:50:30,915 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} [2024-06-28 00:50:30,915 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 22 predicate places. [2024-06-28 00:50:30,915 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 258 flow [2024-06-28 00:50:30,916 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) [2024-06-28 00:50:30,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:30,916 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] [2024-06-28 00:50:30,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:50:30,916 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)] === [2024-06-28 00:50:30,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:30,917 INFO L85 PathProgramCache]: Analyzing trace with hash 32469701, now seen corresponding path program 1 times [2024-06-28 00:50:30,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:30,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271202526] [2024-06-28 00:50:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:30,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:31,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:31,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271202526] [2024-06-28 00:50:31,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271202526] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:31,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943462747] [2024-06-28 00:50:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:31,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:31,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:31,215 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) [2024-06-28 00:50:31,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-28 00:50:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:31,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-28 00:50:31,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:31,354 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 [2024-06-28 00:50:31,418 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 [2024-06-28 00:50:31,496 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 [2024-06-28 00:50:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:31,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:31,743 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 [2024-06-28 00:50:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:31,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943462747] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:31,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:31,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-06-28 00:50:31,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955446840] [2024-06-28 00:50:31,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:31,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-28 00:50:31,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:31,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-28 00:50:31,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-06-28 00:50:31,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:31,786 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) [2024-06-28 00:50:31,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:31,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:31,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:32,449 INFO L124 PetriNetUnfolderBase]: 1366/2702 cut-off events. [2024-06-28 00:50:32,449 INFO L125 PetriNetUnfolderBase]: For 1240/1240 co-relation queries the response was YES. [2024-06-28 00:50:32,453 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. [2024-06-28 00:50:32,461 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 177 selfloop transitions, 37 changer transitions 20/241 dead transitions. [2024-06-28 00:50:32,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 241 transitions, 1250 flow [2024-06-28 00:50:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 00:50:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 00:50:32,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 439 transitions. [2024-06-28 00:50:32,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5924426450742241 [2024-06-28 00:50:32,464 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 258 flow. Second operand 19 states and 439 transitions. [2024-06-28 00:50:32,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 241 transitions, 1250 flow [2024-06-28 00:50:32,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 241 transitions, 1242 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-28 00:50:32,473 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 436 flow [2024-06-28 00:50:32,473 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} [2024-06-28 00:50:32,476 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 43 predicate places. [2024-06-28 00:50:32,476 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 436 flow [2024-06-28 00:50:32,476 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) [2024-06-28 00:50:32,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:32,476 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] [2024-06-28 00:50:32,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:32,688 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 [2024-06-28 00:50:32,689 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)] === [2024-06-28 00:50:32,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:32,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1894931646, now seen corresponding path program 1 times [2024-06-28 00:50:32,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:32,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135425685] [2024-06-28 00:50:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:32,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 00:50:32,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:32,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135425685] [2024-06-28 00:50:32,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135425685] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:32,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33367009] [2024-06-28 00:50:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:32,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:32,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:32,886 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) [2024-06-28 00:50:32,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-28 00:50:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:32,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 00:50:32,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:33,016 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 [2024-06-28 00:50:33,050 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 [2024-06-28 00:50:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:33,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 00:50:33,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33367009] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:33,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:33,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2024-06-28 00:50:33,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107719789] [2024-06-28 00:50:33,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:33,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 00:50:33,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:33,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 00:50:33,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-06-28 00:50:33,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:33,247 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) [2024-06-28 00:50:33,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:33,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:33,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:34,023 INFO L124 PetriNetUnfolderBase]: 2377/4689 cut-off events. [2024-06-28 00:50:34,023 INFO L125 PetriNetUnfolderBase]: For 3758/3758 co-relation queries the response was YES. [2024-06-28 00:50:34,030 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. [2024-06-28 00:50:34,042 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 192 selfloop transitions, 75 changer transitions 8/282 dead transitions. [2024-06-28 00:50:34,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 282 transitions, 1723 flow [2024-06-28 00:50:34,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 00:50:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 00:50:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 437 transitions. [2024-06-28 00:50:34,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-28 00:50:34,045 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 436 flow. Second operand 19 states and 437 transitions. [2024-06-28 00:50:34,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 282 transitions, 1723 flow [2024-06-28 00:50:34,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 282 transitions, 1684 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 00:50:34,061 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 891 flow [2024-06-28 00:50:34,061 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} [2024-06-28 00:50:34,062 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 62 predicate places. [2024-06-28 00:50:34,062 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 891 flow [2024-06-28 00:50:34,062 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) [2024-06-28 00:50:34,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:34,062 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] [2024-06-28 00:50:34,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:34,271 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 [2024-06-28 00:50:34,272 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)] === [2024-06-28 00:50:34,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash 863564224, now seen corresponding path program 1 times [2024-06-28 00:50:34,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:34,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234608538] [2024-06-28 00:50:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:34,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:34,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:34,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234608538] [2024-06-28 00:50:34,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234608538] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:34,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255929594] [2024-06-28 00:50:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:34,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:34,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:34,796 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) [2024-06-28 00:50:34,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-28 00:50:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:34,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-28 00:50:34,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:34,941 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 [2024-06-28 00:50:35,017 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 [2024-06-28 00:50:35,021 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 [2024-06-28 00:50:35,057 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 [2024-06-28 00:50:35,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:35,387 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 [2024-06-28 00:50:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:35,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:35,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:35,857 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 [2024-06-28 00:50:35,881 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-06-28 00:50:35,882 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 [2024-06-28 00:50:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:35,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255929594] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:35,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:35,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-06-28 00:50:35,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647375016] [2024-06-28 00:50:35,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:35,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-28 00:50:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-28 00:50:35,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2024-06-28 00:50:35,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:35,953 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) [2024-06-28 00:50:35,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:35,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:35,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:37,383 INFO L124 PetriNetUnfolderBase]: 2999/5902 cut-off events. [2024-06-28 00:50:37,383 INFO L125 PetriNetUnfolderBase]: For 7983/7983 co-relation queries the response was YES. [2024-06-28 00:50:37,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15094 conditions, 5902 events. 2999/5902 cut-off events. For 7983/7983 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 37193 event pairs, 460 based on Foata normal form. 77/5908 useless extension candidates. Maximal degree in co-relation 15065. Up to 962 conditions per place. [2024-06-28 00:50:37,421 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 208 selfloop transitions, 89 changer transitions 32/336 dead transitions. [2024-06-28 00:50:37,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 336 transitions, 2354 flow [2024-06-28 00:50:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-28 00:50:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-28 00:50:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 517 transitions. [2024-06-28 00:50:37,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5763656633221851 [2024-06-28 00:50:37,423 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 891 flow. Second operand 23 states and 517 transitions. [2024-06-28 00:50:37,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 336 transitions, 2354 flow [2024-06-28 00:50:37,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 336 transitions, 2252 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-28 00:50:37,455 INFO L231 Difference]: Finished difference. Result has 123 places, 138 transitions, 1250 flow [2024-06-28 00:50:37,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1250, PETRI_PLACES=123, PETRI_TRANSITIONS=138} [2024-06-28 00:50:37,457 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 86 predicate places. [2024-06-28 00:50:37,458 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 138 transitions, 1250 flow [2024-06-28 00:50:37,458 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) [2024-06-28 00:50:37,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:37,459 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-06-28 00:50:37,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:37,671 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 [2024-06-28 00:50:37,671 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)] === [2024-06-28 00:50:37,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash -444696257, now seen corresponding path program 2 times [2024-06-28 00:50:37,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:37,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39391788] [2024-06-28 00:50:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:37,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:37,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39391788] [2024-06-28 00:50:37,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39391788] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521785160] [2024-06-28 00:50:37,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 00:50:37,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:37,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:37,893 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) [2024-06-28 00:50:37,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-28 00:50:38,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 00:50:38,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:50:38,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-28 00:50:38,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:38,026 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 [2024-06-28 00:50:38,047 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 [2024-06-28 00:50:38,068 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 [2024-06-28 00:50:38,093 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 [2024-06-28 00:50:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:38,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:38,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521785160] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:38,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:38,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-06-28 00:50:38,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286165261] [2024-06-28 00:50:38,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:38,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-28 00:50:38,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:38,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-28 00:50:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2024-06-28 00:50:38,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:38,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 138 transitions, 1250 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) [2024-06-28 00:50:38,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:38,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:38,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:41,095 INFO L124 PetriNetUnfolderBase]: 9464/18520 cut-off events. [2024-06-28 00:50:41,096 INFO L125 PetriNetUnfolderBase]: For 34154/34154 co-relation queries the response was YES. [2024-06-28 00:50:41,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50062 conditions, 18520 events. 9464/18520 cut-off events. For 34154/34154 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 134635 event pairs, 1796 based on Foata normal form. 285/18692 useless extension candidates. Maximal degree in co-relation 50029. Up to 3051 conditions per place. [2024-06-28 00:50:41,194 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 484 selfloop transitions, 327 changer transitions 0/818 dead transitions. [2024-06-28 00:50:41,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 818 transitions, 6816 flow [2024-06-28 00:50:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-06-28 00:50:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-06-28 00:50:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 997 transitions. [2024-06-28 00:50:41,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945140131186643 [2024-06-28 00:50:41,197 INFO L175 Difference]: Start difference. First operand has 123 places, 138 transitions, 1250 flow. Second operand 43 states and 997 transitions. [2024-06-28 00:50:41,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 818 transitions, 6816 flow [2024-06-28 00:50:41,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 818 transitions, 6514 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-28 00:50:41,368 INFO L231 Difference]: Finished difference. Result has 176 places, 398 transitions, 4337 flow [2024-06-28 00:50:41,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=4337, PETRI_PLACES=176, PETRI_TRANSITIONS=398} [2024-06-28 00:50:41,370 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 139 predicate places. [2024-06-28 00:50:41,370 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 398 transitions, 4337 flow [2024-06-28 00:50:41,370 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) [2024-06-28 00:50:41,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:41,371 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] [2024-06-28 00:50:41,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:41,588 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 [2024-06-28 00:50:41,588 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)] === [2024-06-28 00:50:41,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:41,589 INFO L85 PathProgramCache]: Analyzing trace with hash -141379606, now seen corresponding path program 2 times [2024-06-28 00:50:41,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:41,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148604604] [2024-06-28 00:50:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:41,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:42,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:42,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148604604] [2024-06-28 00:50:42,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148604604] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:42,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854010220] [2024-06-28 00:50:42,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 00:50:42,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:42,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:42,626 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) [2024-06-28 00:50:42,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-28 00:50:42,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 00:50:42,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:50:42,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-28 00:50:42,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:42,806 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 [2024-06-28 00:50:42,878 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 [2024-06-28 00:50:42,882 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 [2024-06-28 00:50:42,897 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 [2024-06-28 00:50:43,090 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 [2024-06-28 00:50:43,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:43,098 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 [2024-06-28 00:50:43,134 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:43,135 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 [2024-06-28 00:50:44,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:50:44,336 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 [2024-06-28 00:50:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:44,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:44,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854010220] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:44,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:44,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 26 [2024-06-28 00:50:44,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876107608] [2024-06-28 00:50:44,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:44,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-28 00:50:44,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:44,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-28 00:50:44,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-06-28 00:50:44,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:44,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 398 transitions, 4337 flow. Second operand has 26 states, 26 states have (on average 14.615384615384615) internal successors, (380), 26 states have internal predecessors, (380), 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) [2024-06-28 00:50:44,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:44,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:44,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:50:50,842 INFO L124 PetriNetUnfolderBase]: 15623/30350 cut-off events. [2024-06-28 00:50:50,842 INFO L125 PetriNetUnfolderBase]: For 99773/99773 co-relation queries the response was YES. [2024-06-28 00:50:51,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88963 conditions, 30350 events. 15623/30350 cut-off events. For 99773/99773 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 231771 event pairs, 2318 based on Foata normal form. 322/30377 useless extension candidates. Maximal degree in co-relation 88913. Up to 5076 conditions per place. [2024-06-28 00:50:51,116 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 412 selfloop transitions, 551 changer transitions 32/1002 dead transitions. [2024-06-28 00:50:51,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1002 transitions, 10864 flow [2024-06-28 00:50:51,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-28 00:50:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-28 00:50:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 806 transitions. [2024-06-28 00:50:51,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2024-06-28 00:50:51,119 INFO L175 Difference]: Start difference. First operand has 176 places, 398 transitions, 4337 flow. Second operand 38 states and 806 transitions. [2024-06-28 00:50:51,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1002 transitions, 10864 flow [2024-06-28 00:50:51,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 1002 transitions, 10153 flow, removed 337 selfloop flow, removed 1 redundant places. [2024-06-28 00:50:51,879 INFO L231 Difference]: Finished difference. Result has 237 places, 674 transitions, 8726 flow [2024-06-28 00:50:51,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8726, PETRI_PLACES=237, PETRI_TRANSITIONS=674} [2024-06-28 00:50:51,880 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 200 predicate places. [2024-06-28 00:50:51,881 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 674 transitions, 8726 flow [2024-06-28 00:50:51,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.615384615384615) internal successors, (380), 26 states have internal predecessors, (380), 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) [2024-06-28 00:50:51,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:50:51,881 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] [2024-06-28 00:50:51,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-28 00:50:52,089 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 [2024-06-28 00:50:52,090 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)] === [2024-06-28 00:50:52,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:50:52,090 INFO L85 PathProgramCache]: Analyzing trace with hash -315814756, now seen corresponding path program 1 times [2024-06-28 00:50:52,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:50:52,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343828476] [2024-06-28 00:50:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:52,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:50:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 00:50:52,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:50:52,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343828476] [2024-06-28 00:50:52,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343828476] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:50:52,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77328231] [2024-06-28 00:50:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:50:52,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:50:52,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:50:52,469 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) [2024-06-28 00:50:52,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-28 00:50:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:50:52,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-28 00:50:52,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:50:52,656 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 [2024-06-28 00:50:52,691 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 [2024-06-28 00:50:52,782 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 [2024-06-28 00:50:52,822 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 [2024-06-28 00:50:52,853 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 [2024-06-28 00:50:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:50:53,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:50:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 45 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-06-28 00:50:53,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77328231] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:50:53,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:50:53,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 20 [2024-06-28 00:50:53,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122134325] [2024-06-28 00:50:53,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:50:53,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-28 00:50:53,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:50:53,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-28 00:50:53,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2024-06-28 00:50:53,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:50:53,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 674 transitions, 8726 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) [2024-06-28 00:50:53,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:50:53,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:50:53,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:51:08,854 INFO L124 PetriNetUnfolderBase]: 37452/72897 cut-off events. [2024-06-28 00:51:08,854 INFO L125 PetriNetUnfolderBase]: For 529133/529133 co-relation queries the response was YES. [2024-06-28 00:51:09,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232108 conditions, 72897 events. 37452/72897 cut-off events. For 529133/529133 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 613755 event pairs, 4725 based on Foata normal form. 747/73615 useless extension candidates. Maximal degree in co-relation 232032. Up to 12156 conditions per place. [2024-06-28 00:51:09,790 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 676 selfloop transitions, 1522 changer transitions 30/2235 dead transitions. [2024-06-28 00:51:09,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 2235 transitions, 27481 flow [2024-06-28 00:51:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-06-28 00:51:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-06-28 00:51:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1417 transitions. [2024-06-28 00:51:09,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558974358974359 [2024-06-28 00:51:09,796 INFO L175 Difference]: Start difference. First operand has 237 places, 674 transitions, 8726 flow. Second operand 65 states and 1417 transitions. [2024-06-28 00:51:09,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 2235 transitions, 27481 flow [2024-06-28 00:51:17,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 2235 transitions, 25817 flow, removed 832 selfloop flow, removed 0 redundant places. [2024-06-28 00:51:17,733 INFO L231 Difference]: Finished difference. Result has 315 places, 1650 transitions, 22945 flow [2024-06-28 00:51:17,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8156, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=590, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=22945, PETRI_PLACES=315, PETRI_TRANSITIONS=1650} [2024-06-28 00:51:17,734 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 278 predicate places. [2024-06-28 00:51:17,734 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 1650 transitions, 22945 flow [2024-06-28 00:51:17,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-06-28 00:51:17,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:51:17,735 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:51:17,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-06-28 00:51:17,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:17,936 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-06-28 00:51:17,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:51:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1532591870, now seen corresponding path program 3 times [2024-06-28 00:51:17,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:51:17,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058168962] [2024-06-28 00:51:17,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:51:17,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:51:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:51:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:18,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:51:18,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058168962] [2024-06-28 00:51:18,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058168962] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 00:51:18,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097807457] [2024-06-28 00:51:18,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 00:51:18,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 00:51:18,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:51:18,991 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 00:51:18,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-28 00:51:19,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-28 00:51:19,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 00:51:19,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 24 conjunts are in the unsatisfiable core [2024-06-28 00:51:19,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 00:51:19,237 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 [2024-06-28 00:51:19,309 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 80 treesize of output 64 [2024-06-28 00:51:19,312 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 64 treesize of output 90 [2024-06-28 00:51:19,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 58 treesize of output 20 [2024-06-28 00:51:19,513 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 159 treesize of output 131 [2024-06-28 00:51:19,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:51:19,522 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 131 treesize of output 135 [2024-06-28 00:51:19,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 32 [2024-06-28 00:51:20,019 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 319 treesize of output 267 [2024-06-28 00:51:20,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:51:20,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 267 treesize of output 209 [2024-06-28 00:51:20,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 236 [2024-06-28 00:51:26,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 00:51:26,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 455 treesize of output 207 [2024-06-28 00:51:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:26,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 00:51:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:51:26,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097807457] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 00:51:26,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 00:51:26,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2024-06-28 00:51:26,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617705592] [2024-06-28 00:51:26,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 00:51:26,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-28 00:51:26,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:51:26,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-28 00:51:26,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2024-06-28 00:51:26,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 00:51:26,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 1650 transitions, 22945 flow. Second operand has 29 states, 29 states have (on average 15.551724137931034) internal successors, (451), 29 states have internal predecessors, (451), 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) [2024-06-28 00:51:26,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:51:26,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 00:51:26,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand