./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/queue_ok.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/queue_ok.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/queue_ok.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/queue_ok.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 15:59:59,776 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:59:59,838 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:59:59,847 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:59:59,847 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:59:59,902 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:59:59,903 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:59:59,903 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:59:59,904 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:59:59,907 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:59:59,907 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:59:59,907 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:59:59,908 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:59:59,909 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:59:59,909 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:59:59,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:59:59,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:59:59,910 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:59:59,910 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:59:59,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:59:59,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:59:59,911 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:59:59,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:59:59,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:59:59,911 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:59:59,911 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:59:59,912 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:59:59,912 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:59:59,912 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:59:59,912 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:59:59,913 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:59:59,913 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:59:59,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:59:59,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:59:59,914 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:59:59,914 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:59:59,914 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:59:59,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:59:59,915 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:59:59,915 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:59:59,915 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:59:59,915 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:59:59,916 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:59:59,916 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:00:00,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:00:00,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:00:00,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:00:00,123 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:00:00,123 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:00:00,124 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/queue_ok.yml/witness.yml [2024-06-04 16:00:00,301 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:00:00,302 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:00:00,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_ok.i [2024-06-04 16:00:01,466 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:00:01,719 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:00:01,720 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok.i [2024-06-04 16:00:01,736 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b836c766/612f7f5db2a04c179ce6175c7591b38e/FLAG8edd7ab56 [2024-06-04 16:00:01,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b836c766/612f7f5db2a04c179ce6175c7591b38e [2024-06-04 16:00:01,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:00:01,753 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:00:01,756 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:00:01,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:00:01,761 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:00:01,762 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:00:00" (1/2) ... [2024-06-04 16:00:01,763 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e1fda9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:00:01, skipping insertion in model container [2024-06-04 16:00:01,763 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:00:00" (1/2) ... [2024-06-04 16:00:01,765 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4576fb7a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:00:01, skipping insertion in model container [2024-06-04 16:00:01,768 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:00:01" (2/2) ... [2024-06-04 16:00:01,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e1fda9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:01, skipping insertion in model container [2024-06-04 16:00:01,769 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:00:01" (2/2) ... [2024-06-04 16:00:01,770 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:00:01,815 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:00:01,816 INFO L97 edCorrectnessWitness]: Location invariant before [L1053-L1053] ((! multithreaded || (m_locked || ((((-1LL + (long long )dequeue_flag) + (long long )enqueue_flag >= 0LL && (1LL - (long long )dequeue_flag) + (long long )enqueue_flag >= 0LL) && (1LL + (long long )dequeue_flag) - (long long )enqueue_flag >= 0LL) && (1LL - (long long )dequeue_flag) - (long long )enqueue_flag >= 0LL))) && (! multithreaded || 0 <= queue.head)) && (! multithreaded || (m_locked || (-2147483645 <= queue.tail && 0 <= queue.head))) [2024-06-04 16:00:01,816 INFO L97 edCorrectnessWitness]: Location invariant before [L1054-L1054] ((! multithreaded || (m_locked || ((((-1LL + (long long )dequeue_flag) + (long long )enqueue_flag >= 0LL && (1LL - (long long )dequeue_flag) + (long long )enqueue_flag >= 0LL) && (1LL + (long long )dequeue_flag) - (long long )enqueue_flag >= 0LL) && (1LL - (long long )dequeue_flag) - (long long )enqueue_flag >= 0LL))) && (! multithreaded || 0 <= queue.head)) && (! multithreaded || (m_locked || (-2147483645 <= queue.tail && 0 <= queue.head))) [2024-06-04 16:00:01,816 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-04 16:00:01,817 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:00:01,817 INFO L106 edCorrectnessWitness]: ghost_update [L1026-L1026] m_locked = 1; [2024-06-04 16:00:01,817 INFO L106 edCorrectnessWitness]: ghost_update [L1008-L1008] m_locked = 1; [2024-06-04 16:00:01,818 INFO L106 edCorrectnessWitness]: ghost_update [L1020-L1020] m_locked = 0; [2024-06-04 16:00:01,818 INFO L106 edCorrectnessWitness]: ghost_update [L1039-L1039] m_locked = 0; [2024-06-04 16:00:01,818 INFO L106 edCorrectnessWitness]: ghost_update [L1052-L1052] multithreaded = 1; [2024-06-04 16:00:01,858 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:00:02,241 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:00:02,258 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:00:02,472 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:00:02,538 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:00:02,539 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02 WrapperNode [2024-06-04 16:00:02,539 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:00:02,540 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:00:02,540 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:00:02,540 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:00:02,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (1/1) ... [2024-06-04 16:00:02,580 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (1/1) ... [2024-06-04 16:00:02,632 INFO L138 Inliner]: procedures = 274, calls = 189, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 756 [2024-06-04 16:00:02,641 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:00:02,642 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:00:02,643 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:00:02,643 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:00:02,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (1/1) ... [2024-06-04 16:00:02,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (1/1) ... [2024-06-04 16:00:02,662 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (1/1) ... [2024-06-04 16:00:02,697 INFO L175 MemorySlicer]: Split 172 memory accesses to 4 slices as follows [2, 162, 5, 3]. 94 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0]. The 13 writes are split as follows [0, 11, 0, 2]. [2024-06-04 16:00:02,697 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (1/1) ... [2024-06-04 16:00:02,710 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (1/1) ... [2024-06-04 16:00:02,722 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (1/1) ... [2024-06-04 16:00:02,726 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (1/1) ... [2024-06-04 16:00:02,728 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (1/1) ... [2024-06-04 16:00:02,730 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (1/1) ... [2024-06-04 16:00:02,734 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:00:02,735 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:00:02,735 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:00:02,735 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:00:02,736 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (1/1) ... [2024-06-04 16:00:02,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:00:02,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:00:02,783 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) [2024-06-04 16:00:02,796 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 [2024-06-04 16:00:02,810 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-04 16:00:02,811 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-04 16:00:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-04 16:00:02,811 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-04 16:00:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-04 16:00:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-04 16:00:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-04 16:00:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-04 16:00:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-04 16:00:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-04 16:00:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-04 16:00:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-04 16:00:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-04 16:00:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-04 16:00:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:00:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:00:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-04 16:00:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-04 16:00:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-04 16:00:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:00:02,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:00:02,817 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:00:02,948 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:00:02,949 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:00:03,566 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:00:03,566 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:00:04,718 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:00:04,719 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-04 16:00:04,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:00:04 BoogieIcfgContainer [2024-06-04 16:00:04,719 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:00:04,722 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:00:04,722 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:00:04,725 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:00:04,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:00:00" (1/4) ... [2024-06-04 16:00:04,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5d2bb2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:00:04, skipping insertion in model container [2024-06-04 16:00:04,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:00:01" (2/4) ... [2024-06-04 16:00:04,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5d2bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:00:04, skipping insertion in model container [2024-06-04 16:00:04,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:02" (3/4) ... [2024-06-04 16:00:04,728 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5d2bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:00:04, skipping insertion in model container [2024-06-04 16:00:04,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:00:04" (4/4) ... [2024-06-04 16:00:04,730 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok.i [2024-06-04 16:00:04,745 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:00:04,745 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-04 16:00:04,745 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:00:04,852 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-04 16:00:04,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 35 transitions, 84 flow [2024-06-04 16:00:04,915 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-06-04 16:00:04,916 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-04 16:00:04,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 4/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 45 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-06-04 16:00:04,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 35 transitions, 84 flow [2024-06-04 16:00:04,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 31 transitions, 71 flow [2024-06-04 16:00:04,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:00:04,942 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;@5e174eeb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:00:04,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-04 16:00:04,949 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:00:04,949 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:00:04,950 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:00:04,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:00:04,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:00:04,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:00:04,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:00:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1827458270, now seen corresponding path program 1 times [2024-06-04 16:00:04,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:00:04,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040224652] [2024-06-04 16:00:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:04,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:00:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:00:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:05,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:00:05,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040224652] [2024-06-04 16:00:05,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040224652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:00:05,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:00:05,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:00:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934730989] [2024-06-04 16:00:05,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:00:05,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:00:05,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:00:05,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:00:05,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:00:05,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-06-04 16:00:05,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2024-06-04 16:00:05,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:00:05,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-06-04 16:00:05,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:00:06,167 INFO L124 PetriNetUnfolderBase]: 305/525 cut-off events. [2024-06-04 16:00:06,167 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-04 16:00:06,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 525 events. 305/525 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2023 event pairs, 82 based on Foata normal form. 12/466 useless extension candidates. Maximal degree in co-relation 968. Up to 336 conditions per place. [2024-06-04 16:00:06,174 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 32 selfloop transitions, 9 changer transitions 4/49 dead transitions. [2024-06-04 16:00:06,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 49 transitions, 200 flow [2024-06-04 16:00:06,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:00:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:00:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-04 16:00:06,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-04 16:00:06,189 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 71 flow. Second operand 5 states and 80 transitions. [2024-06-04 16:00:06,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 49 transitions, 200 flow [2024-06-04 16:00:06,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:00:06,195 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 119 flow [2024-06-04 16:00:06,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-06-04 16:00:06,199 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2024-06-04 16:00:06,200 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 119 flow [2024-06-04 16:00:06,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2024-06-04 16:00:06,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:00:06,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:00:06,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:00:06,202 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:00:06,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:00:06,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1194446358, now seen corresponding path program 1 times [2024-06-04 16:00:06,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:00:06,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955019036] [2024-06-04 16:00:06,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:06,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:00:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:00:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:06,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:00:06,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955019036] [2024-06-04 16:00:06,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955019036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:00:06,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:00:06,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:00:06,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105678519] [2024-06-04 16:00:06,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:00:06,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:00:06,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:00:06,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:00:06,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:00:06,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-04 16:00:06,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 119 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2024-06-04 16:00:06,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:00:06,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-04 16:00:06,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:00:07,315 INFO L124 PetriNetUnfolderBase]: 408/736 cut-off events. [2024-06-04 16:00:07,316 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-06-04 16:00:07,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1723 conditions, 736 events. 408/736 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3409 event pairs, 158 based on Foata normal form. 79/754 useless extension candidates. Maximal degree in co-relation 1691. Up to 352 conditions per place. [2024-06-04 16:00:07,322 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 41 selfloop transitions, 9 changer transitions 54/108 dead transitions. [2024-06-04 16:00:07,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 108 transitions, 525 flow [2024-06-04 16:00:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:00:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:00:07,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-04 16:00:07,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 16:00:07,328 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 119 flow. Second operand 8 states and 155 transitions. [2024-06-04 16:00:07,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 108 transitions, 525 flow [2024-06-04 16:00:07,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 108 transitions, 525 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-04 16:00:07,338 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 203 flow [2024-06-04 16:00:07,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=203, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-04 16:00:07,339 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2024-06-04 16:00:07,339 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 203 flow [2024-06-04 16:00:07,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2024-06-04 16:00:07,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:00:07,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:00:07,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:00:07,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:00:07,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:00:07,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1441416199, now seen corresponding path program 1 times [2024-06-04 16:00:07,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:00:07,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919899370] [2024-06-04 16:00:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:07,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:00:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:00:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:07,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:00:07,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919899370] [2024-06-04 16:00:07,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919899370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:00:07,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:00:07,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:00:07,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486120486] [2024-06-04 16:00:07,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:00:07,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:00:07,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:00:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:00:07,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:00:07,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-06-04 16:00:07,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-06-04 16:00:07,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:00:07,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-06-04 16:00:07,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:00:07,567 INFO L124 PetriNetUnfolderBase]: 185/363 cut-off events. [2024-06-04 16:00:07,567 INFO L125 PetriNetUnfolderBase]: For 420/431 co-relation queries the response was YES. [2024-06-04 16:00:07,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1178 conditions, 363 events. 185/363 cut-off events. For 420/431 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1426 event pairs, 90 based on Foata normal form. 22/362 useless extension candidates. Maximal degree in co-relation 1124. Up to 277 conditions per place. [2024-06-04 16:00:07,570 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 39 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-06-04 16:00:07,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 49 transitions, 327 flow [2024-06-04 16:00:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:00:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:00:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-06-04 16:00:07,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 16:00:07,573 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 203 flow. Second operand 3 states and 56 transitions. [2024-06-04 16:00:07,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 49 transitions, 327 flow [2024-06-04 16:00:07,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 325 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-04 16:00:07,576 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 201 flow [2024-06-04 16:00:07,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2024-06-04 16:00:07,577 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2024-06-04 16:00:07,577 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 201 flow [2024-06-04 16:00:07,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-06-04 16:00:07,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:00:07,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:00:07,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:00:07,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:00:07,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:00:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1442025977, now seen corresponding path program 1 times [2024-06-04 16:00:07,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:00:07,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519287837] [2024-06-04 16:00:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:07,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:00:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:00:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:07,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:00:07,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519287837] [2024-06-04 16:00:07,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519287837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:00:07,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:00:07,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:00:07,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818863207] [2024-06-04 16:00:07,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:00:07,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:00:07,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:00:07,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:00:07,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:00:07,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-04 16:00:07,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 201 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2024-06-04 16:00:07,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:00:07,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-04 16:00:07,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:00:08,130 INFO L124 PetriNetUnfolderBase]: 251/444 cut-off events. [2024-06-04 16:00:08,130 INFO L125 PetriNetUnfolderBase]: For 587/603 co-relation queries the response was YES. [2024-06-04 16:00:08,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1499 conditions, 444 events. 251/444 cut-off events. For 587/603 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1654 event pairs, 101 based on Foata normal form. 18/446 useless extension candidates. Maximal degree in co-relation 1444. Up to 294 conditions per place. [2024-06-04 16:00:08,133 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 49 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-04 16:00:08,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 463 flow [2024-06-04 16:00:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:00:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:00:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 16:00:08,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-04 16:00:08,135 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 201 flow. Second operand 6 states and 102 transitions. [2024-06-04 16:00:08,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 463 flow [2024-06-04 16:00:08,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 442 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-04 16:00:08,138 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 287 flow [2024-06-04 16:00:08,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-04 16:00:08,139 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2024-06-04 16:00:08,139 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 287 flow [2024-06-04 16:00:08,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2024-06-04 16:00:08,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:00:08,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:00:08,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:00:08,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:00:08,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:00:08,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1010993568, now seen corresponding path program 1 times [2024-06-04 16:00:08,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:00:08,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027550756] [2024-06-04 16:00:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:08,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:00:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:00:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:08,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:00:08,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027550756] [2024-06-04 16:00:08,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027550756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:00:08,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:00:08,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:00:08,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980514768] [2024-06-04 16:00:08,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:00:08,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:00:08,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:00:08,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:00:08,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:00:08,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-04 16:00:08,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 287 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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) [2024-06-04 16:00:08,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:00:08,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-04 16:00:08,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:00:08,875 INFO L124 PetriNetUnfolderBase]: 308/561 cut-off events. [2024-06-04 16:00:08,875 INFO L125 PetriNetUnfolderBase]: For 1224/1250 co-relation queries the response was YES. [2024-06-04 16:00:08,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2089 conditions, 561 events. 308/561 cut-off events. For 1224/1250 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2361 event pairs, 49 based on Foata normal form. 9/537 useless extension candidates. Maximal degree in co-relation 1981. Up to 311 conditions per place. [2024-06-04 16:00:08,881 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 55 selfloop transitions, 26 changer transitions 0/85 dead transitions. [2024-06-04 16:00:08,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 85 transitions, 632 flow [2024-06-04 16:00:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:00:08,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:00:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 16:00:08,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-04 16:00:08,883 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 287 flow. Second operand 8 states and 124 transitions. [2024-06-04 16:00:08,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 85 transitions, 632 flow [2024-06-04 16:00:08,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 85 transitions, 608 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-06-04 16:00:08,887 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 438 flow [2024-06-04 16:00:08,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=438, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-04 16:00:08,889 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2024-06-04 16:00:08,889 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 438 flow [2024-06-04 16:00:08,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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) [2024-06-04 16:00:08,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:00:08,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:00:08,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:00:08,890 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:00:08,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:00:08,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1734225824, now seen corresponding path program 1 times [2024-06-04 16:00:08,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:00:08,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711160858] [2024-06-04 16:00:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:08,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:00:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:00:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:08,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:00:08,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711160858] [2024-06-04 16:00:08,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711160858] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:00:08,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620588460] [2024-06-04 16:00:08,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:08,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:00:08,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:00:08,989 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) [2024-06-04 16:00:09,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-04 16:00:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:00:09,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-04 16:00:09,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 16:00:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:09,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-04 16:00:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:09,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620588460] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-04 16:00:09,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-04 16:00:09,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-06-04 16:00:09,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433138034] [2024-06-04 16:00:09,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-04 16:00:09,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:00:09,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:00:09,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:00:09,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:00:09,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-06-04 16:00:09,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 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) [2024-06-04 16:00:09,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:00:09,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-06-04 16:00:09,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:00:09,598 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1652] L1027-2-->L1039-2: Formula: (and (= (store |v_#pthreadsMutex_40| |v_~#m~0.base_62| (store (select |v_#pthreadsMutex_40| |v_~#m~0.base_62|) |v_~#m~0.offset_62| 0)) |v_#pthreadsMutex_39|) (= |v_#ghost~m_locked_198| 0) (= |v_t2Thread1of1ForFork1_#t~ret59#1_1| 0)) InVars {#pthreadsMutex=|v_#pthreadsMutex_40|, ~#m~0.base=|v_~#m~0.base_62|, ~#m~0.offset=|v_~#m~0.offset_62|} OutVars{#pthreadsMutex=|v_#pthreadsMutex_39|, t2Thread1of1ForFork1_#t~ret59#1=|v_t2Thread1of1ForFork1_#t~ret59#1_1|, ~#m~0.base=|v_~#m~0.base_62|, #ghost~m_locked=|v_#ghost~m_locked_198|, ~#m~0.offset=|v_~#m~0.offset_62|} AuxVars[] AssignedVars[#pthreadsMutex, t2Thread1of1ForFork1_#t~ret59#1, #ghost~m_locked][84], [Black: 58#(and (= (select (select |#memory_int#1| |~#queue~0.base|) (+ |~#queue~0.offset| 80)) 0) (= |ULTIMATE.start_main_#t~mem206#1| 0) (= |ULTIMATE.start_main_#t~mem183#1| 0) (or (= (+ ~enqueue_flag~0 ~dequeue_flag~0) (+ (* (div ~enqueue_flag~0 256) 256) (* 256 (div ~dequeue_flag~0 256)) 1)) (= |#ghost~multithreaded| 0)) (= |ULTIMATE.start_main_#t~mem158#1| 0) (= (select (select |#memory_int#1| |~#queue~0.base|) (+ 84 |~#queue~0.offset|)) 0) (= |#ghost~m_locked| 0)), Black: 52#(and (= (select (select |#memory_int#1| |~#queue~0.base|) (+ |~#queue~0.offset| 80)) 0) (= (select (select |#memory_int#1| |~#queue~0.base|) (+ 84 |~#queue~0.offset|)) 0) (= |#ghost~m_locked| 0)), 8#L1011-5true, t2Thread1of1ForFork1InUse, 80#true, 70#true, 41#true, 50#true, Black: 74#(and (= |ULTIMATE.start_main_#t~mem206#1| 0) (= |ULTIMATE.start_main_#t~mem183#1| 0) (= |ULTIMATE.start_main_#t~mem158#1| 0) (= |#ghost~m_locked| 1)), Black: 73#(and (= (select (select |#memory_int#1| |~#queue~0.base|) (+ |~#queue~0.offset| 80)) 0) (= |#ghost~m_locked| 1) (= (select (select |#memory_int#1| |~#queue~0.base|) (+ 84 |~#queue~0.offset|)) 0)), Black: 76#(and (= (select (select |#memory_int#1| |~#queue~0.base|) (+ |~#queue~0.offset| 80)) 0) (= |ULTIMATE.start_main_#t~mem206#1| 0) (= |ULTIMATE.start_main_#t~mem183#1| 0) (= |ULTIMATE.start_main_#t~mem158#1| 0) (= |#ghost~m_locked| 1) (= (select (select |#memory_int#1| |~#queue~0.base|) (+ 84 |~#queue~0.offset|)) 0)), Black: 44#(and (= 0 ~dequeue_flag~0) (= |ULTIMATE.start_main_#t~mem86#1| 0) (= ~enqueue_flag~0 1) (= |ULTIMATE.start_main_#t~mem134#1| 0) (= |ULTIMATE.start_main_#t~mem111#1| 0)), Black: 46#(and (= 0 ~dequeue_flag~0) (= |ULTIMATE.start_main_#t~mem86#1| 0) (= (select (select |#memory_int#1| |~#queue~0.base|) (+ |~#queue~0.offset| 80)) 0) (= ~enqueue_flag~0 1) (= (select (select |#memory_int#1| |~#queue~0.base|) (+ 84 |~#queue~0.offset|)) 0) (= |ULTIMATE.start_main_#t~mem134#1| 0) (= |ULTIMATE.start_main_#t~mem111#1| 0)), Black: 43#(and (= 0 ~dequeue_flag~0) (= (select (select |#memory_int#1| |~#queue~0.base|) (+ |~#queue~0.offset| 80)) 0) (= ~enqueue_flag~0 1) (= (select (select |#memory_int#1| |~#queue~0.base|) (+ 84 |~#queue~0.offset|)) 0)), 138#(< |t1Thread1of1ForFork0_~i~0#1| 20), 31#ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANTtrue, 11#L1039-2true, Black: 90#(and (<= 1 |ULTIMATE.start_main_#t~mem111#1|) (<= 0 (select (select |#memory_int#1| |~#queue~0.base|) (+ |~#queue~0.offset| 80))) (<= 0 |ULTIMATE.start_main_#t~mem86#1|) (<= 1 (select (select |#memory_int#1| |~#queue~0.base|) (+ 84 |~#queue~0.offset|))) (= |#ghost~m_locked| |#ghost~multithreaded|) (= |ULTIMATE.start_main_#t~mem134#1| |ULTIMATE.start_main_#t~mem86#1|)), Black: 85#(and (<= 0 (select (select |#memory_int#1| |~#queue~0.base|) (+ |~#queue~0.offset| 80))) (<= 1 (select (select |#memory_int#1| |~#queue~0.base|) (+ 84 |~#queue~0.offset|))) (= |#ghost~m_locked| |#ghost~multithreaded|)), Black: 86#(and (<= 1 |ULTIMATE.start_main_#t~mem111#1|) (<= 0 |ULTIMATE.start_main_#t~mem86#1|) (= |#ghost~m_locked| |#ghost~multithreaded|) (= |ULTIMATE.start_main_#t~mem134#1| |ULTIMATE.start_main_#t~mem86#1|)), Black: 60#(and (= (select (select |#memory_int#1| |~#queue~0.base|) (+ |~#queue~0.offset| 80)) 0) (= |ULTIMATE.start_main_#t~mem206#1| 0) (= |ULTIMATE.start_main_#t~mem183#1| 0) (or (= (+ ~enqueue_flag~0 ~dequeue_flag~0) (+ (* (div ~enqueue_flag~0 256) 256) (* 256 (div ~dequeue_flag~0 256)) 1)) (= |#ghost~multithreaded| 0)) (= |ULTIMATE.start_main_#t~mem158#1| 0) (= (select (select |#memory_int#1| |~#queue~0.base|) (+ 84 |~#queue~0.offset|)) 0)), Black: 56#(and (= (select (select |#memory_int#1| |~#queue~0.base|) (+ |~#queue~0.offset| 80)) 0) (or (= (+ ~enqueue_flag~0 ~dequeue_flag~0) (+ (* (div ~enqueue_flag~0 256) 256) (* 256 (div ~dequeue_flag~0 256)) 1)) (= |#ghost~multithreaded| 0)) (= (select (select |#memory_int#1| |~#queue~0.base|) (+ 84 |~#queue~0.offset|)) 0) (= |#ghost~m_locked| 0)), Black: 53#(and (= (select (select |#memory_int#1| |~#queue~0.base|) (+ |~#queue~0.offset| 80)) 0) (or (= (+ ~enqueue_flag~0 ~dequeue_flag~0) (+ (* (div ~enqueue_flag~0 256) 256) (* 256 (div ~dequeue_flag~0 256)) 1)) (= |#ghost~multithreaded| 0)) (= (select (select |#memory_int#1| |~#queue~0.base|) (+ 84 |~#queue~0.offset|)) 0))]) [2024-06-04 16:00:09,599 INFO L294 olderBase$Statistics]: this new event has 22 ancestors and is cut-off event [2024-06-04 16:00:09,599 INFO L297 olderBase$Statistics]: existing Event has 21 ancestors and is cut-off event [2024-06-04 16:00:09,599 INFO L297 olderBase$Statistics]: existing Event has 21 ancestors and is cut-off event [2024-06-04 16:00:09,599 INFO L297 olderBase$Statistics]: existing Event has 22 ancestors and is cut-off event [2024-06-04 16:00:09,621 INFO L124 PetriNetUnfolderBase]: 361/657 cut-off events. [2024-06-04 16:00:09,621 INFO L125 PetriNetUnfolderBase]: For 1943/1968 co-relation queries the response was YES. [2024-06-04 16:00:09,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2858 conditions, 657 events. 361/657 cut-off events. For 1943/1968 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2850 event pairs, 70 based on Foata normal form. 95/701 useless extension candidates. Maximal degree in co-relation 2724. Up to 334 conditions per place. [2024-06-04 16:00:09,626 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 91 selfloop transitions, 12 changer transitions 0/108 dead transitions. [2024-06-04 16:00:09,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 108 transitions, 915 flow [2024-06-04 16:00:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:00:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:00:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-04 16:00:09,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-04 16:00:09,628 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 438 flow. Second operand 6 states and 118 transitions. [2024-06-04 16:00:09,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 108 transitions, 915 flow [2024-06-04 16:00:09,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 108 transitions, 870 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 16:00:09,633 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 452 flow [2024-06-04 16:00:09,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2024-06-04 16:00:09,634 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 34 predicate places. [2024-06-04 16:00:09,634 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 452 flow [2024-06-04 16:00:09,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 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) [2024-06-04 16:00:09,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:00:09,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:00:09,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-04 16:00:09,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-04 16:00:09,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:00:09,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:00:09,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1276007551, now seen corresponding path program 2 times [2024-06-04 16:00:09,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:00:09,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490697950] [2024-06-04 16:00:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:09,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:00:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:00:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:10,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:00:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490697950] [2024-06-04 16:00:10,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490697950] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:00:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740562956] [2024-06-04 16:00:10,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-04 16:00:10,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:00:10,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:00:10,538 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) [2024-06-04 16:00:10,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-04 16:00:10,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-04 16:00:10,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-04 16:00:10,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-04 16:00:10,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 16:00:10,875 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 16 treesize of output 15 [2024-06-04 16:00:10,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 141 treesize of output 125 [2024-06-04 16:00:11,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 109 treesize of output 99 [2024-06-04 16:00:11,057 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 [2024-06-04 16:00:11,082 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 [2024-06-04 16:00:11,120 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 84 treesize of output 64 [2024-06-04 16:00:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:11,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-04 16:00:11,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 5 [2024-06-04 16:00:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:20,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740562956] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-04 16:00:20,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-04 16:00:20,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 16 [2024-06-04 16:00:20,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440382135] [2024-06-04 16:00:20,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-04 16:00:20,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-04 16:00:20,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:00:20,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-04 16:00:20,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=228, Unknown=5, NotChecked=0, Total=306 [2024-06-04 16:00:22,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-04 16:00:22,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-06-04 16:00:22,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 452 flow. Second operand has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 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) [2024-06-04 16:00:22,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:00:22,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-06-04 16:00:22,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:00:23,553 INFO L124 PetriNetUnfolderBase]: 647/1075 cut-off events. [2024-06-04 16:00:23,553 INFO L125 PetriNetUnfolderBase]: For 4402/4438 co-relation queries the response was YES. [2024-06-04 16:00:23,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5336 conditions, 1075 events. 647/1075 cut-off events. For 4402/4438 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4794 event pairs, 34 based on Foata normal form. 19/1042 useless extension candidates. Maximal degree in co-relation 5115. Up to 431 conditions per place. [2024-06-04 16:00:23,561 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 103 selfloop transitions, 73 changer transitions 0/179 dead transitions. [2024-06-04 16:00:23,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 179 transitions, 1633 flow [2024-06-04 16:00:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-04 16:00:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-04 16:00:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 239 transitions. [2024-06-04 16:00:23,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016806722689076 [2024-06-04 16:00:23,562 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 452 flow. Second operand 17 states and 239 transitions. [2024-06-04 16:00:23,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 179 transitions, 1633 flow [2024-06-04 16:00:23,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 179 transitions, 1579 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-04 16:00:23,574 INFO L231 Difference]: Finished difference. Result has 93 places, 111 transitions, 1126 flow [2024-06-04 16:00:23,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1126, PETRI_PLACES=93, PETRI_TRANSITIONS=111} [2024-06-04 16:00:23,575 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 59 predicate places. [2024-06-04 16:00:23,575 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 111 transitions, 1126 flow [2024-06-04 16:00:23,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 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) [2024-06-04 16:00:23,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:00:23,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:00:23,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-04 16:00:23,788 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,SelfDestructingSolverStorable6 [2024-06-04 16:00:23,788 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:00:23,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:00:23,789 INFO L85 PathProgramCache]: Analyzing trace with hash -167192672, now seen corresponding path program 1 times [2024-06-04 16:00:23,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:00:23,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519172066] [2024-06-04 16:00:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:23,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:00:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:00:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:24,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:00:24,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519172066] [2024-06-04 16:00:24,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519172066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:00:24,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:00:24,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:00:24,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916629346] [2024-06-04 16:00:24,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:00:24,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:00:24,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:00:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:00:24,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:00:24,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-04 16:00:24,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 111 transitions, 1126 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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) [2024-06-04 16:00:24,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:00:24,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-04 16:00:24,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:00:24,597 INFO L124 PetriNetUnfolderBase]: 677/1128 cut-off events. [2024-06-04 16:00:24,597 INFO L125 PetriNetUnfolderBase]: For 6879/7017 co-relation queries the response was YES. [2024-06-04 16:00:24,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6287 conditions, 1128 events. 677/1128 cut-off events. For 6879/7017 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5034 event pairs, 142 based on Foata normal form. 96/1224 useless extension candidates. Maximal degree in co-relation 6050. Up to 750 conditions per place. [2024-06-04 16:00:24,609 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 112 selfloop transitions, 52 changer transitions 0/168 dead transitions. [2024-06-04 16:00:24,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 168 transitions, 1885 flow [2024-06-04 16:00:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:00:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:00:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 16:00:24,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-06-04 16:00:24,610 INFO L175 Difference]: Start difference. First operand has 93 places, 111 transitions, 1126 flow. Second operand 8 states and 137 transitions. [2024-06-04 16:00:24,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 168 transitions, 1885 flow [2024-06-04 16:00:24,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 168 transitions, 1746 flow, removed 65 selfloop flow, removed 1 redundant places. [2024-06-04 16:00:24,630 INFO L231 Difference]: Finished difference. Result has 102 places, 127 transitions, 1369 flow [2024-06-04 16:00:24,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1369, PETRI_PLACES=102, PETRI_TRANSITIONS=127} [2024-06-04 16:00:24,632 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 68 predicate places. [2024-06-04 16:00:24,632 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 127 transitions, 1369 flow [2024-06-04 16:00:24,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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) [2024-06-04 16:00:24,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:00:24,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:00:24,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:00:24,632 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:00:24,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:00:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash -887987031, now seen corresponding path program 2 times [2024-06-04 16:00:24,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:00:24,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918515224] [2024-06-04 16:00:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:24,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:00:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:00:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:25,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:00:25,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918515224] [2024-06-04 16:00:25,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918515224] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:00:25,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740062067] [2024-06-04 16:00:25,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-04 16:00:25,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:00:25,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:00:25,313 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) [2024-06-04 16:00:25,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-04 16:00:25,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-04 16:00:25,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-04 16:00:25,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-04 16:00:25,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 16:00:25,725 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 22 treesize of output 21 [2024-06-04 16:00:25,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 222 treesize of output 198 [2024-06-04 16:00:25,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 141 treesize of output 131 [2024-06-04 16:00:25,906 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 76 treesize of output 60 [2024-06-04 16:00:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:25,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-04 16:00:26,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 5 [2024-06-04 16:00:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:27,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740062067] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-04 16:00:27,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-04 16:00:27,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-06-04 16:00:27,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961878088] [2024-06-04 16:00:27,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-04 16:00:27,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-04 16:00:27,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:00:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-04 16:00:27,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-06-04 16:00:27,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-04 16:00:27,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 127 transitions, 1369 flow. Second operand has 17 states, 17 states have (on average 9.470588235294118) internal successors, (161), 17 states have internal predecessors, (161), 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) [2024-06-04 16:00:27,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:00:27,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-04 16:00:27,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:00:28,954 INFO L124 PetriNetUnfolderBase]: 747/1244 cut-off events. [2024-06-04 16:00:28,955 INFO L125 PetriNetUnfolderBase]: For 9347/9535 co-relation queries the response was YES. [2024-06-04 16:00:28,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7201 conditions, 1244 events. 747/1244 cut-off events. For 9347/9535 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5603 event pairs, 53 based on Foata normal form. 117/1361 useless extension candidates. Maximal degree in co-relation 6978. Up to 464 conditions per place. [2024-06-04 16:00:28,964 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 168 selfloop transitions, 136 changer transitions 0/308 dead transitions. [2024-06-04 16:00:28,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 308 transitions, 3375 flow [2024-06-04 16:00:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-04 16:00:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-04 16:00:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 458 transitions. [2024-06-04 16:00:28,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4221198156682028 [2024-06-04 16:00:28,967 INFO L175 Difference]: Start difference. First operand has 102 places, 127 transitions, 1369 flow. Second operand 31 states and 458 transitions. [2024-06-04 16:00:28,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 308 transitions, 3375 flow [2024-06-04 16:00:28,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 308 transitions, 3132 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-04 16:00:28,993 INFO L231 Difference]: Finished difference. Result has 143 places, 195 transitions, 2364 flow [2024-06-04 16:00:28,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2364, PETRI_PLACES=143, PETRI_TRANSITIONS=195} [2024-06-04 16:00:28,994 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 109 predicate places. [2024-06-04 16:00:28,994 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 195 transitions, 2364 flow [2024-06-04 16:00:28,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.470588235294118) internal successors, (161), 17 states have internal predecessors, (161), 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) [2024-06-04 16:00:28,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:00:28,995 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:00:29,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-04 16:00:29,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:00:29,210 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:00:29,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:00:29,210 INFO L85 PathProgramCache]: Analyzing trace with hash -156557895, now seen corresponding path program 2 times [2024-06-04 16:00:29,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:00:29,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451270257] [2024-06-04 16:00:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:29,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:00:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:00:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-04 16:00:29,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:00:29,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451270257] [2024-06-04 16:00:29,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451270257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:00:29,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:00:29,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:00:29,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792576136] [2024-06-04 16:00:29,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:00:29,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:00:29,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:00:29,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:00:29,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:00:29,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-04 16:00:29,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 195 transitions, 2364 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2024-06-04 16:00:29,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:00:29,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-04 16:00:29,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:00:29,884 INFO L124 PetriNetUnfolderBase]: 699/1198 cut-off events. [2024-06-04 16:00:29,884 INFO L125 PetriNetUnfolderBase]: For 14496/14518 co-relation queries the response was YES. [2024-06-04 16:00:29,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8063 conditions, 1198 events. 699/1198 cut-off events. For 14496/14518 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5532 event pairs, 152 based on Foata normal form. 13/1210 useless extension candidates. Maximal degree in co-relation 7757. Up to 1015 conditions per place. [2024-06-04 16:00:29,898 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 191 selfloop transitions, 28 changer transitions 0/223 dead transitions. [2024-06-04 16:00:29,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 223 transitions, 3079 flow [2024-06-04 16:00:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:00:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:00:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-04 16:00:29,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-04 16:00:29,901 INFO L175 Difference]: Start difference. First operand has 143 places, 195 transitions, 2364 flow. Second operand 8 states and 106 transitions. [2024-06-04 16:00:29,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 223 transitions, 3079 flow [2024-06-04 16:00:29,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 223 transitions, 2592 flow, removed 174 selfloop flow, removed 9 redundant places. [2024-06-04 16:00:29,942 INFO L231 Difference]: Finished difference. Result has 144 places, 202 transitions, 2055 flow [2024-06-04 16:00:29,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2055, PETRI_PLACES=144, PETRI_TRANSITIONS=202} [2024-06-04 16:00:29,943 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 110 predicate places. [2024-06-04 16:00:29,943 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 202 transitions, 2055 flow [2024-06-04 16:00:29,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2024-06-04 16:00:29,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:00:29,943 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:00:29,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:00:29,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:00:29,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:00:29,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1236416160, now seen corresponding path program 3 times [2024-06-04 16:00:29,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:00:29,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165839145] [2024-06-04 16:00:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:29,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:00:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:00:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:31,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:00:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165839145] [2024-06-04 16:00:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165839145] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:00:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548704877] [2024-06-04 16:00:31,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-04 16:00:31,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:00:31,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:00:31,258 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) [2024-06-04 16:00:31,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-04 16:00:31,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-04 16:00:31,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-04 16:00:31,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-04 16:00:31,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 16:00:31,677 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 16 treesize of output 15 [2024-06-04 16:00:31,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 164 treesize of output 140 [2024-06-04 16:00:31,772 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 76 treesize of output 60 [2024-06-04 16:00:31,779 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-06-04 16:00:31,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 156 treesize of output 134 [2024-06-04 16:00:31,820 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 90 treesize of output 68 [2024-06-04 16:00:31,833 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-06-04 16:00:31,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 163 treesize of output 139 [2024-06-04 16:00:31,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 138 treesize of output 120 [2024-06-04 16:00:31,958 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 [2024-06-04 16:00:31,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 130 treesize of output 114 [2024-06-04 16:00:32,013 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 [2024-06-04 16:00:32,017 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 [2024-06-04 16:00:32,056 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 77 treesize of output 55 [2024-06-04 16:00:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:00:32,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-04 16:00:32,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 5 [2024-06-04 16:00:32,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-04 16:00:32,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 37 treesize of output 21 [2024-06-04 16:01:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:03,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548704877] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-04 16:01:03,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-04 16:01:03,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 26 [2024-06-04 16:01:03,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77102663] [2024-06-04 16:01:03,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-04 16:01:03,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-04 16:01:03,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:03,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-04 16:01:03,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=618, Unknown=6, NotChecked=0, Total=756 [2024-06-04 16:01:03,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-06-04 16:01:03,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 202 transitions, 2055 flow. Second operand has 28 states, 28 states have (on average 7.5) internal successors, (210), 28 states have internal predecessors, (210), 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) [2024-06-04 16:01:03,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:03,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-06-04 16:01:03,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:12,026 INFO L124 PetriNetUnfolderBase]: 2665/4242 cut-off events. [2024-06-04 16:01:12,026 INFO L125 PetriNetUnfolderBase]: For 54424/54461 co-relation queries the response was YES. [2024-06-04 16:01:12,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26873 conditions, 4242 events. 2665/4242 cut-off events. For 54424/54461 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 22978 event pairs, 74 based on Foata normal form. 50/4292 useless extension candidates. Maximal degree in co-relation 26185. Up to 1263 conditions per place. [2024-06-04 16:01:12,075 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 274 selfloop transitions, 419 changer transitions 0/696 dead transitions. [2024-06-04 16:01:12,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 696 transitions, 8621 flow [2024-06-04 16:01:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-06-04 16:01:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-06-04 16:01:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 707 transitions. [2024-06-04 16:01:12,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38846153846153847 [2024-06-04 16:01:12,082 INFO L175 Difference]: Start difference. First operand has 144 places, 202 transitions, 2055 flow. Second operand 52 states and 707 transitions. [2024-06-04 16:01:12,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 696 transitions, 8621 flow [2024-06-04 16:01:12,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 696 transitions, 8454 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:12,163 INFO L231 Difference]: Finished difference. Result has 213 places, 494 transitions, 6510 flow [2024-06-04 16:01:12,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=6510, PETRI_PLACES=213, PETRI_TRANSITIONS=494} [2024-06-04 16:01:12,165 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 179 predicate places. [2024-06-04 16:01:12,165 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 494 transitions, 6510 flow [2024-06-04 16:01:12,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.5) internal successors, (210), 28 states have internal predecessors, (210), 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) [2024-06-04 16:01:12,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:12,165 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:12,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-04 16:01:12,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:01:12,379 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:01:12,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:12,379 INFO L85 PathProgramCache]: Analyzing trace with hash -558325056, now seen corresponding path program 1 times [2024-06-04 16:01:12,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:12,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253568855] [2024-06-04 16:01:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:12,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:12,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:12,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253568855] [2024-06-04 16:01:12,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253568855] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:01:12,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095841476] [2024-06-04 16:01:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:12,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:01:12,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:01:12,512 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) [2024-06-04 16:01:12,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-04 16:01:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:12,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-04 16:01:12,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 16:01:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:12,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-04 16:01:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:12,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095841476] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-04 16:01:12,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-04 16:01:12,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-06-04 16:01:12,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799349065] [2024-06-04 16:01:12,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-04 16:01:12,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 16:01:12,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:12,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 16:01:12,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-06-04 16:01:12,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-06-04 16:01:12,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 494 transitions, 6510 flow. Second operand has 13 states, 13 states have (on average 9.692307692307692) internal successors, (126), 13 states have internal predecessors, (126), 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) [2024-06-04 16:01:12,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:12,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-06-04 16:01:12,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:13,895 INFO L124 PetriNetUnfolderBase]: 1441/2459 cut-off events. [2024-06-04 16:01:13,895 INFO L125 PetriNetUnfolderBase]: For 31772/31865 co-relation queries the response was YES. [2024-06-04 16:01:13,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17900 conditions, 2459 events. 1441/2459 cut-off events. For 31772/31865 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 12953 event pairs, 111 based on Foata normal form. 417/2817 useless extension candidates. Maximal degree in co-relation 17685. Up to 1012 conditions per place. [2024-06-04 16:01:13,920 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 387 selfloop transitions, 83 changer transitions 0/475 dead transitions. [2024-06-04 16:01:13,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 475 transitions, 6755 flow [2024-06-04 16:01:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:01:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:01:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-04 16:01:13,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738095238095238 [2024-06-04 16:01:13,922 INFO L175 Difference]: Start difference. First operand has 213 places, 494 transitions, 6510 flow. Second operand 12 states and 241 transitions. [2024-06-04 16:01:13,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 475 transitions, 6755 flow [2024-06-04 16:01:14,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 475 transitions, 5510 flow, removed 525 selfloop flow, removed 12 redundant places. [2024-06-04 16:01:14,007 INFO L231 Difference]: Finished difference. Result has 217 places, 391 transitions, 4264 flow [2024-06-04 16:01:14,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3884, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4264, PETRI_PLACES=217, PETRI_TRANSITIONS=391} [2024-06-04 16:01:14,007 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 183 predicate places. [2024-06-04 16:01:14,008 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 391 transitions, 4264 flow [2024-06-04 16:01:14,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.692307692307692) internal successors, (126), 13 states have internal predecessors, (126), 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) [2024-06-04 16:01:14,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:14,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:14,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-04 16:01:14,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-04 16:01:14,220 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:01:14,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:14,221 INFO L85 PathProgramCache]: Analyzing trace with hash -402274815, now seen corresponding path program 1 times [2024-06-04 16:01:14,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:14,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594886947] [2024-06-04 16:01:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:14,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:14,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:14,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594886947] [2024-06-04 16:01:14,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594886947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:14,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:14,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:14,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538767081] [2024-06-04 16:01:14,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:14,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:01:14,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:14,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:01:14,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:01:14,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-06-04 16:01:14,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 391 transitions, 4264 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2024-06-04 16:01:14,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:14,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-06-04 16:01:14,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:14,748 INFO L124 PetriNetUnfolderBase]: 396/835 cut-off events. [2024-06-04 16:01:14,764 INFO L125 PetriNetUnfolderBase]: For 10609/10632 co-relation queries the response was YES. [2024-06-04 16:01:14,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5569 conditions, 835 events. 396/835 cut-off events. For 10609/10632 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3790 event pairs, 80 based on Foata normal form. 72/894 useless extension candidates. Maximal degree in co-relation 5485. Up to 660 conditions per place. [2024-06-04 16:01:14,771 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 141 selfloop transitions, 25 changer transitions 0/171 dead transitions. [2024-06-04 16:01:14,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 171 transitions, 2121 flow [2024-06-04 16:01:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:01:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:01:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-06-04 16:01:14,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 16:01:14,785 INFO L175 Difference]: Start difference. First operand has 217 places, 391 transitions, 4264 flow. Second operand 3 states and 56 transitions. [2024-06-04 16:01:14,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 171 transitions, 2121 flow [2024-06-04 16:01:14,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 171 transitions, 1751 flow, removed 57 selfloop flow, removed 44 redundant places. [2024-06-04 16:01:14,827 INFO L231 Difference]: Finished difference. Result has 147 places, 163 transitions, 1429 flow [2024-06-04 16:01:14,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1429, PETRI_PLACES=147, PETRI_TRANSITIONS=163} [2024-06-04 16:01:14,828 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 113 predicate places. [2024-06-04 16:01:14,829 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 163 transitions, 1429 flow [2024-06-04 16:01:14,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2024-06-04 16:01:14,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:14,829 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:14,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:01:14,829 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:01:14,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:14,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1938982992, now seen corresponding path program 3 times [2024-06-04 16:01:14,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:14,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830056049] [2024-06-04 16:01:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:14,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:16,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:16,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830056049] [2024-06-04 16:01:16,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830056049] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:01:16,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795174619] [2024-06-04 16:01:16,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-04 16:01:16,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:01:16,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:01:16,420 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) [2024-06-04 16:01:16,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-04 16:01:17,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-04 16:01:17,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-04 16:01:17,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-04 16:01:17,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 16:01:17,016 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 16 treesize of output 15 [2024-06-04 16:01:17,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 149 treesize of output 131 [2024-06-04 16:01:17,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 109 treesize of output 101 [2024-06-04 16:01:17,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 152 treesize of output 132 [2024-06-04 16:01:17,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 130 treesize of output 116 [2024-06-04 16:01:17,429 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 [2024-06-04 16:01:17,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 130 treesize of output 114 [2024-06-04 16:01:17,503 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 [2024-06-04 16:01:17,516 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 [2024-06-04 16:01:17,543 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 [2024-06-04 16:01:17,573 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-06-04 16:01:17,579 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 [2024-06-04 16:01:17,651 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 126 treesize of output 94 [2024-06-04 16:01:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:17,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-04 16:01:17,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 5 [2024-06-04 16:01:18,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 18 [2024-06-04 16:01:18,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 37 treesize of output 21 [2024-06-04 16:01:18,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 18 [2024-06-04 16:01:42,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-04 16:01:42,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 860 treesize of output 660 [2024-06-04 16:03:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:35,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795174619] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-04 16:03:35,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-04 16:03:35,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 12] total 30 [2024-06-04 16:03:35,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618704880] [2024-06-04 16:03:35,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-04 16:03:35,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-04 16:03:35,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-04 16:03:35,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=742, Unknown=25, NotChecked=0, Total=992 [2024-06-04 16:03:37,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-04 16:03:41,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-04 16:03:45,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-04 16:03:45,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-06-04 16:03:45,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 163 transitions, 1429 flow. Second operand has 32 states, 32 states have (on average 7.59375) internal successors, (243), 32 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:45,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:45,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-06-04 16:03:45,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:49,161 INFO L124 PetriNetUnfolderBase]: 469/969 cut-off events. [2024-06-04 16:04:49,162 INFO L125 PetriNetUnfolderBase]: For 12181/12181 co-relation queries the response was YES. [2024-06-04 16:04:49,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5218 conditions, 969 events. 469/969 cut-off events. For 12181/12181 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4513 event pairs, 41 based on Foata normal form. 92/1061 useless extension candidates. Maximal degree in co-relation 5161. Up to 285 conditions per place. [2024-06-04 16:04:49,168 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 195 selfloop transitions, 96 changer transitions 0/294 dead transitions. [2024-06-04 16:04:49,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 294 transitions, 2746 flow [2024-06-04 16:04:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-06-04 16:04:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-06-04 16:04:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 444 transitions. [2024-06-04 16:04:49,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3252747252747253 [2024-06-04 16:04:49,169 INFO L175 Difference]: Start difference. First operand has 147 places, 163 transitions, 1429 flow. Second operand 39 states and 444 transitions. [2024-06-04 16:04:49,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 294 transitions, 2746 flow [2024-06-04 16:04:49,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 294 transitions, 2715 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:04:49,187 INFO L231 Difference]: Finished difference. Result has 201 places, 189 transitions, 1894 flow [2024-06-04 16:04:49,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1894, PETRI_PLACES=201, PETRI_TRANSITIONS=189} [2024-06-04 16:04:49,188 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 167 predicate places. [2024-06-04 16:04:49,188 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 189 transitions, 1894 flow [2024-06-04 16:04:49,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.59375) internal successors, (243), 32 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:49,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:49,189 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:49,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-06-04 16:04:49,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:04:49,403 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:04:49,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:49,403 INFO L85 PathProgramCache]: Analyzing trace with hash -889365760, now seen corresponding path program 4 times [2024-06-04 16:04:49,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:49,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765251015] [2024-06-04 16:04:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:49,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:52,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:52,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765251015] [2024-06-04 16:04:52,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765251015] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:04:52,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841037517] [2024-06-04 16:04:52,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-04 16:04:52,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:04:52,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:04:52,592 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) [2024-06-04 16:04:52,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-04 16:04:52,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-04 16:04:52,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-04 16:04:52,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 64 conjunts are in the unsatisfiable core [2024-06-04 16:04:52,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 16:04:52,987 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 22 treesize of output 21 [2024-06-04 16:04:53,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 207 treesize of output 187 [2024-06-04 16:04:53,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 147 treesize of output 137 [2024-06-04 16:04:53,158 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 [2024-06-04 16:04:53,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 204 treesize of output 184 [2024-06-04 16:04:53,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 215 treesize of output 193 [2024-06-04 16:04:53,319 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-06-04 16:04:53,330 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 143 treesize of output 123 [2024-06-04 16:04:53,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 180 treesize of output 164 [2024-06-04 16:04:53,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 191 treesize of output 173 [2024-06-04 16:04:53,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 202 treesize of output 182 [2024-06-04 16:04:54,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 213 treesize of output 191 [2024-06-04 16:04:54,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 224 treesize of output 200 [2024-06-04 16:04:54,862 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 [2024-06-04 16:04:54,900 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 [2024-06-04 16:04:55,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 235 treesize of output 209 [2024-06-04 16:04:55,685 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 [2024-06-04 16:04:56,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 225 treesize of output 201 [2024-06-04 16:04:57,820 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 160 treesize of output 130 [2024-06-04 16:04:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:58,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-04 16:04:58,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 5 [2024-06-04 16:04:59,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 16 [2024-06-04 16:04:59,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 18 [2024-06-04 16:04:59,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-04 16:04:59,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 229 treesize of output 157 [2024-06-04 16:05:00,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 23 [2024-06-04 16:05:00,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 38 [2024-06-04 16:05:00,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-04 16:05:00,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 91 treesize of output 51 [2024-06-04 16:05:00,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 23 [2024-06-04 16:05:00,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 58 treesize of output 34 [2024-06-04 16:05:00,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-04 16:05:00,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 10 [2024-06-04 16:05:00,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 4 [2024-06-04 16:05:00,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 46 [2024-06-04 16:05:00,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 4 [2024-06-04 16:05:00,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-04 16:05:00,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 10 [2024-06-04 16:05:00,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 85 treesize of output 49 [2024-06-04 16:05:01,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 18 [2024-06-04 16:05:02,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 4 [2024-06-04 16:05:02,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 23 [2024-06-04 16:05:02,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-04 16:05:02,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 10 [2024-06-04 16:05:02,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 38 [2024-06-04 16:05:02,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 85 treesize of output 57 [2024-06-04 16:05:02,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 18 [2024-06-04 16:05:02,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 23 [2024-06-04 16:05:02,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 195 treesize of output 111 [2024-06-04 16:05:02,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 63 treesize of output 55 [2024-06-04 16:05:02,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 18 treesize of output 10 [2024-06-04 16:05:02,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 38 [2024-06-04 16:05:02,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 85 treesize of output 49 [2024-06-04 16:05:02,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 38 [2024-06-04 16:05:02,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 85 treesize of output 49 [2024-06-04 16:05:02,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 186 treesize of output 106 [2024-06-04 16:05:02,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 4 [2024-06-04 16:05:03,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 4 [2024-06-04 16:05:04,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 38 [2024-06-04 16:05:05,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-04 16:05:05,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 909 treesize of output 629 [2024-06-04 16:05:15,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 58 treesize of output 34 [2024-06-04 16:05:15,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 4 [2024-06-04 16:05:15,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 190 treesize of output 106 [2024-06-04 16:05:15,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-04 16:05:15,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 10 [2024-06-04 16:05:15,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 4 [2024-06-04 16:05:15,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 206 treesize of output 114 [2024-06-04 16:05:15,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 38 treesize of output 22 [2024-06-04 16:05:15,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 58 treesize of output 34 [2024-06-04 16:05:15,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 108 treesize of output 68 [2024-06-04 16:05:15,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 58 treesize of output 34 [2024-06-04 16:05:15,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 58 treesize of output 34 [2024-06-04 16:05:15,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 267 treesize of output 255 [2024-06-04 16:05:16,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 58 treesize of output 34 [2024-06-04 16:05:16,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 18 [2024-06-04 16:05:16,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 4 [2024-06-04 16:05:16,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 58 treesize of output 34 [2024-06-04 16:06:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:34,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841037517] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-04 16:06:34,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-04 16:06:34,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 43 [2024-06-04 16:06:34,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085771357] [2024-06-04 16:06:34,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-04 16:06:34,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-06-04 16:06:34,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:34,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-06-04 16:06:34,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1654, Unknown=5, NotChecked=0, Total=1980 [2024-06-04 16:06:34,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-06-04 16:06:34,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 189 transitions, 1894 flow. Second operand has 45 states, 45 states have (on average 7.333333333333333) internal successors, (330), 45 states have internal predecessors, (330), 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) [2024-06-04 16:06:34,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:34,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-06-04 16:06:34,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:14,083 INFO L124 PetriNetUnfolderBase]: 1613/2993 cut-off events. [2024-06-04 16:08:14,083 INFO L125 PetriNetUnfolderBase]: For 80287/80291 co-relation queries the response was YES. [2024-06-04 16:08:14,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23376 conditions, 2993 events. 1613/2993 cut-off events. For 80287/80291 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 16216 event pairs, 52 based on Foata normal form. 42/3033 useless extension candidates. Maximal degree in co-relation 23301. Up to 1173 conditions per place. [2024-06-04 16:08:14,127 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 237 selfloop transitions, 428 changer transitions 0/668 dead transitions. [2024-06-04 16:08:14,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 668 transitions, 9286 flow [2024-06-04 16:08:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-06-04 16:08:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-06-04 16:08:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 793 transitions. [2024-06-04 16:08:14,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33319327731092435 [2024-06-04 16:08:14,129 INFO L175 Difference]: Start difference. First operand has 201 places, 189 transitions, 1894 flow. Second operand 68 states and 793 transitions. [2024-06-04 16:08:14,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 668 transitions, 9286 flow [2024-06-04 16:08:14,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 668 transitions, 8823 flow, removed 179 selfloop flow, removed 18 redundant places. [2024-06-04 16:08:14,225 INFO L231 Difference]: Finished difference. Result has 271 places, 482 transitions, 5894 flow [2024-06-04 16:08:14,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=5894, PETRI_PLACES=271, PETRI_TRANSITIONS=482} [2024-06-04 16:08:14,226 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 237 predicate places. [2024-06-04 16:08:14,226 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 482 transitions, 5894 flow [2024-06-04 16:08:14,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 7.333333333333333) internal successors, (330), 45 states have internal predecessors, (330), 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) [2024-06-04 16:08:14,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:14,226 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:14,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-04 16:08:14,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:08:14,439 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:08:14,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1613215712, now seen corresponding path program 2 times [2024-06-04 16:08:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:14,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146918392] [2024-06-04 16:08:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:14,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:14,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:14,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146918392] [2024-06-04 16:08:14,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146918392] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:08:14,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522275447] [2024-06-04 16:08:14,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-04 16:08:14,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:08:14,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:08:14,712 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) [2024-06-04 16:08:14,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-04 16:08:15,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-04 16:08:15,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-04 16:08:15,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-04 16:08:15,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 16:08:15,055 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 22 treesize of output 21 [2024-06-04 16:08:15,151 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 85 treesize of output 67 [2024-06-04 16:08:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-06-04 16:08:15,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-04 16:08:15,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522275447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:15,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-04 16:08:15,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 17 [2024-06-04 16:08:15,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476972166] [2024-06-04 16:08:15,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:15,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:08:15,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:15,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:08:15,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-06-04 16:08:15,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-06-04 16:08:15,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 482 transitions, 5894 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2024-06-04 16:08:15,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:15,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-06-04 16:08:15,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:16,145 INFO L124 PetriNetUnfolderBase]: 1475/2797 cut-off events. [2024-06-04 16:08:16,146 INFO L125 PetriNetUnfolderBase]: For 52315/52371 co-relation queries the response was YES. [2024-06-04 16:08:16,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21466 conditions, 2797 events. 1475/2797 cut-off events. For 52315/52371 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 15270 event pairs, 134 based on Foata normal form. 2/2771 useless extension candidates. Maximal degree in co-relation 21371. Up to 2579 conditions per place. [2024-06-04 16:08:16,189 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 491 selfloop transitions, 48 changer transitions 0/542 dead transitions. [2024-06-04 16:08:16,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 542 transitions, 7518 flow [2024-06-04 16:08:16,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:08:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:08:16,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 75 transitions. [2024-06-04 16:08:16,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-04 16:08:16,206 INFO L175 Difference]: Start difference. First operand has 271 places, 482 transitions, 5894 flow. Second operand 6 states and 75 transitions. [2024-06-04 16:08:16,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 542 transitions, 7518 flow [2024-06-04 16:08:16,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 542 transitions, 6185 flow, removed 531 selfloop flow, removed 24 redundant places. [2024-06-04 16:08:16,346 INFO L231 Difference]: Finished difference. Result has 253 places, 482 transitions, 4771 flow [2024-06-04 16:08:16,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4658, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4771, PETRI_PLACES=253, PETRI_TRANSITIONS=482} [2024-06-04 16:08:16,347 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 219 predicate places. [2024-06-04 16:08:16,347 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 482 transitions, 4771 flow [2024-06-04 16:08:16,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2024-06-04 16:08:16,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:16,347 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:16,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-06-04 16:08:16,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-04 16:08:16,560 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:08:16,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:16,560 INFO L85 PathProgramCache]: Analyzing trace with hash 65982680, now seen corresponding path program 3 times [2024-06-04 16:08:16,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:16,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037567991] [2024-06-04 16:08:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:16,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:16,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:16,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037567991] [2024-06-04 16:08:16,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037567991] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:08:16,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297848152] [2024-06-04 16:08:16,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-04 16:08:16,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:08:16,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:08:16,845 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-04 16:08:16,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-04 16:08:17,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-04 16:08:17,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-04 16:08:17,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-04 16:08:17,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 16:08:17,230 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 16 treesize of output 15 [2024-06-04 16:08:17,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 164 treesize of output 140 [2024-06-04 16:08:17,367 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 69 treesize of output 55 [2024-06-04 16:08:17,401 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 59 treesize of output 43 [2024-06-04 16:08:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-06-04 16:08:17,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-04 16:08:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-06-04 16:08:18,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297848152] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-04 16:08:18,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-04 16:08:18,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 23 [2024-06-04 16:08:18,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619009336] [2024-06-04 16:08:18,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-04 16:08:18,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-04 16:08:18,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:18,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-04 16:08:18,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2024-06-04 16:08:18,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-06-04 16:08:18,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 482 transitions, 4771 flow. Second operand has 23 states, 23 states have (on average 7.043478260869565) internal successors, (162), 23 states have internal predecessors, (162), 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) [2024-06-04 16:08:18,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:18,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-06-04 16:08:18,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:20,842 INFO L124 PetriNetUnfolderBase]: 1469/2789 cut-off events. [2024-06-04 16:08:20,842 INFO L125 PetriNetUnfolderBase]: For 47220/47310 co-relation queries the response was YES. [2024-06-04 16:08:20,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18877 conditions, 2789 events. 1469/2789 cut-off events. For 47220/47310 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 15323 event pairs, 76 based on Foata normal form. 63/2821 useless extension candidates. Maximal degree in co-relation 18780. Up to 1279 conditions per place. [2024-06-04 16:08:20,870 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 498 selfloop transitions, 210 changer transitions 0/711 dead transitions. [2024-06-04 16:08:20,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 711 transitions, 8136 flow [2024-06-04 16:08:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-06-04 16:08:20,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-06-04 16:08:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 382 transitions. [2024-06-04 16:08:20,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2662020905923345 [2024-06-04 16:08:20,872 INFO L175 Difference]: Start difference. First operand has 253 places, 482 transitions, 4771 flow. Second operand 41 states and 382 transitions. [2024-06-04 16:08:20,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 711 transitions, 8136 flow [2024-06-04 16:08:21,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 711 transitions, 7972 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-04 16:08:21,034 INFO L231 Difference]: Finished difference. Result has 299 places, 553 transitions, 5986 flow [2024-06-04 16:08:21,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5986, PETRI_PLACES=299, PETRI_TRANSITIONS=553} [2024-06-04 16:08:21,035 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 265 predicate places. [2024-06-04 16:08:21,035 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 553 transitions, 5986 flow [2024-06-04 16:08:21,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.043478260869565) internal successors, (162), 23 states have internal predecessors, (162), 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) [2024-06-04 16:08:21,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:21,036 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:21,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-04 16:08:21,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-04 16:08:21,242 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:08:21,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:21,243 INFO L85 PathProgramCache]: Analyzing trace with hash -900027433, now seen corresponding path program 4 times [2024-06-04 16:08:21,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:21,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275182262] [2024-06-04 16:08:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:21,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:21,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:21,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275182262] [2024-06-04 16:08:21,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275182262] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:08:21,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832388747] [2024-06-04 16:08:21,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-04 16:08:21,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:08:21,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:08:21,514 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-04 16:08:21,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-04 16:08:21,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-04 16:08:21,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-04 16:08:21,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-04 16:08:21,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 16:08:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:21,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-04 16:08:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:22,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832388747] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-04 16:08:22,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-04 16:08:22,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2024-06-04 16:08:22,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694234450] [2024-06-04 16:08:22,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-04 16:08:22,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-04 16:08:22,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:22,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-04 16:08:22,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-06-04 16:08:22,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-06-04 16:08:22,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 553 transitions, 5986 flow. Second operand has 23 states, 23 states have (on average 9.478260869565217) internal successors, (218), 23 states have internal predecessors, (218), 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) [2024-06-04 16:08:22,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:22,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-06-04 16:08:22,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:23,244 INFO L124 PetriNetUnfolderBase]: 787/1725 cut-off events. [2024-06-04 16:08:23,244 INFO L125 PetriNetUnfolderBase]: For 36462/36480 co-relation queries the response was YES. [2024-06-04 16:08:23,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9859 conditions, 1725 events. 787/1725 cut-off events. For 36462/36480 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 9216 event pairs, 109 based on Foata normal form. 368/2083 useless extension candidates. Maximal degree in co-relation 9752. Up to 577 conditions per place. [2024-06-04 16:08:23,260 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 339 selfloop transitions, 136 changer transitions 0/480 dead transitions. [2024-06-04 16:08:23,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 480 transitions, 5453 flow [2024-06-04 16:08:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-04 16:08:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-04 16:08:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 347 transitions. [2024-06-04 16:08:23,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45064935064935063 [2024-06-04 16:08:23,261 INFO L175 Difference]: Start difference. First operand has 299 places, 553 transitions, 5986 flow. Second operand 22 states and 347 transitions. [2024-06-04 16:08:23,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 480 transitions, 5453 flow [2024-06-04 16:08:23,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 480 transitions, 4870 flow, removed 209 selfloop flow, removed 14 redundant places. [2024-06-04 16:08:23,356 INFO L231 Difference]: Finished difference. Result has 315 places, 401 transitions, 4018 flow [2024-06-04 16:08:23,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4018, PETRI_PLACES=315, PETRI_TRANSITIONS=401} [2024-06-04 16:08:23,357 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 281 predicate places. [2024-06-04 16:08:23,357 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 401 transitions, 4018 flow [2024-06-04 16:08:23,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.478260869565217) internal successors, (218), 23 states have internal predecessors, (218), 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) [2024-06-04 16:08:23,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:23,358 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:23,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-04 16:08:23,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-04 16:08:23,572 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:08:23,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:23,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1600866544, now seen corresponding path program 4 times [2024-06-04 16:08:23,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:23,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549308357] [2024-06-04 16:08:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:23,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:28,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:28,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549308357] [2024-06-04 16:08:28,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549308357] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:08:28,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593200243] [2024-06-04 16:08:28,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-04 16:08:28,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:08:28,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:08:28,582 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-04 16:08:28,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-04 16:08:29,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-04 16:08:29,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-04 16:08:29,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 67 conjunts are in the unsatisfiable core [2024-06-04 16:08:29,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 16:08:29,143 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 22 treesize of output 21 [2024-06-04 16:08:29,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 222 treesize of output 198 [2024-06-04 16:08:29,306 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 98 treesize of output 78 [2024-06-04 16:08:29,317 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-06-04 16:08:29,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 208 treesize of output 186 [2024-06-04 16:08:29,378 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 111 treesize of output 95 [2024-06-04 16:08:29,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 219 treesize of output 195 [2024-06-04 16:08:29,468 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 133 treesize of output 113 [2024-06-04 16:08:29,481 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-06-04 16:08:29,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 230 treesize of output 204 [2024-06-04 16:08:29,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 241 treesize of output 213 [2024-06-04 16:08:29,752 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 186 treesize of output 160 [2024-06-04 16:08:29,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 206 treesize of output 184 [2024-06-04 16:08:30,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 263 treesize of output 231 [2024-06-04 16:08:30,327 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-06-04 16:08:30,340 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 230 treesize of output 196 [2024-06-04 16:08:30,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 274 treesize of output 240 [2024-06-04 16:08:30,784 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 243 treesize of output 207 [2024-06-04 16:08:31,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 285 treesize of output 249 [2024-06-04 16:08:32,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 296 treesize of output 258 [2024-06-04 16:08:33,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 240 treesize of output 212 [2024-06-04 16:08:34,928 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 175 treesize of output 141 [2024-06-04 16:08:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:35,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-04 16:08:36,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 5 [2024-06-04 16:09:11,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-04 16:09:11,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5991 treesize of output 3863 [2024-06-04 16:10:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:23,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593200243] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-04 16:10:23,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-04 16:10:23,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2024-06-04 16:10:23,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984431134] [2024-06-04 16:10:23,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-04 16:10:23,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-06-04 16:10:23,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-06-04 16:10:23,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=1400, Unknown=2, NotChecked=0, Total=1892 [2024-06-04 16:10:26,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-06-04 16:10:26,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 401 transitions, 4018 flow. Second operand has 44 states, 44 states have (on average 7.568181818181818) internal successors, (333), 44 states have internal predecessors, (333), 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) [2024-06-04 16:10:26,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:26,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-06-04 16:10:26,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:34,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.96s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-04 16:11:38,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-04 16:11:52,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-04 16:12:04,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-04 16:12:16,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-04 16:12:21,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-04 16:13:10,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-04 16:13:15,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-04 16:13:30,109 INFO L124 PetriNetUnfolderBase]: 820/1777 cut-off events. [2024-06-04 16:13:30,109 INFO L125 PetriNetUnfolderBase]: For 38691/38693 co-relation queries the response was YES. [2024-06-04 16:13:30,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10352 conditions, 1777 events. 820/1777 cut-off events. For 38691/38693 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 9391 event pairs, 62 based on Foata normal form. 52/1829 useless extension candidates. Maximal degree in co-relation 10245. Up to 398 conditions per place. [2024-06-04 16:13:30,126 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 350 selfloop transitions, 199 changer transitions 0/552 dead transitions. [2024-06-04 16:13:30,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 552 transitions, 5879 flow [2024-06-04 16:13:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-06-04 16:13:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-06-04 16:13:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 538 transitions. [2024-06-04 16:13:30,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3341614906832298 [2024-06-04 16:13:30,129 INFO L175 Difference]: Start difference. First operand has 315 places, 401 transitions, 4018 flow. Second operand 46 states and 538 transitions. [2024-06-04 16:13:30,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 552 transitions, 5879 flow [2024-06-04 16:13:30,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 552 transitions, 5587 flow, removed 0 selfloop flow, removed 21 redundant places. [2024-06-04 16:13:30,207 INFO L231 Difference]: Finished difference. Result has 350 places, 423 transitions, 4392 flow [2024-06-04 16:13:30,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3746, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=4392, PETRI_PLACES=350, PETRI_TRANSITIONS=423} [2024-06-04 16:13:30,208 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 316 predicate places. [2024-06-04 16:13:30,208 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 423 transitions, 4392 flow [2024-06-04 16:13:30,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 7.568181818181818) internal successors, (333), 44 states have internal predecessors, (333), 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) [2024-06-04 16:13:30,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:30,208 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:30,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-04 16:13:30,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:13:30,423 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:13:30,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:30,424 INFO L85 PathProgramCache]: Analyzing trace with hash -845154400, now seen corresponding path program 5 times [2024-06-04 16:13:30,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:30,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510297284] [2024-06-04 16:13:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:30,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 190 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:31,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:31,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510297284] [2024-06-04 16:13:31,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510297284] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-04 16:13:31,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226544358] [2024-06-04 16:13:31,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-04 16:13:31,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 16:13:31,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:13:31,017 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-04 16:13:31,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process Killed by 15