./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/popl20-more-buffer-mult2.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/popl20-more-buffer-mult2.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:56:33,756 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:56:33,821 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:56:33,825 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:56:33,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:56:33,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:56:33,847 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:56:33,848 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:56:33,848 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:56:33,848 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:56:33,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:56:33,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:56:33,850 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:56:33,850 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:56:33,850 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:56:33,850 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:56:33,851 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:56:33,851 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:56:33,851 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:56:33,852 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:56:33,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:56:33,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:56:33,852 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:56:33,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:56:33,853 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:56:33,853 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:56:33,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:56:33,854 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:56:33,854 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:56:33,854 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:56:33,854 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:56:33,855 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:56:33,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:56:33,855 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:56:33,855 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:56:33,855 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:56:33,856 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:56:33,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:56:33,856 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:56:33,856 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:56:33,856 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:56:33,857 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:56:33,857 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:56:33,857 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 21:56:34,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:56:34,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:56:34,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:56:34,039 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:56:34,039 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:56:34,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/popl20-more-buffer-mult2.wvr.yml/witness.yml [2024-06-27 21:56:34,093 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:56:34,094 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:56:34,094 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2024-06-27 21:56:35,093 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:56:35,297 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:56:35,298 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2024-06-27 21:56:35,306 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a04cfcdd/2bf927a33b7c413c8b796d5000d25953/FLAGb5607d476 [2024-06-27 21:56:35,316 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a04cfcdd/2bf927a33b7c413c8b796d5000d25953 [2024-06-27 21:56:35,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:56:35,318 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:56:35,318 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:56:35,318 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:56:35,322 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:56:35,323 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:56:34" (1/2) ... [2024-06-27 21:56:35,323 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40331c0a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:56:35, skipping insertion in model container [2024-06-27 21:56:35,324 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:56:34" (1/2) ... [2024-06-27 21:56:35,325 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15abb6ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:56:35, skipping insertion in model container [2024-06-27 21:56:35,325 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:56:35" (2/2) ... [2024-06-27 21:56:35,325 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40331c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35, skipping insertion in model container [2024-06-27 21:56:35,325 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:56:35" (2/2) ... [2024-06-27 21:56:35,325 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:56:35,338 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:56:35,339 INFO L97 edCorrectnessWitness]: Location invariant before [L141-L141] ! multithreaded || ((((2147483648LL - (long long )i) + (long long )q1_back >= 0LL && (2147483648LL - (long long )j) + (long long )q2_back >= 0LL) && (2147483647LL + (long long )i) - (long long )q1_back >= 0LL) && (2147483647LL + (long long )j) - (long long )q2_back >= 0LL) [2024-06-27 21:56:35,340 INFO L97 edCorrectnessWitness]: Location invariant before [L140-L140] ! multithreaded || ((((2147483648LL - (long long )i) + (long long )q1_back >= 0LL && (2147483648LL - (long long )j) + (long long )q2_back >= 0LL) && (2147483647LL + (long long )i) - (long long )q1_back >= 0LL) && (2147483647LL + (long long )j) - (long long )q2_back >= 0LL) [2024-06-27 21:56:35,340 INFO L97 edCorrectnessWitness]: Location invariant before [L142-L142] ! multithreaded || ((((2147483648LL - (long long )i) + (long long )q1_back >= 0LL && (2147483648LL - (long long )j) + (long long )q2_back >= 0LL) && (2147483647LL + (long long )i) - (long long )q1_back >= 0LL) && (2147483647LL + (long long )j) - (long long )q2_back >= 0LL) [2024-06-27 21:56:35,340 INFO L97 edCorrectnessWitness]: Location invariant before [L139-L139] ! multithreaded || ((((2147483648LL - (long long )i) + (long long )q1_back >= 0LL && (2147483648LL - (long long )j) + (long long )q2_back >= 0LL) && (2147483647LL + (long long )i) - (long long )q1_back >= 0LL) && (2147483647LL + (long long )j) - (long long )q2_back >= 0LL) [2024-06-27 21:56:35,340 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:56:35,340 INFO L106 edCorrectnessWitness]: ghost_update [L138-L138] multithreaded = 1; [2024-06-27 21:56:35,356 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:56:35,495 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4151,4164] [2024-06-27 21:56:35,503 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:56:35,510 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:56:35,574 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4151,4164] [2024-06-27 21:56:35,577 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:56:35,590 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:56:35,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35 WrapperNode [2024-06-27 21:56:35,596 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:56:35,597 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:56:35,598 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:56:35,598 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:56:35,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (1/1) ... [2024-06-27 21:56:35,614 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (1/1) ... [2024-06-27 21:56:35,637 INFO L138 Inliner]: procedures = 26, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 299 [2024-06-27 21:56:35,637 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:56:35,638 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:56:35,638 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:56:35,638 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:56:35,647 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (1/1) ... [2024-06-27 21:56:35,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (1/1) ... [2024-06-27 21:56:35,651 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (1/1) ... [2024-06-27 21:56:35,668 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 21:56:35,669 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (1/1) ... [2024-06-27 21:56:35,669 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (1/1) ... [2024-06-27 21:56:35,676 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (1/1) ... [2024-06-27 21:56:35,679 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (1/1) ... [2024-06-27 21:56:35,681 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (1/1) ... [2024-06-27 21:56:35,682 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (1/1) ... [2024-06-27 21:56:35,684 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:56:35,685 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:56:35,685 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:56:35,685 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:56:35,686 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (1/1) ... [2024-06-27 21:56:35,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:56:35,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:56:35,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:56:35,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:56:35,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:56:35,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:56:35,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:56:35,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:56:35,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:56:35,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 21:56:35,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 21:56:35,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 21:56:35,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 21:56:35,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 21:56:35,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 21:56:35,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-06-27 21:56:35,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-06-27 21:56:35,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:56:35,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:56:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:56:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:56:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 21:56:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:56:35,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:56:35,741 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:56:35,845 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:56:35,847 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:56:36,188 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:56:36,188 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:56:36,494 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:56:36,494 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-06-27 21:56:36,495 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:56:36 BoogieIcfgContainer [2024-06-27 21:56:36,496 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:56:36,499 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:56:36,499 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:56:36,502 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:56:36,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:56:34" (1/4) ... [2024-06-27 21:56:36,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1d7d3a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:56:36, skipping insertion in model container [2024-06-27 21:56:36,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:56:35" (2/4) ... [2024-06-27 21:56:36,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1d7d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:56:36, skipping insertion in model container [2024-06-27 21:56:36,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:35" (3/4) ... [2024-06-27 21:56:36,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1d7d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:56:36, skipping insertion in model container [2024-06-27 21:56:36,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:56:36" (4/4) ... [2024-06-27 21:56:36,507 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2024-06-27 21:56:36,523 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:56:36,523 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 21:56:36,523 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:56:36,573 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-06-27 21:56:36,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 57 transitions, 142 flow [2024-06-27 21:56:36,630 INFO L124 PetriNetUnfolderBase]: 6/53 cut-off events. [2024-06-27 21:56:36,631 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 21:56:36,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 53 events. 6/53 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 21:56:36,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 57 transitions, 142 flow [2024-06-27 21:56:36,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 52 transitions, 128 flow [2024-06-27 21:56:36,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:56:36,654 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;@191c63d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:56:36,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 21:56:36,658 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:56:36,662 INFO L124 PetriNetUnfolderBase]: 2/9 cut-off events. [2024-06-27 21:56:36,662 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:56:36,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:36,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:36,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:56:36,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash -472312563, now seen corresponding path program 1 times [2024-06-27 21:56:36,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:36,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520779702] [2024-06-27 21:56:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:36,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:36,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520779702] [2024-06-27 21:56:36,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520779702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:36,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:36,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:56:36,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442053509] [2024-06-27 21:56:36,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:36,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:56:36,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:36,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:56:36,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:56:37,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 57 [2024-06-27 21:56:37,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:37,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:37,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 57 [2024-06-27 21:56:37,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:37,445 INFO L124 PetriNetUnfolderBase]: 1639/2613 cut-off events. [2024-06-27 21:56:37,446 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2024-06-27 21:56:37,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4973 conditions, 2613 events. 1639/2613 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15298 event pairs, 308 based on Foata normal form. 36/2498 useless extension candidates. Maximal degree in co-relation 4431. Up to 1760 conditions per place. [2024-06-27 21:56:37,471 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 53 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2024-06-27 21:56:37,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 75 transitions, 307 flow [2024-06-27 21:56:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:56:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:56:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-06-27 21:56:37,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7543859649122807 [2024-06-27 21:56:37,485 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 128 flow. Second operand 3 states and 129 transitions. [2024-06-27 21:56:37,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 75 transitions, 307 flow [2024-06-27 21:56:37,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 277 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 21:56:37,495 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 137 flow [2024-06-27 21:56:37,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2024-06-27 21:56:37,501 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2024-06-27 21:56:37,501 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 137 flow [2024-06-27 21:56:37,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:37,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:37,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:37,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:56:37,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:56:37,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2061913834, now seen corresponding path program 1 times [2024-06-27 21:56:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:37,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144893621] [2024-06-27 21:56:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:37,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:37,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144893621] [2024-06-27 21:56:37,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144893621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:37,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:37,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:56:37,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238317470] [2024-06-27 21:56:37,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:37,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:56:37,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:56:37,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:56:37,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 21:56:37,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:37,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:37,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 21:56:37,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:37,938 INFO L124 PetriNetUnfolderBase]: 1715/2938 cut-off events. [2024-06-27 21:56:37,939 INFO L125 PetriNetUnfolderBase]: For 774/786 co-relation queries the response was YES. [2024-06-27 21:56:37,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6268 conditions, 2938 events. 1715/2938 cut-off events. For 774/786 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20027 event pairs, 1206 based on Foata normal form. 177/2919 useless extension candidates. Maximal degree in co-relation 1961. Up to 1665 conditions per place. [2024-06-27 21:56:37,959 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 54 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2024-06-27 21:56:37,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 81 transitions, 320 flow [2024-06-27 21:56:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:56:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:56:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2024-06-27 21:56:37,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6736842105263158 [2024-06-27 21:56:37,962 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 137 flow. Second operand 5 states and 192 transitions. [2024-06-27 21:56:37,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 81 transitions, 320 flow [2024-06-27 21:56:37,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 81 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:56:37,964 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 166 flow [2024-06-27 21:56:37,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-27 21:56:37,965 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2024-06-27 21:56:37,965 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 166 flow [2024-06-27 21:56:37,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:37,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:37,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:37,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:56:37,966 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:56:37,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1973918061, now seen corresponding path program 1 times [2024-06-27 21:56:37,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:37,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634076075] [2024-06-27 21:56:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:37,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:38,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:38,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634076075] [2024-06-27 21:56:38,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634076075] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:56:38,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362857607] [2024-06-27 21:56:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:38,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:38,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:56:38,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:56:38,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 21:56:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:38,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 21:56:38,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:56:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:56:38,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:56:38,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362857607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:38,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 21:56:38,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2024-06-27 21:56:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595023777] [2024-06-27 21:56:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:38,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:56:38,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:38,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:56:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:56:38,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 57 [2024-06-27 21:56:38,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:38,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:38,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 57 [2024-06-27 21:56:38,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:38,902 INFO L124 PetriNetUnfolderBase]: 2534/4220 cut-off events. [2024-06-27 21:56:38,902 INFO L125 PetriNetUnfolderBase]: For 1547/1715 co-relation queries the response was YES. [2024-06-27 21:56:38,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9340 conditions, 4220 events. 2534/4220 cut-off events. For 1547/1715 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28399 event pairs, 474 based on Foata normal form. 54/4099 useless extension candidates. Maximal degree in co-relation 7450. Up to 2311 conditions per place. [2024-06-27 21:56:38,931 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 77 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2024-06-27 21:56:38,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 101 transitions, 442 flow [2024-06-27 21:56:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:56:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:56:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 175 transitions. [2024-06-27 21:56:38,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7675438596491229 [2024-06-27 21:56:38,935 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 166 flow. Second operand 4 states and 175 transitions. [2024-06-27 21:56:38,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 101 transitions, 442 flow [2024-06-27 21:56:38,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 101 transitions, 438 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 21:56:38,939 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 197 flow [2024-06-27 21:56:38,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-27 21:56:38,941 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 4 predicate places. [2024-06-27 21:56:38,941 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 197 flow [2024-06-27 21:56:38,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:38,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:38,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:38,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 21:56:39,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:39,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:56:39,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:39,157 INFO L85 PathProgramCache]: Analyzing trace with hash -770728714, now seen corresponding path program 1 times [2024-06-27 21:56:39,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:39,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491679394] [2024-06-27 21:56:39,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:39,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:39,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:39,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491679394] [2024-06-27 21:56:39,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491679394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:39,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:39,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:56:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575032256] [2024-06-27 21:56:39,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:39,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:56:39,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:39,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:56:39,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:56:39,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 21:56:39,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:39,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:39,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 21:56:39,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:39,689 INFO L124 PetriNetUnfolderBase]: 2970/5260 cut-off events. [2024-06-27 21:56:39,690 INFO L125 PetriNetUnfolderBase]: For 5560/5618 co-relation queries the response was YES. [2024-06-27 21:56:39,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12784 conditions, 5260 events. 2970/5260 cut-off events. For 5560/5618 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 40764 event pairs, 2279 based on Foata normal form. 253/5168 useless extension candidates. Maximal degree in co-relation 10436. Up to 2865 conditions per place. [2024-06-27 21:56:39,722 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 58 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2024-06-27 21:56:39,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 413 flow [2024-06-27 21:56:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:56:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:56:39,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2024-06-27 21:56:39,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7149122807017544 [2024-06-27 21:56:39,740 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 197 flow. Second operand 4 states and 163 transitions. [2024-06-27 21:56:39,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 413 flow [2024-06-27 21:56:39,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 86 transitions, 398 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 21:56:39,744 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 229 flow [2024-06-27 21:56:39,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-27 21:56:39,745 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2024-06-27 21:56:39,745 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 229 flow [2024-06-27 21:56:39,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:39,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:39,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:39,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:56:39,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:56:39,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:39,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1386733971, now seen corresponding path program 1 times [2024-06-27 21:56:39,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:39,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874040464] [2024-06-27 21:56:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:39,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:39,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:39,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874040464] [2024-06-27 21:56:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874040464] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:56:39,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860522405] [2024-06-27 21:56:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:39,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:39,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:56:39,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:56:39,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 21:56:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:39,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 21:56:39,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:56:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:56:40,122 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:56:40,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860522405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:40,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 21:56:40,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2024-06-27 21:56:40,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51313861] [2024-06-27 21:56:40,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:40,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:56:40,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:40,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:56:40,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:56:40,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 21:56:40,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:40,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:40,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 21:56:40,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:40,852 INFO L124 PetriNetUnfolderBase]: 5401/8780 cut-off events. [2024-06-27 21:56:40,853 INFO L125 PetriNetUnfolderBase]: For 8532/8776 co-relation queries the response was YES. [2024-06-27 21:56:40,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21926 conditions, 8780 events. 5401/8780 cut-off events. For 8532/8776 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 65819 event pairs, 1632 based on Foata normal form. 206/8491 useless extension candidates. Maximal degree in co-relation 17599. Up to 3749 conditions per place. [2024-06-27 21:56:40,967 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 84 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2024-06-27 21:56:40,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 108 transitions, 563 flow [2024-06-27 21:56:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:56:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:56:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-06-27 21:56:40,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:56:40,969 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 229 flow. Second operand 5 states and 190 transitions. [2024-06-27 21:56:40,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 108 transitions, 563 flow [2024-06-27 21:56:40,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 108 transitions, 558 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 21:56:40,973 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 278 flow [2024-06-27 21:56:40,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2024-06-27 21:56:40,974 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 12 predicate places. [2024-06-27 21:56:40,974 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 278 flow [2024-06-27 21:56:40,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:40,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:40,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:40,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 21:56:41,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:41,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:56:41,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1732296734, now seen corresponding path program 1 times [2024-06-27 21:56:41,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:41,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474468425] [2024-06-27 21:56:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:41,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:41,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:41,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474468425] [2024-06-27 21:56:41,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474468425] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:56:41,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742372454] [2024-06-27 21:56:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:41,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:56:41,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:56:41,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 21:56:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:41,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 21:56:41,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:56:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:41,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:56:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:41,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742372454] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:56:41,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:56:41,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-06-27 21:56:41,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81880868] [2024-06-27 21:56:41,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:56:41,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:56:41,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:41,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:56:41,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:56:41,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 21:56:41,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 278 flow. Second operand has 12 states, 12 states have (on average 28.5) internal successors, (342), 12 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:41,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:41,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 21:56:41,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:42,768 INFO L124 PetriNetUnfolderBase]: 7389/12796 cut-off events. [2024-06-27 21:56:42,768 INFO L125 PetriNetUnfolderBase]: For 19522/19678 co-relation queries the response was YES. [2024-06-27 21:56:42,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32755 conditions, 12796 events. 7389/12796 cut-off events. For 19522/19678 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 107358 event pairs, 3964 based on Foata normal form. 412/12586 useless extension candidates. Maximal degree in co-relation 14643. Up to 4437 conditions per place. [2024-06-27 21:56:42,853 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 112 selfloop transitions, 15 changer transitions 0/150 dead transitions. [2024-06-27 21:56:42,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 150 transitions, 869 flow [2024-06-27 21:56:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:56:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:56:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 407 transitions. [2024-06-27 21:56:42,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6491228070175439 [2024-06-27 21:56:42,855 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 278 flow. Second operand 11 states and 407 transitions. [2024-06-27 21:56:42,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 150 transitions, 869 flow [2024-06-27 21:56:42,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 150 transitions, 864 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:56:42,865 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 408 flow [2024-06-27 21:56:42,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=408, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2024-06-27 21:56:42,866 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 27 predicate places. [2024-06-27 21:56:42,866 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 408 flow [2024-06-27 21:56:42,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.5) internal successors, (342), 12 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:42,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:42,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:42,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 21:56:43,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:43,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:56:43,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:43,090 INFO L85 PathProgramCache]: Analyzing trace with hash -517413663, now seen corresponding path program 2 times [2024-06-27 21:56:43,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:43,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724259451] [2024-06-27 21:56:43,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:43,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:43,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:43,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724259451] [2024-06-27 21:56:43,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724259451] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:56:43,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38873595] [2024-06-27 21:56:43,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:56:43,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:56:43,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:56:43,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 21:56:43,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:56:43,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:56:43,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2024-06-27 21:56:43,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:56:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:56:43,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:56:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:56:43,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38873595] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 21:56:43,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 21:56:43,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 3] total 11 [2024-06-27 21:56:43,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055244061] [2024-06-27 21:56:43,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:43,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:56:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:43,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:56:43,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-27 21:56:43,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 57 [2024-06-27 21:56:43,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 408 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:43,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:43,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 57 [2024-06-27 21:56:43,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:44,722 INFO L124 PetriNetUnfolderBase]: 6839/11618 cut-off events. [2024-06-27 21:56:44,722 INFO L125 PetriNetUnfolderBase]: For 24839/24839 co-relation queries the response was YES. [2024-06-27 21:56:44,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31699 conditions, 11618 events. 6839/11618 cut-off events. For 24839/24839 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 97217 event pairs, 5397 based on Foata normal form. 222/10926 useless extension candidates. Maximal degree in co-relation 28794. Up to 9560 conditions per place. [2024-06-27 21:56:44,794 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 50 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2024-06-27 21:56:44,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 70 transitions, 474 flow [2024-06-27 21:56:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:56:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:56:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-27 21:56:44,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-06-27 21:56:44,796 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 408 flow. Second operand 3 states and 102 transitions. [2024-06-27 21:56:44,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 70 transitions, 474 flow [2024-06-27 21:56:44,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 70 transitions, 433 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:56:44,804 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 333 flow [2024-06-27 21:56:44,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=333, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2024-06-27 21:56:44,805 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 20 predicate places. [2024-06-27 21:56:44,805 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 333 flow [2024-06-27 21:56:44,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:44,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:44,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:44,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-06-27 21:56:45,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:45,017 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:56:45,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:45,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1496392241, now seen corresponding path program 1 times [2024-06-27 21:56:45,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:45,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172717193] [2024-06-27 21:56:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:45,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:45,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:45,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172717193] [2024-06-27 21:56:45,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172717193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:45,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:45,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:56:45,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701825129] [2024-06-27 21:56:45,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:45,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:56:45,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:45,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:56:45,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:56:45,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 21:56:45,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:45,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:45,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 21:56:45,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:46,438 INFO L124 PetriNetUnfolderBase]: 10016/16919 cut-off events. [2024-06-27 21:56:46,439 INFO L125 PetriNetUnfolderBase]: For 26514/26514 co-relation queries the response was YES. [2024-06-27 21:56:46,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43786 conditions, 16919 events. 10016/16919 cut-off events. For 26514/26514 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 139195 event pairs, 2944 based on Foata normal form. 20/16200 useless extension candidates. Maximal degree in co-relation 43763. Up to 8353 conditions per place. [2024-06-27 21:56:46,559 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 70 selfloop transitions, 4 changer transitions 2/95 dead transitions. [2024-06-27 21:56:46,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 95 transitions, 628 flow [2024-06-27 21:56:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:56:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:56:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-06-27 21:56:46,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7426900584795322 [2024-06-27 21:56:46,561 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 333 flow. Second operand 3 states and 127 transitions. [2024-06-27 21:56:46,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 95 transitions, 628 flow [2024-06-27 21:56:46,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 95 transitions, 627 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:56:46,570 INFO L231 Difference]: Finished difference. Result has 81 places, 72 transitions, 356 flow [2024-06-27 21:56:46,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2024-06-27 21:56:46,571 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 22 predicate places. [2024-06-27 21:56:46,571 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 356 flow [2024-06-27 21:56:46,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:46,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:46,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:46,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:56:46,572 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:56:46,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:46,572 INFO L85 PathProgramCache]: Analyzing trace with hash -687594129, now seen corresponding path program 1 times [2024-06-27 21:56:46,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:46,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006571061] [2024-06-27 21:56:46,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:46,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:56:46,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:46,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006571061] [2024-06-27 21:56:46,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006571061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:46,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:46,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:56:46,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464151147] [2024-06-27 21:56:46,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:46,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:56:46,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:46,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:56:46,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:56:46,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 21:56:46,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:46,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:46,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 21:56:46,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:47,636 INFO L124 PetriNetUnfolderBase]: 8485/14289 cut-off events. [2024-06-27 21:56:47,636 INFO L125 PetriNetUnfolderBase]: For 29087/29087 co-relation queries the response was YES. [2024-06-27 21:56:47,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39834 conditions, 14289 events. 8485/14289 cut-off events. For 29087/29087 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 115074 event pairs, 3448 based on Foata normal form. 340/14175 useless extension candidates. Maximal degree in co-relation 39809. Up to 7598 conditions per place. [2024-06-27 21:56:47,894 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 70 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2024-06-27 21:56:47,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 94 transitions, 582 flow [2024-06-27 21:56:47,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:56:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:56:47,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2024-06-27 21:56:47,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2024-06-27 21:56:47,895 INFO L175 Difference]: Start difference. First operand has 81 places, 72 transitions, 356 flow. Second operand 3 states and 133 transitions. [2024-06-27 21:56:47,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 94 transitions, 582 flow [2024-06-27 21:56:47,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 94 transitions, 576 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 21:56:47,914 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 367 flow [2024-06-27 21:56:47,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=367, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2024-06-27 21:56:47,916 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 24 predicate places. [2024-06-27 21:56:47,918 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 367 flow [2024-06-27 21:56:47,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:47,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:47,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:47,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:56:47,919 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:56:47,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:47,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1628504525, now seen corresponding path program 1 times [2024-06-27 21:56:47,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:47,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136629282] [2024-06-27 21:56:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:47,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:56:48,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:48,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136629282] [2024-06-27 21:56:48,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136629282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:48,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:48,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:56:48,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38785481] [2024-06-27 21:56:48,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:48,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:56:48,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:48,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:56:48,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:56:48,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 21:56:48,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 367 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:48,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:48,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 21:56:48,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:48,978 INFO L124 PetriNetUnfolderBase]: 7368/12802 cut-off events. [2024-06-27 21:56:48,978 INFO L125 PetriNetUnfolderBase]: For 30660/30660 co-relation queries the response was YES. [2024-06-27 21:56:48,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36257 conditions, 12802 events. 7368/12802 cut-off events. For 30660/30660 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 104959 event pairs, 2725 based on Foata normal form. 99/12446 useless extension candidates. Maximal degree in co-relation 36230. Up to 6247 conditions per place. [2024-06-27 21:56:49,035 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 67 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2024-06-27 21:56:49,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 90 transitions, 583 flow [2024-06-27 21:56:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:56:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:56:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-06-27 21:56:49,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7602339181286549 [2024-06-27 21:56:49,037 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 367 flow. Second operand 3 states and 130 transitions. [2024-06-27 21:56:49,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 90 transitions, 583 flow [2024-06-27 21:56:49,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 90 transitions, 564 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 21:56:49,044 INFO L231 Difference]: Finished difference. Result has 85 places, 71 transitions, 370 flow [2024-06-27 21:56:49,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=370, PETRI_PLACES=85, PETRI_TRANSITIONS=71} [2024-06-27 21:56:49,044 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 26 predicate places. [2024-06-27 21:56:49,045 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 71 transitions, 370 flow [2024-06-27 21:56:49,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:49,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:49,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:49,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:56:49,045 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:56:49,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:49,046 INFO L85 PathProgramCache]: Analyzing trace with hash -396239142, now seen corresponding path program 1 times [2024-06-27 21:56:49,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:49,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305761183] [2024-06-27 21:56:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:49,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:56:49,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:49,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305761183] [2024-06-27 21:56:49,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305761183] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:56:49,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105104084] [2024-06-27 21:56:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:49,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:49,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:56:49,330 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:56:49,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 21:56:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:49,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 21:56:49,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:56:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:56:49,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:56:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:56:49,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105104084] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 21:56:49,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 21:56:49,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 5] total 16 [2024-06-27 21:56:49,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405896783] [2024-06-27 21:56:49,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:49,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:49,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:49,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:49,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-06-27 21:56:49,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2024-06-27 21:56:49,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 71 transitions, 370 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:49,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:49,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2024-06-27 21:56:49,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:57,651 INFO L124 PetriNetUnfolderBase]: 71260/99698 cut-off events. [2024-06-27 21:56:57,651 INFO L125 PetriNetUnfolderBase]: For 127443/127983 co-relation queries the response was YES. [2024-06-27 21:56:57,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264211 conditions, 99698 events. 71260/99698 cut-off events. For 127443/127983 co-relation queries the response was YES. Maximal size of possible extension queue 4130. Compared 726372 event pairs, 3334 based on Foata normal form. 60/82832 useless extension candidates. Maximal degree in co-relation 264182. Up to 13468 conditions per place. [2024-06-27 21:56:58,217 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 373 selfloop transitions, 64 changer transitions 5/452 dead transitions. [2024-06-27 21:56:58,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 452 transitions, 2551 flow [2024-06-27 21:56:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 21:56:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 21:56:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 813 transitions. [2024-06-27 21:56:58,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.620137299771167 [2024-06-27 21:56:58,221 INFO L175 Difference]: Start difference. First operand has 85 places, 71 transitions, 370 flow. Second operand 23 states and 813 transitions. [2024-06-27 21:56:58,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 452 transitions, 2551 flow [2024-06-27 21:56:58,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 452 transitions, 2535 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 21:56:58,270 INFO L231 Difference]: Finished difference. Result has 124 places, 129 transitions, 964 flow [2024-06-27 21:56:58,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=964, PETRI_PLACES=124, PETRI_TRANSITIONS=129} [2024-06-27 21:56:58,271 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 65 predicate places. [2024-06-27 21:56:58,271 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 129 transitions, 964 flow [2024-06-27 21:56:58,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:58,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:58,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:58,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 21:56:58,482 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,SelfDestructingSolverStorable10 [2024-06-27 21:56:58,483 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:56:58,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:58,483 INFO L85 PathProgramCache]: Analyzing trace with hash 777203188, now seen corresponding path program 2 times [2024-06-27 21:56:58,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:58,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621576942] [2024-06-27 21:56:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:58,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:56:58,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:58,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621576942] [2024-06-27 21:56:58,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621576942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:58,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:58,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:56:58,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83120277] [2024-06-27 21:56:58,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:58,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:56:58,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:58,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:56:58,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:56:58,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 21:56:58,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 129 transitions, 964 flow. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:58,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:58,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 21:56:58,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:07,263 INFO L124 PetriNetUnfolderBase]: 50670/76954 cut-off events. [2024-06-27 21:57:07,263 INFO L125 PetriNetUnfolderBase]: For 388465/390104 co-relation queries the response was YES. [2024-06-27 21:57:07,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302990 conditions, 76954 events. 50670/76954 cut-off events. For 388465/390104 co-relation queries the response was YES. Maximal size of possible extension queue 3456. Compared 639678 event pairs, 8850 based on Foata normal form. 107/76208 useless extension candidates. Maximal degree in co-relation 302942. Up to 60635 conditions per place. [2024-06-27 21:57:07,979 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 148 selfloop transitions, 24 changer transitions 12/201 dead transitions. [2024-06-27 21:57:07,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 201 transitions, 1757 flow [2024-06-27 21:57:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:57:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:57:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2024-06-27 21:57:07,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 21:57:07,981 INFO L175 Difference]: Start difference. First operand has 124 places, 129 transitions, 964 flow. Second operand 6 states and 228 transitions. [2024-06-27 21:57:07,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 201 transitions, 1757 flow [2024-06-27 21:57:13,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 201 transitions, 1645 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 21:57:13,224 INFO L231 Difference]: Finished difference. Result has 129 places, 142 transitions, 1101 flow [2024-06-27 21:57:13,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1101, PETRI_PLACES=129, PETRI_TRANSITIONS=142} [2024-06-27 21:57:13,227 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 70 predicate places. [2024-06-27 21:57:13,227 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 142 transitions, 1101 flow [2024-06-27 21:57:13,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:13,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:13,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:13,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:57:13,229 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:57:13,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:13,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1699702200, now seen corresponding path program 3 times [2024-06-27 21:57:13,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:13,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54846749] [2024-06-27 21:57:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:13,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:57:13,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:13,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54846749] [2024-06-27 21:57:13,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54846749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:13,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:13,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:57:13,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982971135] [2024-06-27 21:57:13,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:13,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:57:13,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:13,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:57:13,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:57:13,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 57 [2024-06-27 21:57:13,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 142 transitions, 1101 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 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) [2024-06-27 21:57:13,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:13,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 57 [2024-06-27 21:57:13,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:23,499 INFO L124 PetriNetUnfolderBase]: 55596/85678 cut-off events. [2024-06-27 21:57:23,499 INFO L125 PetriNetUnfolderBase]: For 499332/502182 co-relation queries the response was YES. [2024-06-27 21:57:24,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367837 conditions, 85678 events. 55596/85678 cut-off events. For 499332/502182 co-relation queries the response was YES. Maximal size of possible extension queue 4284. Compared 747173 event pairs, 12307 based on Foata normal form. 942/85532 useless extension candidates. Maximal degree in co-relation 367787. Up to 53257 conditions per place. [2024-06-27 21:57:24,356 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 180 selfloop transitions, 93 changer transitions 4/308 dead transitions. [2024-06-27 21:57:24,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 308 transitions, 3081 flow [2024-06-27 21:57:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:57:24,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:57:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 309 transitions. [2024-06-27 21:57:24,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776315789473685 [2024-06-27 21:57:24,357 INFO L175 Difference]: Start difference. First operand has 129 places, 142 transitions, 1101 flow. Second operand 8 states and 309 transitions. [2024-06-27 21:57:24,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 308 transitions, 3081 flow [2024-06-27 21:57:29,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 308 transitions, 3024 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 21:57:29,795 INFO L231 Difference]: Finished difference. Result has 140 places, 215 transitions, 2312 flow [2024-06-27 21:57:29,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2312, PETRI_PLACES=140, PETRI_TRANSITIONS=215} [2024-06-27 21:57:29,796 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 81 predicate places. [2024-06-27 21:57:29,796 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 215 transitions, 2312 flow [2024-06-27 21:57:29,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 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) [2024-06-27 21:57:29,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:29,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:29,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:57:29,797 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 21:57:29,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2050470142, now seen corresponding path program 4 times [2024-06-27 21:57:29,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:29,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201611709] [2024-06-27 21:57:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:29,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:57:30,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:30,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201611709] [2024-06-27 21:57:30,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201611709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:30,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:30,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:57:30,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097897074] [2024-06-27 21:57:30,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:30,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:57:30,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:30,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:57:30,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:57:30,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 21:57:30,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 215 transitions, 2312 flow. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:30,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:30,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 21:57:30,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand