./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/parallel-lamport.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/parallel-lamport.wvr.c ./goblint.2024-05-07_14-17-48.files/protection/parallel-lamport.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-wip.fs.witness-ghost-b44c828-m [2024-05-12 12:53:13,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:53:13,727 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:53:13,730 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:53:13,731 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:53:13,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:53:13,755 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:53:13,755 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:53:13,756 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:53:13,759 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:53:13,759 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:53:13,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:53:13,760 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:53:13,761 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:53:13,762 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:53:13,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:53:13,762 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:53:13,762 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:53:13,762 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:53:13,763 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:53:13,764 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:53:13,764 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:53:13,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:53:13,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:53:13,765 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:53:13,765 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:53:13,765 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:53:13,765 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:53:13,766 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:53:13,766 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:53:13,767 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:53:13,767 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:53:13,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:53:13,767 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:53:13,767 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:53:13,767 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:53:13,768 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:53:13,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:53:13,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:53:13,768 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:53:13,768 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:53:13,769 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:53:13,769 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:53:13,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:53:13,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:53:14,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:53:14,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:53:14,022 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:53:14,022 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:53:14,023 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2024-05-12 12:53:15,422 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:53:15,587 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:53:15,587 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2024-05-12 12:53:15,594 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40bd6b0f0/27d179982af34f6082fad46e80d74038/FLAGa3d0e8886 [2024-05-12 12:53:15,604 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40bd6b0f0/27d179982af34f6082fad46e80d74038 [2024-05-12 12:53:15,606 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:53:15,606 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:53:15,607 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/parallel-lamport.wvr.yml/witness.yml [2024-05-12 12:53:15,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:53:15,661 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:53:15,662 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:53:15,662 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:53:15,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:53:15,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:53:15" (1/2) ... [2024-05-12 12:53:15,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7034ab8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:53:15, skipping insertion in model container [2024-05-12 12:53:15,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:53:15" (1/2) ... [2024-05-12 12:53:15,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f79395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:53:15, skipping insertion in model container [2024-05-12 12:53:15,668 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:53:15" (2/2) ... [2024-05-12 12:53:15,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7034ab8a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15, skipping insertion in model container [2024-05-12 12:53:15,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:53:15" (2/2) ... [2024-05-12 12:53:15,669 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:53:15,680 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:53:15,681 INFO L97 edCorrectnessWitness]: Location invariant before [L155-L155] (! multithreaded || -2147483647 <= n2) && (! multithreaded || -2147483647 <= n1) [2024-05-12 12:53:15,681 INFO L97 edCorrectnessWitness]: Location invariant before [L154-L154] (! multithreaded || -2147483647 <= n2) && (! multithreaded || -2147483647 <= n1) [2024-05-12 12:53:15,681 INFO L97 edCorrectnessWitness]: Location invariant before [L156-L156] (! multithreaded || -2147483647 <= n2) && (! multithreaded || -2147483647 <= n1) [2024-05-12 12:53:15,681 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:53:15,681 INFO L106 edCorrectnessWitness]: ghost_update [L153-L153] multithreaded = 1; [2024-05-12 12:53:15,696 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:53:15,844 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c[4210,4223] [2024-05-12 12:53:15,858 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:53:15,864 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:53:15,942 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c[4210,4223] [2024-05-12 12:53:15,948 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:53:15,965 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:53:15,966 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15 WrapperNode [2024-05-12 12:53:15,966 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:53:15,967 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:53:15,967 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:53:15,967 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:53:15,973 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (1/1) ... [2024-05-12 12:53:15,991 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (1/1) ... [2024-05-12 12:53:16,017 INFO L138 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 249 [2024-05-12 12:53:16,020 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:53:16,021 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:53:16,022 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:53:16,022 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:53:16,030 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (1/1) ... [2024-05-12 12:53:16,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (1/1) ... [2024-05-12 12:53:16,043 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (1/1) ... [2024-05-12 12:53:16,071 INFO L175 MemorySlicer]: Split 13 memory accesses to 5 slices as follows [2, 2, 2, 5, 2]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-05-12 12:53:16,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (1/1) ... [2024-05-12 12:53:16,073 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (1/1) ... [2024-05-12 12:53:16,078 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (1/1) ... [2024-05-12 12:53:16,089 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (1/1) ... [2024-05-12 12:53:16,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (1/1) ... [2024-05-12 12:53:16,098 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (1/1) ... [2024-05-12 12:53:16,100 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:53:16,111 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:53:16,112 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:53:16,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:53:16,112 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (1/1) ... [2024-05-12 12:53:16,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:53:16,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:53:16,158 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) [2024-05-12 12:53:16,175 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 [2024-05-12 12:53:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:53:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:53:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:53:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:53:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:53:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 12:53:16,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-05-12 12:53:16,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 12:53:16,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 12:53:16,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 12:53:16,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-05-12 12:53:16,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-05-12 12:53:16,192 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-05-12 12:53:16,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-05-12 12:53:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-05-12 12:53:16,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-05-12 12:53:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-05-12 12:53:16,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-05-12 12:53:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:53:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:53:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:53:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 12:53:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-05-12 12:53:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:53:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:53:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-05-12 12:53:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:53:16,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:53:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:53:16,197 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:53:16,315 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:53:16,317 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:53:16,629 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:53:16,629 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:53:16,822 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:53:16,822 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-05-12 12:53:16,823 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:53:16 BoogieIcfgContainer [2024-05-12 12:53:16,823 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:53:16,824 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:53:16,825 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:53:16,827 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:53:16,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:53:15" (1/4) ... [2024-05-12 12:53:16,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aba15ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:53:16, skipping insertion in model container [2024-05-12 12:53:16,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:53:15" (2/4) ... [2024-05-12 12:53:16,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aba15ff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:53:16, skipping insertion in model container [2024-05-12 12:53:16,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:53:15" (3/4) ... [2024-05-12 12:53:16,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aba15ff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:53:16, skipping insertion in model container [2024-05-12 12:53:16,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:53:16" (4/4) ... [2024-05-12 12:53:16,830 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2024-05-12 12:53:16,845 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:53:16,845 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 12:53:16,845 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:53:16,875 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-05-12 12:53:16,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 54 transitions, 129 flow [2024-05-12 12:53:16,937 INFO L124 PetriNetUnfolderBase]: 1/51 cut-off events. [2024-05-12 12:53:16,937 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-05-12 12:53:16,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 51 events. 1/51 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-05-12 12:53:16,939 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 54 transitions, 129 flow [2024-05-12 12:53:16,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 50 transitions, 118 flow [2024-05-12 12:53:16,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:53:16,954 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;@6e404004, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:53:16,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 12:53:16,958 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:53:16,958 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2024-05-12 12:53:16,959 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:53:16,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:16,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:16,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:16,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:16,964 INFO L85 PathProgramCache]: Analyzing trace with hash 544633776, now seen corresponding path program 1 times [2024-05-12 12:53:16,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:16,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057471471] [2024-05-12 12:53:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:16,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:17,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:17,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057471471] [2024-05-12 12:53:17,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057471471] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:17,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:17,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:53:17,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037686109] [2024-05-12 12:53:17,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:17,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:53:17,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:53:17,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:53:17,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-05-12 12:53:17,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2024-05-12 12:53:17,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:17,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-05-12 12:53:17,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:17,864 INFO L124 PetriNetUnfolderBase]: 2688/4471 cut-off events. [2024-05-12 12:53:17,864 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2024-05-12 12:53:17,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8602 conditions, 4471 events. 2688/4471 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 27259 event pairs, 1069 based on Foata normal form. 0/4154 useless extension candidates. Maximal degree in co-relation 8411. Up to 3938 conditions per place. [2024-05-12 12:53:17,897 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 50 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-05-12 12:53:17,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 258 flow [2024-05-12 12:53:17,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:53:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:53:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-05-12 12:53:17,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-05-12 12:53:17,910 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 118 flow. Second operand 3 states and 98 transitions. [2024-05-12 12:53:17,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 258 flow [2024-05-12 12:53:17,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 64 transitions, 242 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 12:53:17,922 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 129 flow [2024-05-12 12:53:17,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-05-12 12:53:17,928 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2024-05-12 12:53:17,929 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 129 flow [2024-05-12 12:53:17,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2024-05-12 12:53:17,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:17,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:17,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:53:17,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:17,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:17,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1199980027, now seen corresponding path program 1 times [2024-05-12 12:53:17,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:17,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606269007] [2024-05-12 12:53:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:17,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:18,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:18,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606269007] [2024-05-12 12:53:18,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606269007] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:18,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:18,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:53:18,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117218771] [2024-05-12 12:53:18,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:18,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:18,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:53:18,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-05-12 12:53:18,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2024-05-12 12:53:18,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:18,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-05-12 12:53:18,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:18,731 INFO L124 PetriNetUnfolderBase]: 4575/7204 cut-off events. [2024-05-12 12:53:18,732 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2024-05-12 12:53:18,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15015 conditions, 7204 events. 4575/7204 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 42593 event pairs, 1021 based on Foata normal form. 95/7296 useless extension candidates. Maximal degree in co-relation 2236. Up to 3714 conditions per place. [2024-05-12 12:53:18,761 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 98 selfloop transitions, 10 changer transitions 0/116 dead transitions. [2024-05-12 12:53:18,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 116 transitions, 499 flow [2024-05-12 12:53:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-05-12 12:53:18,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074074074074074 [2024-05-12 12:53:18,764 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 129 flow. Second operand 5 states and 164 transitions. [2024-05-12 12:53:18,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 116 transitions, 499 flow [2024-05-12 12:53:18,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 116 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:18,766 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 188 flow [2024-05-12 12:53:18,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-05-12 12:53:18,767 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2024-05-12 12:53:18,767 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 188 flow [2024-05-12 12:53:18,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2024-05-12 12:53:18,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:18,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:18,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:53:18,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:18,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:18,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1744880756, now seen corresponding path program 1 times [2024-05-12 12:53:18,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:18,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017409458] [2024-05-12 12:53:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:18,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:18,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:18,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017409458] [2024-05-12 12:53:18,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017409458] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:18,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:18,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:53:18,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740339039] [2024-05-12 12:53:18,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:18,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:18,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:18,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:18,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:53:18,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-05-12 12:53:18,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2024-05-12 12:53:18,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:18,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-05-12 12:53:18,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:19,581 INFO L124 PetriNetUnfolderBase]: 5377/8635 cut-off events. [2024-05-12 12:53:19,582 INFO L125 PetriNetUnfolderBase]: For 3092/3134 co-relation queries the response was YES. [2024-05-12 12:53:19,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19602 conditions, 8635 events. 5377/8635 cut-off events. For 3092/3134 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 53014 event pairs, 1717 based on Foata normal form. 126/8733 useless extension candidates. Maximal degree in co-relation 12214. Up to 4046 conditions per place. [2024-05-12 12:53:19,621 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 95 selfloop transitions, 13 changer transitions 0/117 dead transitions. [2024-05-12 12:53:19,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 117 transitions, 569 flow [2024-05-12 12:53:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-05-12 12:53:19,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-05-12 12:53:19,623 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 188 flow. Second operand 5 states and 160 transitions. [2024-05-12 12:53:19,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 117 transitions, 569 flow [2024-05-12 12:53:19,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 117 transitions, 558 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:19,628 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 260 flow [2024-05-12 12:53:19,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2024-05-12 12:53:19,629 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2024-05-12 12:53:19,629 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 260 flow [2024-05-12 12:53:19,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2024-05-12 12:53:19,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:19,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:19,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:53:19,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:19,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:19,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1249866491, now seen corresponding path program 1 times [2024-05-12 12:53:19,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:19,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156150507] [2024-05-12 12:53:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:19,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:19,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:19,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156150507] [2024-05-12 12:53:19,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156150507] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:19,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:19,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:53:19,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281762668] [2024-05-12 12:53:19,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:19,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:53:19,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:19,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:53:19,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:53:19,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 54 [2024-05-12 12:53:19,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2024-05-12 12:53:19,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:19,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 54 [2024-05-12 12:53:19,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:20,005 INFO L124 PetriNetUnfolderBase]: 2832/5028 cut-off events. [2024-05-12 12:53:20,006 INFO L125 PetriNetUnfolderBase]: For 1470/1509 co-relation queries the response was YES. [2024-05-12 12:53:20,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10892 conditions, 5028 events. 2832/5028 cut-off events. For 1470/1509 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 33982 event pairs, 2788 based on Foata normal form. 3/4773 useless extension candidates. Maximal degree in co-relation 6212. Up to 4250 conditions per place. [2024-05-12 12:53:20,026 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 33 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-05-12 12:53:20,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 332 flow [2024-05-12 12:53:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:53:20,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:53:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-05-12 12:53:20,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-05-12 12:53:20,028 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 260 flow. Second operand 3 states and 93 transitions. [2024-05-12 12:53:20,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 332 flow [2024-05-12 12:53:20,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 320 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:20,032 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 260 flow [2024-05-12 12:53:20,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2024-05-12 12:53:20,033 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2024-05-12 12:53:20,034 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 260 flow [2024-05-12 12:53:20,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2024-05-12 12:53:20,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:20,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:20,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:53:20,034 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:20,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:20,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2120649268, now seen corresponding path program 1 times [2024-05-12 12:53:20,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:20,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895412847] [2024-05-12 12:53:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:20,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:20,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:20,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895412847] [2024-05-12 12:53:20,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895412847] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:20,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:20,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:53:20,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377678860] [2024-05-12 12:53:20,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:20,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:53:20,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:20,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:53:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:53:20,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-05-12 12:53:20,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2024-05-12 12:53:20,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:20,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-05-12 12:53:20,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:21,233 INFO L124 PetriNetUnfolderBase]: 10172/16074 cut-off events. [2024-05-12 12:53:21,234 INFO L125 PetriNetUnfolderBase]: For 9689/9689 co-relation queries the response was YES. [2024-05-12 12:53:21,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37967 conditions, 16074 events. 10172/16074 cut-off events. For 9689/9689 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 107708 event pairs, 2182 based on Foata normal form. 270/16342 useless extension candidates. Maximal degree in co-relation 37946. Up to 3340 conditions per place. [2024-05-12 12:53:21,335 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 169 selfloop transitions, 26 changer transitions 0/202 dead transitions. [2024-05-12 12:53:21,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 202 transitions, 1048 flow [2024-05-12 12:53:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:53:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:53:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 281 transitions. [2024-05-12 12:53:21,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5781893004115226 [2024-05-12 12:53:21,338 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 260 flow. Second operand 9 states and 281 transitions. [2024-05-12 12:53:21,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 202 transitions, 1048 flow [2024-05-12 12:53:21,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 202 transitions, 1044 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:21,355 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 447 flow [2024-05-12 12:53:21,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=447, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2024-05-12 12:53:21,358 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 23 predicate places. [2024-05-12 12:53:21,358 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 447 flow [2024-05-12 12:53:21,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2024-05-12 12:53:21,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:21,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:21,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:53:21,359 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:21,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:21,359 INFO L85 PathProgramCache]: Analyzing trace with hash -574449080, now seen corresponding path program 2 times [2024-05-12 12:53:21,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:21,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984795698] [2024-05-12 12:53:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:21,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:21,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:21,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984795698] [2024-05-12 12:53:21,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984795698] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:21,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:21,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:53:21,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839583774] [2024-05-12 12:53:21,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:21,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:53:21,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:21,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:53:21,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:53:21,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-05-12 12:53:21,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 447 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2024-05-12 12:53:21,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:21,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-05-12 12:53:21,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:23,399 INFO L124 PetriNetUnfolderBase]: 14755/23171 cut-off events. [2024-05-12 12:53:23,399 INFO L125 PetriNetUnfolderBase]: For 40556/40559 co-relation queries the response was YES. [2024-05-12 12:53:23,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61825 conditions, 23171 events. 14755/23171 cut-off events. For 40556/40559 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 163318 event pairs, 4181 based on Foata normal form. 200/23368 useless extension candidates. Maximal degree in co-relation 61794. Up to 14742 conditions per place. [2024-05-12 12:53:23,514 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 182 selfloop transitions, 22 changer transitions 0/211 dead transitions. [2024-05-12 12:53:23,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 211 transitions, 1345 flow [2024-05-12 12:53:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:53:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:53:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2024-05-12 12:53:23,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-05-12 12:53:23,516 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 447 flow. Second operand 9 states and 273 transitions. [2024-05-12 12:53:23,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 211 transitions, 1345 flow [2024-05-12 12:53:23,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 211 transitions, 1322 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:23,656 INFO L231 Difference]: Finished difference. Result has 95 places, 92 transitions, 700 flow [2024-05-12 12:53:23,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=700, PETRI_PLACES=95, PETRI_TRANSITIONS=92} [2024-05-12 12:53:23,657 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 36 predicate places. [2024-05-12 12:53:23,657 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 92 transitions, 700 flow [2024-05-12 12:53:23,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2024-05-12 12:53:23,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:23,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:23,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:53:23,658 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:23,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:23,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1756093584, now seen corresponding path program 3 times [2024-05-12 12:53:23,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:23,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816746001] [2024-05-12 12:53:23,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:23,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:23,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:23,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816746001] [2024-05-12 12:53:23,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816746001] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:23,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:23,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:53:23,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516439579] [2024-05-12 12:53:23,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:23,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:53:23,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:23,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:53:23,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:53:23,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-05-12 12:53:23,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 92 transitions, 700 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2024-05-12 12:53:23,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:23,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-05-12 12:53:23,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:25,989 INFO L124 PetriNetUnfolderBase]: 16662/26130 cut-off events. [2024-05-12 12:53:25,990 INFO L125 PetriNetUnfolderBase]: For 79788/79788 co-relation queries the response was YES. [2024-05-12 12:53:26,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73303 conditions, 26130 events. 16662/26130 cut-off events. For 79788/79788 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 186609 event pairs, 5082 based on Foata normal form. 198/26326 useless extension candidates. Maximal degree in co-relation 73265. Up to 17677 conditions per place. [2024-05-12 12:53:26,129 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 185 selfloop transitions, 23 changer transitions 0/215 dead transitions. [2024-05-12 12:53:26,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 215 transitions, 1521 flow [2024-05-12 12:53:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:53:26,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:53:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 272 transitions. [2024-05-12 12:53:26,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596707818930041 [2024-05-12 12:53:26,130 INFO L175 Difference]: Start difference. First operand has 95 places, 92 transitions, 700 flow. Second operand 9 states and 272 transitions. [2024-05-12 12:53:26,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 215 transitions, 1521 flow [2024-05-12 12:53:26,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 215 transitions, 1498 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:26,367 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 864 flow [2024-05-12 12:53:26,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=864, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2024-05-12 12:53:26,368 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 48 predicate places. [2024-05-12 12:53:26,368 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 864 flow [2024-05-12 12:53:26,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2024-05-12 12:53:26,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:26,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:26,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:53:26,369 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:26,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:26,369 INFO L85 PathProgramCache]: Analyzing trace with hash -234434266, now seen corresponding path program 4 times [2024-05-12 12:53:26,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:26,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908449435] [2024-05-12 12:53:26,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:26,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:26,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:26,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908449435] [2024-05-12 12:53:26,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908449435] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:26,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:26,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:53:26,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683898341] [2024-05-12 12:53:26,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:26,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:53:26,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:26,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:53:26,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:53:26,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-05-12 12:53:26,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 864 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2024-05-12 12:53:26,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:26,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-05-12 12:53:26,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:28,666 INFO L124 PetriNetUnfolderBase]: 16046/25220 cut-off events. [2024-05-12 12:53:28,667 INFO L125 PetriNetUnfolderBase]: For 104765/104765 co-relation queries the response was YES. [2024-05-12 12:53:28,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73136 conditions, 25220 events. 16046/25220 cut-off events. For 104765/104765 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 179469 event pairs, 4746 based on Foata normal form. 210/25428 useless extension candidates. Maximal degree in co-relation 73092. Up to 17677 conditions per place. [2024-05-12 12:53:28,825 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 206 selfloop transitions, 25 changer transitions 0/238 dead transitions. [2024-05-12 12:53:28,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 238 transitions, 1668 flow [2024-05-12 12:53:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 12:53:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 12:53:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 314 transitions. [2024-05-12 12:53:28,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286195286195287 [2024-05-12 12:53:28,827 INFO L175 Difference]: Start difference. First operand has 107 places, 100 transitions, 864 flow. Second operand 11 states and 314 transitions. [2024-05-12 12:53:28,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 238 transitions, 1668 flow [2024-05-12 12:53:29,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 238 transitions, 1614 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-05-12 12:53:29,268 INFO L231 Difference]: Finished difference. Result has 117 places, 100 transitions, 878 flow [2024-05-12 12:53:29,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=878, PETRI_PLACES=117, PETRI_TRANSITIONS=100} [2024-05-12 12:53:29,269 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 58 predicate places. [2024-05-12 12:53:29,269 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 100 transitions, 878 flow [2024-05-12 12:53:29,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2024-05-12 12:53:29,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:29,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:29,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:53:29,270 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:29,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash -158874860, now seen corresponding path program 5 times [2024-05-12 12:53:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:29,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885288192] [2024-05-12 12:53:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:29,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:29,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:29,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885288192] [2024-05-12 12:53:29,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885288192] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:29,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:29,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:53:29,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683641549] [2024-05-12 12:53:29,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:29,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:53:29,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:29,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:53:29,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:53:29,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-05-12 12:53:29,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 100 transitions, 878 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2024-05-12 12:53:29,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:29,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-05-12 12:53:29,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:31,633 INFO L124 PetriNetUnfolderBase]: 15560/24591 cut-off events. [2024-05-12 12:53:31,633 INFO L125 PetriNetUnfolderBase]: For 109177/109186 co-relation queries the response was YES. [2024-05-12 12:53:31,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70888 conditions, 24591 events. 15560/24591 cut-off events. For 109177/109186 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 175753 event pairs, 4281 based on Foata normal form. 156/24744 useless extension candidates. Maximal degree in co-relation 70841. Up to 16749 conditions per place. [2024-05-12 12:53:31,808 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 207 selfloop transitions, 25 changer transitions 0/239 dead transitions. [2024-05-12 12:53:31,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 239 transitions, 1750 flow [2024-05-12 12:53:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 12:53:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 12:53:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 313 transitions. [2024-05-12 12:53:31,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269360269360269 [2024-05-12 12:53:31,811 INFO L175 Difference]: Start difference. First operand has 117 places, 100 transitions, 878 flow. Second operand 11 states and 313 transitions. [2024-05-12 12:53:31,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 239 transitions, 1750 flow [2024-05-12 12:53:32,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 239 transitions, 1690 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-05-12 12:53:32,213 INFO L231 Difference]: Finished difference. Result has 120 places, 100 transitions, 875 flow [2024-05-12 12:53:32,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=875, PETRI_PLACES=120, PETRI_TRANSITIONS=100} [2024-05-12 12:53:32,214 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 61 predicate places. [2024-05-12 12:53:32,214 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 100 transitions, 875 flow [2024-05-12 12:53:32,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2024-05-12 12:53:32,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:32,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:32,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 12:53:32,215 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:32,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1254570312, now seen corresponding path program 6 times [2024-05-12 12:53:32,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:32,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47027212] [2024-05-12 12:53:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:32,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:32,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:32,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47027212] [2024-05-12 12:53:32,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47027212] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:32,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:32,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:53:32,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847357089] [2024-05-12 12:53:32,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:32,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:53:32,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:32,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:53:32,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:53:32,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-05-12 12:53:32,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 100 transitions, 875 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2024-05-12 12:53:32,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:32,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-05-12 12:53:32,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:34,446 INFO L124 PetriNetUnfolderBase]: 14900/23790 cut-off events. [2024-05-12 12:53:34,446 INFO L125 PetriNetUnfolderBase]: For 101594/101603 co-relation queries the response was YES. [2024-05-12 12:53:34,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65229 conditions, 23790 events. 14900/23790 cut-off events. For 101594/101603 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 170960 event pairs, 2359 based on Foata normal form. 276/24062 useless extension candidates. Maximal degree in co-relation 65181. Up to 5740 conditions per place. [2024-05-12 12:53:34,577 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 163 selfloop transitions, 51 changer transitions 0/221 dead transitions. [2024-05-12 12:53:34,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 221 transitions, 1700 flow [2024-05-12 12:53:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:53:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:53:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 274 transitions. [2024-05-12 12:53:34,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637860082304527 [2024-05-12 12:53:34,579 INFO L175 Difference]: Start difference. First operand has 120 places, 100 transitions, 875 flow. Second operand 9 states and 274 transitions. [2024-05-12 12:53:34,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 221 transitions, 1700 flow [2024-05-12 12:53:34,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 221 transitions, 1628 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-05-12 12:53:34,883 INFO L231 Difference]: Finished difference. Result has 121 places, 103 transitions, 972 flow [2024-05-12 12:53:34,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=972, PETRI_PLACES=121, PETRI_TRANSITIONS=103} [2024-05-12 12:53:34,884 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 62 predicate places. [2024-05-12 12:53:34,884 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 103 transitions, 972 flow [2024-05-12 12:53:34,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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) [2024-05-12 12:53:34,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:34,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:34,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 12:53:34,885 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:34,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1190816256, now seen corresponding path program 1 times [2024-05-12 12:53:34,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:34,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307416017] [2024-05-12 12:53:34,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:34,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:34,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:34,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307416017] [2024-05-12 12:53:34,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307416017] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:34,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:34,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405601021] [2024-05-12 12:53:34,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:34,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:53:34,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:53:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:53:34,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-05-12 12:53:34,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 103 transitions, 972 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-05-12 12:53:34,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:34,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-05-12 12:53:34,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:36,782 INFO L124 PetriNetUnfolderBase]: 14316/22835 cut-off events. [2024-05-12 12:53:36,782 INFO L125 PetriNetUnfolderBase]: For 98967/99424 co-relation queries the response was YES. [2024-05-12 12:53:36,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63328 conditions, 22835 events. 14316/22835 cut-off events. For 98967/99424 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 164830 event pairs, 3500 based on Foata normal form. 163/22936 useless extension candidates. Maximal degree in co-relation 63278. Up to 13228 conditions per place. [2024-05-12 12:53:36,905 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 87 selfloop transitions, 38 changer transitions 0/140 dead transitions. [2024-05-12 12:53:36,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 140 transitions, 1371 flow [2024-05-12 12:53:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:53:36,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:53:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-05-12 12:53:36,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2024-05-12 12:53:36,907 INFO L175 Difference]: Start difference. First operand has 121 places, 103 transitions, 972 flow. Second operand 4 states and 133 transitions. [2024-05-12 12:53:36,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 140 transitions, 1371 flow [2024-05-12 12:53:37,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 140 transitions, 1244 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-05-12 12:53:37,222 INFO L231 Difference]: Finished difference. Result has 118 places, 102 transitions, 943 flow [2024-05-12 12:53:37,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=943, PETRI_PLACES=118, PETRI_TRANSITIONS=102} [2024-05-12 12:53:37,223 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 59 predicate places. [2024-05-12 12:53:37,223 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 102 transitions, 943 flow [2024-05-12 12:53:37,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-05-12 12:53:37,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:37,224 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] [2024-05-12 12:53:37,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 12:53:37,224 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:37,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:37,224 INFO L85 PathProgramCache]: Analyzing trace with hash -48883238, now seen corresponding path program 1 times [2024-05-12 12:53:37,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:37,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140472924] [2024-05-12 12:53:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:37,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:37,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:37,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140472924] [2024-05-12 12:53:37,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140472924] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:37,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:37,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:37,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120342189] [2024-05-12 12:53:37,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:37,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:53:37,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:53:37,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:53:37,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-05-12 12:53:37,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 102 transitions, 943 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2024-05-12 12:53:37,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:37,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-05-12 12:53:37,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:39,031 INFO L124 PetriNetUnfolderBase]: 14012/22384 cut-off events. [2024-05-12 12:53:39,031 INFO L125 PetriNetUnfolderBase]: For 73934/74289 co-relation queries the response was YES. [2024-05-12 12:53:39,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59151 conditions, 22384 events. 14012/22384 cut-off events. For 73934/74289 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 162171 event pairs, 3388 based on Foata normal form. 164/22494 useless extension candidates. Maximal degree in co-relation 59102. Up to 12568 conditions per place. [2024-05-12 12:53:39,161 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 88 selfloop transitions, 38 changer transitions 0/141 dead transitions. [2024-05-12 12:53:39,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 141 transitions, 1352 flow [2024-05-12 12:53:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:53:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:53:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-05-12 12:53:39,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2024-05-12 12:53:39,162 INFO L175 Difference]: Start difference. First operand has 118 places, 102 transitions, 943 flow. Second operand 4 states and 133 transitions. [2024-05-12 12:53:39,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 141 transitions, 1352 flow [2024-05-12 12:53:39,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 141 transitions, 1280 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 12:53:39,282 INFO L231 Difference]: Finished difference. Result has 119 places, 102 transitions, 975 flow [2024-05-12 12:53:39,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=975, PETRI_PLACES=119, PETRI_TRANSITIONS=102} [2024-05-12 12:53:39,283 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 60 predicate places. [2024-05-12 12:53:39,283 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 102 transitions, 975 flow [2024-05-12 12:53:39,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2024-05-12 12:53:39,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:39,284 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] [2024-05-12 12:53:39,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 12:53:39,284 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:39,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:39,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1119297726, now seen corresponding path program 1 times [2024-05-12 12:53:39,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:39,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582930871] [2024-05-12 12:53:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:39,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:39,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:39,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582930871] [2024-05-12 12:53:39,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582930871] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:39,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:39,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:53:39,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432341760] [2024-05-12 12:53:39,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:39,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:53:39,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:53:39,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:53:39,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-05-12 12:53:39,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 102 transitions, 975 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-05-12 12:53:39,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:39,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-05-12 12:53:39,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:41,453 INFO L124 PetriNetUnfolderBase]: 15093/24159 cut-off events. [2024-05-12 12:53:41,453 INFO L125 PetriNetUnfolderBase]: For 65957/65957 co-relation queries the response was YES. [2024-05-12 12:53:41,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63919 conditions, 24159 events. 15093/24159 cut-off events. For 65957/65957 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 174574 event pairs, 2043 based on Foata normal form. 60/24217 useless extension candidates. Maximal degree in co-relation 63869. Up to 5740 conditions per place. [2024-05-12 12:53:41,600 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 212 selfloop transitions, 52 changer transitions 0/271 dead transitions. [2024-05-12 12:53:41,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 271 transitions, 1946 flow [2024-05-12 12:53:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 12:53:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 12:53:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 352 transitions. [2024-05-12 12:53:41,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432098765432098 [2024-05-12 12:53:41,602 INFO L175 Difference]: Start difference. First operand has 119 places, 102 transitions, 975 flow. Second operand 12 states and 352 transitions. [2024-05-12 12:53:41,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 271 transitions, 1946 flow [2024-05-12 12:53:41,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 271 transitions, 1867 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 12:53:41,819 INFO L231 Difference]: Finished difference. Result has 128 places, 103 transitions, 1027 flow [2024-05-12 12:53:41,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1027, PETRI_PLACES=128, PETRI_TRANSITIONS=103} [2024-05-12 12:53:41,820 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 69 predicate places. [2024-05-12 12:53:41,820 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 103 transitions, 1027 flow [2024-05-12 12:53:41,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-05-12 12:53:41,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:41,820 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] [2024-05-12 12:53:41,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 12:53:41,821 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:41,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:41,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1206137406, now seen corresponding path program 2 times [2024-05-12 12:53:41,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:41,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394386040] [2024-05-12 12:53:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:41,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:41,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:41,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394386040] [2024-05-12 12:53:41,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394386040] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:41,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:41,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:53:41,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393781875] [2024-05-12 12:53:41,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:41,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:53:41,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:53:41,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:53:41,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-05-12 12:53:41,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 103 transitions, 1027 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-05-12 12:53:41,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:41,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-05-12 12:53:41,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:43,987 INFO L124 PetriNetUnfolderBase]: 14947/23927 cut-off events. [2024-05-12 12:53:43,988 INFO L125 PetriNetUnfolderBase]: For 57024/57024 co-relation queries the response was YES. [2024-05-12 12:53:44,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63487 conditions, 23927 events. 14947/23927 cut-off events. For 57024/57024 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 172736 event pairs, 1983 based on Foata normal form. 60/23985 useless extension candidates. Maximal degree in co-relation 63436. Up to 5740 conditions per place. [2024-05-12 12:53:44,191 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 210 selfloop transitions, 52 changer transitions 0/269 dead transitions. [2024-05-12 12:53:44,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 269 transitions, 1905 flow [2024-05-12 12:53:44,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 12:53:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 12:53:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 350 transitions. [2024-05-12 12:53:44,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5401234567901234 [2024-05-12 12:53:44,193 INFO L175 Difference]: Start difference. First operand has 128 places, 103 transitions, 1027 flow. Second operand 12 states and 350 transitions. [2024-05-12 12:53:44,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 269 transitions, 1905 flow [2024-05-12 12:53:44,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 269 transitions, 1813 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-05-12 12:53:44,582 INFO L231 Difference]: Finished difference. Result has 133 places, 103 transitions, 1045 flow [2024-05-12 12:53:44,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1045, PETRI_PLACES=133, PETRI_TRANSITIONS=103} [2024-05-12 12:53:44,583 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 74 predicate places. [2024-05-12 12:53:44,583 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 103 transitions, 1045 flow [2024-05-12 12:53:44,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-05-12 12:53:44,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:44,583 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] [2024-05-12 12:53:44,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 12:53:44,583 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:44,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:44,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1882296781, now seen corresponding path program 1 times [2024-05-12 12:53:44,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:44,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363227733] [2024-05-12 12:53:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:44,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:44,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:44,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363227733] [2024-05-12 12:53:44,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363227733] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:44,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:44,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:53:44,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832562976] [2024-05-12 12:53:44,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:44,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:53:44,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:44,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:53:44,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:53:44,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-05-12 12:53:44,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 103 transitions, 1045 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-05-12 12:53:44,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:44,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-05-12 12:53:44,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:46,891 INFO L124 PetriNetUnfolderBase]: 15287/24503 cut-off events. [2024-05-12 12:53:46,891 INFO L125 PetriNetUnfolderBase]: For 59197/59206 co-relation queries the response was YES. [2024-05-12 12:53:47,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64954 conditions, 24503 events. 15287/24503 cut-off events. For 59197/59206 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 177607 event pairs, 2534 based on Foata normal form. 66/24565 useless extension candidates. Maximal degree in co-relation 64902. Up to 5740 conditions per place. [2024-05-12 12:53:47,061 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 204 selfloop transitions, 52 changer transitions 0/263 dead transitions. [2024-05-12 12:53:47,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 263 transitions, 1903 flow [2024-05-12 12:53:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 12:53:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 12:53:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 343 transitions. [2024-05-12 12:53:47,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529320987654321 [2024-05-12 12:53:47,063 INFO L175 Difference]: Start difference. First operand has 133 places, 103 transitions, 1045 flow. Second operand 12 states and 343 transitions. [2024-05-12 12:53:47,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 263 transitions, 1903 flow [2024-05-12 12:53:47,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 263 transitions, 1799 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-05-12 12:53:47,260 INFO L231 Difference]: Finished difference. Result has 134 places, 104 transitions, 1060 flow [2024-05-12 12:53:47,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1060, PETRI_PLACES=134, PETRI_TRANSITIONS=104} [2024-05-12 12:53:47,260 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 75 predicate places. [2024-05-12 12:53:47,260 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 104 transitions, 1060 flow [2024-05-12 12:53:47,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-05-12 12:53:47,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:47,261 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] [2024-05-12 12:53:47,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 12:53:47,261 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:47,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:47,261 INFO L85 PathProgramCache]: Analyzing trace with hash 327817069, now seen corresponding path program 2 times [2024-05-12 12:53:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:47,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076841890] [2024-05-12 12:53:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:47,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:47,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076841890] [2024-05-12 12:53:47,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076841890] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:47,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:47,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:53:47,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192025417] [2024-05-12 12:53:47,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:47,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:53:47,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:47,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:53:47,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:53:47,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-05-12 12:53:47,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 104 transitions, 1060 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-05-12 12:53:47,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:47,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-05-12 12:53:47,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:49,414 INFO L124 PetriNetUnfolderBase]: 15141/24271 cut-off events. [2024-05-12 12:53:49,414 INFO L125 PetriNetUnfolderBase]: For 50251/50260 co-relation queries the response was YES. [2024-05-12 12:53:49,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63390 conditions, 24271 events. 15141/24271 cut-off events. For 50251/50260 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 175692 event pairs, 2474 based on Foata normal form. 66/24333 useless extension candidates. Maximal degree in co-relation 63337. Up to 5740 conditions per place. [2024-05-12 12:53:49,585 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 202 selfloop transitions, 52 changer transitions 0/261 dead transitions. [2024-05-12 12:53:49,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 261 transitions, 1825 flow [2024-05-12 12:53:49,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 12:53:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 12:53:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 341 transitions. [2024-05-12 12:53:49,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5262345679012346 [2024-05-12 12:53:49,587 INFO L175 Difference]: Start difference. First operand has 134 places, 104 transitions, 1060 flow. Second operand 12 states and 341 transitions. [2024-05-12 12:53:49,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 261 transitions, 1825 flow [2024-05-12 12:53:49,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 261 transitions, 1595 flow, removed 6 selfloop flow, removed 23 redundant places. [2024-05-12 12:53:49,732 INFO L231 Difference]: Finished difference. Result has 120 places, 102 transitions, 854 flow [2024-05-12 12:53:49,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=854, PETRI_PLACES=120, PETRI_TRANSITIONS=102} [2024-05-12 12:53:49,732 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 61 predicate places. [2024-05-12 12:53:49,733 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 102 transitions, 854 flow [2024-05-12 12:53:49,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-05-12 12:53:49,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:49,733 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, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:49,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 12:53:49,733 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:49,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:49,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1828980706, now seen corresponding path program 1 times [2024-05-12 12:53:49,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:49,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379569002] [2024-05-12 12:53:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:49,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:49,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:49,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379569002] [2024-05-12 12:53:49,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379569002] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:49,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:49,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:53:49,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969749181] [2024-05-12 12:53:49,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:49,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:53:49,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:49,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:53:49,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:53:49,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-05-12 12:53:49,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 102 transitions, 854 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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) [2024-05-12 12:53:49,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:49,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-05-12 12:53:49,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:51,447 INFO L124 PetriNetUnfolderBase]: 13932/22417 cut-off events. [2024-05-12 12:53:51,447 INFO L125 PetriNetUnfolderBase]: For 25568/25568 co-relation queries the response was YES. [2024-05-12 12:53:51,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56296 conditions, 22417 events. 13932/22417 cut-off events. For 25568/25568 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 161293 event pairs, 2481 based on Foata normal form. 90/22505 useless extension candidates. Maximal degree in co-relation 56259. Up to 5740 conditions per place. [2024-05-12 12:53:51,846 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 156 selfloop transitions, 50 changer transitions 0/213 dead transitions. [2024-05-12 12:53:51,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 213 transitions, 1491 flow [2024-05-12 12:53:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:53:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:53:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-05-12 12:53:51,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349794238683128 [2024-05-12 12:53:51,847 INFO L175 Difference]: Start difference. First operand has 120 places, 102 transitions, 854 flow. Second operand 9 states and 260 transitions. [2024-05-12 12:53:51,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 213 transitions, 1491 flow [2024-05-12 12:53:51,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 213 transitions, 1389 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-05-12 12:53:51,915 INFO L231 Difference]: Finished difference. Result has 118 places, 100 transitions, 841 flow [2024-05-12 12:53:51,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=841, PETRI_PLACES=118, PETRI_TRANSITIONS=100} [2024-05-12 12:53:51,915 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 59 predicate places. [2024-05-12 12:53:51,915 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 100 transitions, 841 flow [2024-05-12 12:53:51,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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) [2024-05-12 12:53:51,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:51,916 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, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:51,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 12:53:51,916 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:51,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:51,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1264069750, now seen corresponding path program 2 times [2024-05-12 12:53:51,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:51,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601252827] [2024-05-12 12:53:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:51,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:52,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:52,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601252827] [2024-05-12 12:53:52,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601252827] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:53:52,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771006621] [2024-05-12 12:53:52,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 12:53:52,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:53:52,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:53:52,317 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) [2024-05-12 12:53:52,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 12:53:52,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-05-12 12:53:52,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:53:52,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2024-05-12 12:53:52,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:53:52,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 12:53:52,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-05-12 12:53:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:52,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 12:53:52,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771006621] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:52,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-05-12 12:53:52,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2024-05-12 12:53:52,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147554825] [2024-05-12 12:53:52,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:52,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:53:52,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:52,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:53:52,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-05-12 12:53:52,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-05-12 12:53:52,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 100 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 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) [2024-05-12 12:53:52,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:52,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-05-12 12:53:52,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:54,642 INFO L124 PetriNetUnfolderBase]: 15593/25433 cut-off events. [2024-05-12 12:53:54,643 INFO L125 PetriNetUnfolderBase]: For 11577/11743 co-relation queries the response was YES. [2024-05-12 12:53:54,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60022 conditions, 25433 events. 15593/25433 cut-off events. For 11577/11743 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 194766 event pairs, 2265 based on Foata normal form. 171/25230 useless extension candidates. Maximal degree in co-relation 59984. Up to 13444 conditions per place. [2024-05-12 12:53:54,764 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 99 selfloop transitions, 14 changer transitions 23/199 dead transitions. [2024-05-12 12:53:54,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 199 transitions, 1333 flow [2024-05-12 12:53:54,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 12:53:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 12:53:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 306 transitions. [2024-05-12 12:53:54,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-05-12 12:53:54,765 INFO L175 Difference]: Start difference. First operand has 118 places, 100 transitions, 841 flow. Second operand 10 states and 306 transitions. [2024-05-12 12:53:54,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 199 transitions, 1333 flow [2024-05-12 12:53:54,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 199 transitions, 1233 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 12:53:54,830 INFO L231 Difference]: Finished difference. Result has 124 places, 113 transitions, 824 flow [2024-05-12 12:53:54,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=824, PETRI_PLACES=124, PETRI_TRANSITIONS=113} [2024-05-12 12:53:54,831 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 65 predicate places. [2024-05-12 12:53:54,831 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 113 transitions, 824 flow [2024-05-12 12:53:54,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 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) [2024-05-12 12:53:54,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:54,831 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, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:54,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-05-12 12:53:55,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-05-12 12:53:55,043 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:55,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:55,044 INFO L85 PathProgramCache]: Analyzing trace with hash 985397326, now seen corresponding path program 3 times [2024-05-12 12:53:55,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:55,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704656663] [2024-05-12 12:53:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:55,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:55,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:55,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704656663] [2024-05-12 12:53:55,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704656663] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:53:55,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890117881] [2024-05-12 12:53:55,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 12:53:55,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:53:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:53:55,358 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) [2024-05-12 12:53:55,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-05-12 12:53:55,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-05-12 12:53:55,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:53:55,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 12:53:55,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:53:55,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 12:53:55,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-05-12 12:53:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:55,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 12:53:55,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890117881] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:55,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-05-12 12:53:55,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2024-05-12 12:53:55,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148442023] [2024-05-12 12:53:55,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:55,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:53:55,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:55,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:53:55,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2024-05-12 12:53:55,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-05-12 12:53:55,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 113 transitions, 824 flow. Second operand has 8 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 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) [2024-05-12 12:53:55,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:55,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-05-12 12:53:55,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:58,875 INFO L124 PetriNetUnfolderBase]: 24214/39222 cut-off events. [2024-05-12 12:53:58,876 INFO L125 PetriNetUnfolderBase]: For 15856/16040 co-relation queries the response was YES. [2024-05-12 12:53:59,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97853 conditions, 39222 events. 24214/39222 cut-off events. For 15856/16040 co-relation queries the response was YES. Maximal size of possible extension queue 1522. Compared 324234 event pairs, 5065 based on Foata normal form. 189/38822 useless extension candidates. Maximal degree in co-relation 97810. Up to 18149 conditions per place. [2024-05-12 12:53:59,115 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 160 selfloop transitions, 19 changer transitions 10/252 dead transitions. [2024-05-12 12:53:59,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 252 transitions, 1582 flow [2024-05-12 12:53:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 12:53:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 12:53:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 361 transitions. [2024-05-12 12:53:59,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6077441077441077 [2024-05-12 12:53:59,116 INFO L175 Difference]: Start difference. First operand has 124 places, 113 transitions, 824 flow. Second operand 11 states and 361 transitions. [2024-05-12 12:53:59,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 252 transitions, 1582 flow [2024-05-12 12:53:59,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 252 transitions, 1576 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:59,218 INFO L231 Difference]: Finished difference. Result has 139 places, 128 transitions, 984 flow [2024-05-12 12:53:59,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=984, PETRI_PLACES=139, PETRI_TRANSITIONS=128} [2024-05-12 12:53:59,219 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 80 predicate places. [2024-05-12 12:53:59,219 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 128 transitions, 984 flow [2024-05-12 12:53:59,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 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) [2024-05-12 12:53:59,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:59,219 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, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:59,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-05-12 12:53:59,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:53:59,435 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:59,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:59,436 INFO L85 PathProgramCache]: Analyzing trace with hash -526200712, now seen corresponding path program 4 times [2024-05-12 12:53:59,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:59,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206015066] [2024-05-12 12:53:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:59,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:59,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:59,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206015066] [2024-05-12 12:53:59,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206015066] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:53:59,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789564486] [2024-05-12 12:53:59,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 12:53:59,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:53:59,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:53:59,774 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) [2024-05-12 12:53:59,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-05-12 12:53:59,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 12:53:59,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:53:59,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2024-05-12 12:53:59,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:53:59,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 12:53:59,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-05-12 12:53:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:59,985 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 12:53:59,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789564486] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:59,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-05-12 12:53:59,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2024-05-12 12:53:59,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119516677] [2024-05-12 12:53:59,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:59,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:53:59,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:59,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:53:59,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-05-12 12:53:59,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-05-12 12:53:59,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 128 transitions, 984 flow. Second operand has 8 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 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) [2024-05-12 12:53:59,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:59,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-05-12 12:53:59,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand